Carbon monoxide

Formula: CO
Molecular weight: 28.0101
IUPAC Standard InChI: InChI=1S/CO/c1-2
IUPAC Standard InChIKey: UGFAIRIUMAVXCW-UHFFFAOYSA-N
CAS Registry Number: 630-08-0
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript.
Other names: Carbon oxide (CO); CO; Exhaust gas; Flue gas; Carbonic oxide; Carbon oxide; Carbone (oxyde de); Carbonio (ossido di); Kohlenmonoxid; Kohlenoxyd; Koolmonoxyde; NA 9202; Oxyde de carbone; UN 1016; Wegla tlenek; Carbon monooxide
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Information on this page:
Other data available:
- Phase change data
- Reaction thermochemistry data: reactions 51 to 100, reactions 101 to 150, reactions 151 to 200, reactions 201 to 249
- Henry's Law data
- Mass spectrum (electron ionization)
- Constants of diatomic molecules
- Fluid Properties
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Gas phase thermochemistry data

Go To: Top, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, References, Notes

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	-110.53 ± 0.17	kJ/mol	Review	Cox, Wagman, et al., 1984	CODATA Review value
Δ_fH°_gas	-110.53	kJ/mol	Review	Chase, 1998	Data last reviewed in September, 1965
Quantity	Value	Units	Method	Reference	Comment
S°_{gas,1 bar}	197.660 ± 0.004	J/mol*K	Review	Cox, Wagman, et al., 1984	CODATA Review value
S°_{gas,1 bar}	197.66	J/mol*K	Review	Chase, 1998	Data last reviewed in September, 1965

Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
C_p = heat capacity (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.

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Temperature (K)	298. to 1300.	1300. to 6000.
A	25.56759	35.15070
B	6.096130	1.300095
C	4.054656	-0.205921
D	-2.671301	0.013550
E	0.131021	-3.282780
F	-118.0089	-127.8375
G	227.3665	231.7120
H	-110.5271	-110.5271
Reference	Chase, 1998	Chase, 1998
Comment	Data last reviewed in September, 1965	Data last reviewed in September, 1965

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, References, Notes

Data compiled as indicated in comments:
MS - José A. Martinho Simões
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
RCD - Robert C. Dunbar
B - John E. Bartmess
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. A general reaction search form is also available. Future versions of this site may rely on reaction search pages in place of the enumerated reaction displays seen below.

Reactions 1 to 50

(solution) + (solution) = C₁₄H₂₁MnO₂ (solution) + Carbon monoxide (solution)

By formula: C₈H₅MnO₃ (solution) + C₇H₁₆ (solution) = C₁₄H₂₁MnO₂ (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	196. ± 7.	kJ/mol	AVG	N/A	Average of 18 values; Individual data points

(solution) + (solution) = C₁₂H₁₆CrO₅ (solution) + Carbon monoxide (solution)

By formula: C₆CrO₆ (solution) + C₇H₁₆ (solution) = C₁₂H₁₆CrO₅ (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	113. ± 3.	kJ/mol	AVG	N/A	Average of 13 values; Individual data points

(solution) = C₅CrO₅ (solution) + Carbon monoxide (solution)

By formula: C₆CrO₆ (solution) = C₅CrO₅ (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	168.2 ± 2.5	kJ/mol	KinS	Graham and Angelici, 1967	solvent: Decalin; The reaction enthalpy and entropy were identified with the enthalpy and entropy of activation for the reaction of Cr(CO)6(solution) with PBu3(solution).; MS
Δ_rH°	159.4	kJ/mol	KinS	Werner and Prinz, 1966	solvent: n-Decane+cyclohexane mixture; The reaction enthalpy and entropy were identified with the enthalpy and entropy of activation for the reactions of Cr(CO)6(solution) with a phosphine and an amine. The results were quoted from Graham and Angelici, 1967.; MS

(solution) = C₅MoO₅ (solution) + Carbon monoxide (solution)

By formula: C₆MoO₆ (solution) = C₅MoO₅ (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	132.6 ± 5.9	kJ/mol	KinS	Graham and Angelici, 1967	solvent: Decalin; The reaction enthalpy and entropy were identified with the enthalpy and entropy of activation for the reaction of Mo(CO)6(solution) with PBu3(solution).; MS
Δ_rH°	126.4	kJ/mol	KinS	Werner and Prinz, 1966	solvent: n-Decane+cyclohexane mixture; The reaction enthalpy and entropy were identified with the enthalpy and entropy of activation for the reactions of Mo(CO)6(solution) with a phosphine and an amine. The results were quoted from Graham and Angelici, 1967.; MS

(solution) = C₅O₅W (solution) + Carbon monoxide (solution)

By formula: C₆O₆W (solution) = C₅O₅W (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	166.9 ± 6.7	kJ/mol	KinS	Graham and Angelici, 1967	solvent: Decalin; The reaction enthalpy and entropy were identified with the enthalpy and entropy of activation for the reaction of W(CO)6(solution) with PBu3(solution).; MS
Δ_rH°	163.2	kJ/mol	KinS	Werner and Prinz, 1966	solvent: n-Decane+cyclohexane mixture; The reaction enthalpy and entropy were identified with the enthalpy and entropy of activation for the reactions of W(CO)6(solution) with a phosphine and an amine. The results were quoted from Graham and Angelici, 1967.; MS

C₁₁H₂O₁₁Os (solution) + Carbon monoxide (solution) = (g) + (solution)

By formula: C₁₁H₂O₁₁Os (solution) + CO (solution) = H₂ (g) + C₁₂O₁₂Os₃ (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-37.7 ± 9.6	kJ/mol	ES/KS	Poë, Sampson, et al., 1993	solvent: Decalin; Calculated from equilibrium and kinetic data Poë, Sampson, et al., 1993.; MS
Δ_rH°	-77.4 ± 9.7	kJ/mol	N/A	Poë, Sampson, et al., 1993	solvent: Decalin; Calculated from data for the reactions Os3(CO)10(H)2(solution) + CO(solution) = Os3(CO)11(H)2(solution) (hrxn [kJ/mol]=-39.7±1.3, srxn [J/(mol K)]=-80.3±3.8) and Os3(CO)11(H)2(solution) + CO(solution) = Os3(CO)12(solution) + H2(g) (hrxn [kJ/mol]=-37.7±9.6, srxn [J/(mol K)]=-32.6±27.6) Poë, Sampson, et al., 1993.; MS

(g) = C₄FeO₄ (g) + Carbon monoxide (g)

By formula: C₅FeO₅ (g) = C₄FeO₄ (g) + CO (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	174. ± 13.	kJ/mol	LPHP	Lewis, Golden, et al., 1984	Please also see Smith and Laine, 1981. Temperature range: 670-780 K. The reaction enthalpy at 298 K relies on an activation energy of 167.4 kJ/mol and assumes a negligible activation barrier for product recombination. The enthalpy of formation relies on -723.9 ± 6.7 kJ/mol for the enthalpy of formation of Fe(CO)5(g). At least two other estimates of the activation energy for the Fe(CO)4(g) + CO(g) recombination have been reported: 7.1 kJ/mol Miller and Grant, 1985 and 16.7 kJ/mol Walsh, 1986. In Lewis, Golden, et al., 1984 authors have considered that the Fe(CO)4(g) fragment is in its singlet excited state. However, it has also been suggested that the fragment is formed in its triplet ground state Ray, Brandow, et al., 1988 Sunderlin, Wang, et al., 1992; MS
Δ_rH°	232. ± 48.	kJ/mol	N/A	Engelking and Lineberger, 1979	Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

(g) = C₅MoO₅ (g) + Carbon monoxide (g)

By formula: C₆MoO₆ (g) = C₅MoO₅ (g) + CO (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	146. ± 21.	kJ/mol	KinG	Ganske and Rosenfeld, 1990	MS
Δ_rH°	170. ± 13.	kJ/mol	LPHP	Lewis, Golden, et al., 1984	The reaction enthalpy at 298 K relies on an activation energy of 163.2 kJ/mol and assumes a negligible activation barrier for product recombination. The enthalpy of formation relies on -915.3 ± 2.1 kJ/mol for the enthalpy of formation of Mo(CO)6(g); MS
Δ_rH°	126.4	kJ/mol	KinG	Cetini and Gambino, 1963	Please also see Graham and Angelici, 1967. The reaction enthalpy and entropy were identified with the enthalpy and entropy of activation for the reaction of Mo(CO)6(g) with CO(g) Cetini and Gambino, 1963. The results were quoted from Graham and Angelici, 1967.; MS

(g) = C₅O₅W (g) + Carbon monoxide (g)

By formula: C₆O₆W (g) = C₅O₅W (g) + CO (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	193. ± 13.	kJ/mol	LPHP	Lewis, Golden, et al., 1984	The reaction enthalpy at 298 K relies on an activation energy of 186.2 kJ/mol and assumes a negligible activation barrier for product recombination. The enthalpy of formation relies on -883.9 ± 2.7 kJ/mol for the enthalpy of formation of W(CO)6(g); MS
Δ_rH°	166.5	kJ/mol	KinG	Cetini and Gambino, 1963, 2	Please also see Graham and Angelici, 1967. The reaction enthalpy and entropy were identified with the enthalpy and entropy of activation for the reaction of W(CO)6(g) with CO(g) Cetini and Gambino, 1963, 2. The results were quoted from Graham and Angelici, 1967.; MS

(g) = C₅CrO₅ (g) + Carbon monoxide (g)

By formula: C₆CrO₆ (g) = C₅CrO₅ (g) + CO (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	155. ± 21.	kJ/mol	KinG	Fletcher and Rosenfeld, 1988	MS
Δ_rH°	154. ± 13.	kJ/mol	LPHP	Lewis, Golden, et al., 1984	Temperature range: 740-820 K. The reaction enthalpy at 298 K relies on an activation energy of 147.7 kJ/mol and assumes a negligible activation barrier for product recombination.; MS
Δ_rH°	161.9	kJ/mol	KinG	Pajaro, Calderazzo, et al., 1960	Please also see Graham and Angelici, 1967. The reaction enthalpy and entropy were identified with the enthalpy and entropy of activation for the reaction of Cr(CO)6(g) with CO(g) Pajaro, Calderazzo, et al., 1960. The results were quoted from Graham and Angelici, 1967.; MS

C₁₀H₅CrNO₅ (solution) + Carbon monoxide (solution) = (solution) + (solution)

By formula: C₁₀H₅CrNO₅ (solution) + CO (solution) = C₆CrO₆ (solution) + C₄H₄N₂ (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-61.9	kJ/mol	KinS	Wovkulich and Atwood, 1980	solvent: Hexane; The data rely on the enthalpy and entropy of activation for the forward reaction, 106.3 ± 4.6 kJ/mol and 13.0±14.6 J/(mol K) Dennenberg and Darensbourg, 1972, and also on the enthalpy and entropy of activation for the Cr-CO dissociation in Cr(CO)6, 168.2 ± 2.5 kJ/mol and 94.6±6.3 J/(mol K) Graham and Angelici, 1967. The latter data were obtained in decalin; MS

CO⁺ + Carbon monoxide = (CO⁺ • )

By formula: CO⁺ + CO = (CO⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	67.	kJ/mol	PIPECO	Norwood, Guo, et al., 1988	gas phase; CO+ in state B, Δ_rH>; M
Δ_rH°	93.7	kJ/mol	PI	Linn, Ono, et al., 1981	gas phase; M
Δ_rH°	120. ± 30.	kJ/mol	EI	Munson and Franlin, 1962	gas phase; from IP'switching reaction and heats of formation; M
Δ_rH°	106.	kJ/mol	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; Δ_rH>, DG>; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.	J/mol*K	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; Δ_rH>, DG>; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
21.	340.	HPMS	Chong and Franklin, 1971	gas phase; equilibrium uncertain; M
48.1	695.	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; Δ_rH>, DG>; M

(cr) = 6 Carbon monoxide (g) + (cr)

By formula: C₆O₆W (cr) = 6CO (g) + W (cr)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	298.8 ± 4.7	kJ/mol	TD-HFC, HAL-HFC	Al-Takhin, Connor, et al., 1984	The reaction enthalpy corresponds to the TD experiments and leads to -962.0 ± 4.8 kJ/mol for the enthalpy of formation. The value -960±3 was recommended by the authors Al-Takhin, Connor, et al., 1984. Other values for the enthalpy of sublimation have been reported: 73. ± 1. kJ/mol Adedeji, Brown, et al., 1975, 74.1 ± 4.2 kJ/mol Hieber and Romberg, 1935, 69.9 ± 4.2 kJ/mol Rezukhina and Shvyrev, 1952, and 78.9 ± 1.1 kJ/mol Daamen, Ernsting, et al., 1979 Boxhoorn, Ernsting, et al., 1980. See also Pilcher, Ware, et al., 1975; MS
Δ_rH°	296.1 ± 1.8	kJ/mol	TD-HZC	Barnes, Pilcher, et al., 1974	Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977.; MS

(solution) + 3 Carbon monoxide (solution) = 3C₅O₅Ru (solution)

By formula: C₁₂O₁₂Ru₃ (solution) + 3CO (solution) = 3C₅O₅Ru (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-13.0 ± 1.1	kJ/mol	EqS	Koelliker and Bor, 1991	solvent: Isooctane; Temperature range: 373-448 K; MS
Δ_rH°	-27.1 ± 1.9	kJ/mol	EqS	Bor, 1986	solvent: n-Hexane; Temperature range: ca. 348-448 K; MS

(solution) = C₇Co₂O₇ (solution) + Carbon monoxide (solution)

By formula: C₈Co₂O₈ (solution) = C₇Co₂O₇ (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	92.7	kJ/mol	KinS	Ungváry and Markó, 1974	solvent: Heptane; Temperature range: 298-328 K; MS
Δ_rH°	87.9	kJ/mol	KinS	Ungváry, 1972	solvent: Heptane; Temperature range: 307-337 K; MS

(cr) + (l) = C₁₀H₅NO₅W (cr) + Carbon monoxide (g)

By formula: C₆O₆W (cr) + C₄H₄N₂ (l) = C₁₀H₅NO₅W (cr) + CO (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	34.6	kJ/mol	N/A	Nakashima and Adamson, 1982	The reaction enthalpy was calculated from the enthalpy of the reaction W(CO)6(solution) + py(solution) = W(CO)5(py)(solution) + CO(solution) in cyclohexane, 27.4 ± 2.9 kJ/mol, together with the enthalpies of solution of W(CO)6(cr), W(CO)5(py)(cr), and py(l), 35.7, 36.4, and 7.9 kJ/mol, respectively Nakashima and Adamson, 1982.; MS

+ Carbon monoxide = ( • )

By formula: CHO⁺ + CO = (CHO⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	45.2	kJ/mol	PHPMS	Jennings, Headley, et al., 1982	gas phase; M
Δ_rH°	53.6	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Δ_rH°	49.0	kJ/mol	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	94.1	J/mol*K	PHPMS	Jennings, Headley, et al., 1982	gas phase; M
Δ_rS°	100.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Δ_rS°	87.4	J/mol*K	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; M

+ Carbon monoxide = ( • )

By formula: Co⁺ + CO = (Co⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	174. ± 7.1	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	160. ± 10.	kJ/mol	MKER	Carpenter, van Koppen, et al., 1995	gas phase; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
174. (+6.7,-0.)		CID	Goebel, Haynes, et al., 1995	gas phase; guided ion beam CID; M
163. (+20.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

(solution) + (solution) = C₁₂H₁₆MoO₅ (solution) + Carbon monoxide (solution)

By formula: C₆MoO₆ (solution) + C₇H₁₆ (solution) = C₁₂H₁₆MoO₅ (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	135. ± 12.	kJ/mol	PAC	Johnson, Popov, et al., 1991	solvent: Heptane; The reaction enthalpy relies on 0.67 for the quantum yield of CO dissociation.; MS
Δ_rH°	133.1 ± 5.4	kJ/mol	PAC	Morse, Parker, et al., 1989	solvent: Heptane; The reaction enthalpy relies on 0.67 for the quantum yield of CO dissociation; MS

C₂FeO₂ (g) = Carbon monoxide (g) + CFeO (g)

By formula: C₂FeO₂ (g) = CO (g) + CFeO (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	154. ± 15.	kJ/mol	FA-SIFT	Sunderlin, Wang, et al., 1992	MS
Δ_rH°	>113.	kJ/mol	N/A	Venkataraman, Bandukwalla, et al., 1989	Method: Velocity distributions of photofragments from Fe(CO)5.; MS
Δ_rH°	100. ± 29.	kJ/mol	N/A	Engelking and Lineberger, 1979	Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

(g) = 4 Carbon monoxide (g) + (cr)

By formula: C₄NiO₄ (g) = 4CO (g) + Ni (cr)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	160.4 ± 2.5	kJ/mol	EqG	Monteil, Raffin, et al., 1988	The reaction enthalpy is the average of several 2nd and 3rd law results Monteil, Raffin, et al., 1988; MS

+ Carbon monoxide = ( • )

By formula: Ni⁺ + CO = (Ni⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	160. ± 10.	kJ/mol	MKER	Carpenter, van Koppen, et al., 1995	gas phase; determined from MKER and theory; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
174. (+10.,-0.)		CID	Khan, Steele, et al., 1995	gas phase; guided ion beam CID; M
178. (+9.2,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

C₃FeO₃ (g) = Carbon monoxide (g) + C₂FeO₂ (g)

By formula: C₃FeO₃ (g) = CO (g) + C₂FeO₂ (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	122. ± 24.	kJ/mol	FA-SIFT	Sunderlin, Wang, et al., 1992	MS
Δ_rH°	105.	kJ/mol	N/A	Venkataraman, Bandukwalla, et al., 1989	Method: Velocity distributions of photofragments from Fe(CO)5.; MS
Δ_rH°	137. ± 29.	kJ/mol	N/A	Engelking and Lineberger, 1979	Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

CFeO (g) = Carbon monoxide (g) + (g)

By formula: CFeO (g) = CO (g) + Fe (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	35. ± 15.	kJ/mol	FA-SIFT	Sunderlin, Wang, et al., 1992	MS
Δ_rH°	<163.	kJ/mol	N/A	Venkataraman, Bandukwalla, et al., 1989	Method: Velocity distributions of photofragments from Fe(CO)5.; MS
Δ_rH°	87. ± 29.	kJ/mol	N/A	Engelking and Lineberger, 1979	Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

C₄FeO₄ (g) = C₃FeO₃ (g) + Carbon monoxide (g)

By formula: C₄FeO₄ (g) = C₃FeO₃ (g) + CO (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	117. ± 36.	kJ/mol	FA-SIFT	Sunderlin, Wang, et al., 1992	MS
Δ_rH°	42.	kJ/mol	N/A	Venkataraman, Bandukwalla, et al., 1989	Method: Velocity distributions of photofragments from Fe(CO)5.; MS
Δ_rH°	19. ± 39.	kJ/mol	N/A	Engelking and Lineberger, 1979	Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

(solution) = C₃NiO₃ (solution) + Carbon monoxide (solution)

By formula: C₄NiO₄ (solution) = C₃NiO₃ (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	94.6	kJ/mol	KinS	Turner, Simpson, et al., 1983	solvent: Liquid krypton; The reaction enthalpy relies on the experimental value for the activation enthalpy, 94.6 kJ/mol, and on the assumption that the activation enthalpy for product recombination is negligible Turner, Simpson, et al., 1983.; MS

(CAS Reg. No. 71564-27-7 • 4294967295 Carbon monoxide ) + = CAS Reg. No. 71564-27-7

By formula: (CAS Reg. No. 71564-27-7 • 4294967295CO) + CO = CAS Reg. No. 71564-27-7

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	145. ± 40.	kJ/mol	N/A	Nakajima, Taguwa, et al., 1994	gas phase; Vertical Detachment Energy: 3.02±0.13 eV; B
Δ_rH°	150. ± 50.	kJ/mol	N/A	Engelking and Lineberger, 1979	gas phase; B
Δ_rH°	174. ± 10.	kJ/mol	CIDT	Sunderlin, Wang, et al., 1992	gas phase; Affinity: CO..Fe(CO)3-; B

= + Carbon monoxide

By formula: C₁₅H₁₀O = C₁₄H₁₀ + CO

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-28. ± 5.0	kJ/mol	Cpha	Hung and Grabowski, 1992	liquid phase; solvent: Alkane; ALS
Δ_rH°	18. ± 10.	kJ/mol	Cpha	Herman and Goodman, 1989	solid phase; solvent: Acetonitrile/water; ALS
Δ_rH°	-41. ± 12.	kJ/mol	Cpha	Grabowski, Simon, et al., 1984	liquid phase; solvent: Benzene; ALS

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (CHO⁺ • 2CO) + CO = (CHO⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	26.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	66.1	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	110.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (CHO⁺ • 3CO) + CO = (CHO⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	26.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	76.1	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	120.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

( • 4 Carbon monoxide ) + = ( • 5)

By formula: (CHO⁺ • 4CO) + CO = (CHO⁺ • 5CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	24.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	95.8	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	130.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

( • Carbon monoxide ) + = ( • 2)

By formula: (CHO⁺ • CO) + CO = (CHO⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	20. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	28.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	62.8	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	100.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

CNiO (g) = Carbon monoxide (g) + (g)

By formula: CNiO (g) = CO (g) + Ni (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	170. ± 24.	kJ/mol	FA-SIFT	Sunderlin, Wang, et al., 1992	MS
Δ_rH°	108.	kJ/mol	N/A	McQuaid, Morris, et al., 1988	Method: Chemiluminescence spectroscopy.; MS
Δ_rH°	121. ± 63.	kJ/mol	N/A	Stevens, Feigerle, et al., 1982	Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

( • Carbon monoxide ) + = ( • 2)

By formula: (Co⁺ • CO) + CO = (Co⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	153. ± 9.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
152. (+8.8,-0.)		CID	Goebel, Haynes, et al., 1995	gas phase; guided ion beam CID; M
138. (+20.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

+ Carbon monoxide = ( • )

By formula: Fe⁺ + CO = (Fe⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	129. ± 4.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	130. ± 10.	kJ/mol	MKER	Carpenter, van Koppen, et al., 1995	gas phase; determined from MKER and theory; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
131. (+7.9,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

(solution) + Carbon monoxide (solution) = (solution)

By formula: C₆H₃MnO₅ (solution) + CO (solution) = C₇H₃MnO₆ (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-56.1 ± 4.2	kJ/mol	RSC	Nolan, López de la Vega, et al., 1986	solvent: Tetrahydrofuran; MS
Δ_rH°	-52.7	kJ/mol	EqS	Calderazzo, 1977	solvent: 2,2'-diethoxydiethyl ether; MS

(g) = 0.5 (g) + 4 Carbon monoxide (g) + (cr)

By formula: C₄HCoO₄ (g) = 0.5H₂ (g) + 4CO (g) + Co (cr)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	127.1 ± 2.1	kJ/mol	EqG	Bronshstein, Gankin, et al., 1966	Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. Temperature range: ca. 423-533 K; MS

( • Carbon monoxide ) + = ( • 2)

By formula: (Na⁺ • CO) + CO = (Na⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	24. ± 3.	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	24. ± 3.	kJ/mol	CIDT	Walter, Sievers, et al., 1998	RCD
Δ_rH°	31.	kJ/mol	HPMS	Castleman, Peterson, et al., 1983	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	63.2	J/mol*K	HPMS	Castleman, Peterson, et al., 1983	gas phase; M

(solution) + (solution) = C₁₀H₅NO₅W (solution) + Carbon monoxide (solution)

By formula: C₆O₆W (solution) + C₄H₄N₂ (solution) = C₁₀H₅NO₅W (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	27.4 ± 2.9	kJ/mol	PC	Nakashima and Adamson, 1982	solvent: Cyclohexane; MS
Δ_rH°	24.9 ± 2.9	kJ/mol	PC	Nakashima and Adamson, 1982	solvent: Benzene; MS
Δ_rH°	18.4 ± 0.4	kJ/mol	PC	Nakashima and Adamson, 1982	solvent: Tetrahydrofuran; MS

+ Carbon monoxide = ( • )

By formula: Na⁺ + CO = (Na⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	32. ± 7.9	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	32. ± 7.9	kJ/mol	CIDT	Walter, Sievers, et al., 1998	RCD
Δ_rH°	52.7	kJ/mol	HPMS	Castleman, Peterson, et al., 1983	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	85.4	J/mol*K	HPMS	Castleman, Peterson, et al., 1983	gas phase; M

(g) = C₃NiO₃ (g) + Carbon monoxide (g)

By formula: C₄NiO₄ (g) = C₃NiO₃ (g) + CO (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	104. ± 8.	kJ/mol	N/A	Stevens, Feigerle, et al., 1982	Please also see Compton and Stockdale, 1976. The enthalpy of formation relies on -602.5 ± 2.6 kJ/mol for the enthalpy of formation of Ni(CO)4(g) Method: LPS and collision with low energy electrons.; MS

(CO⁺ • 2 Carbon monoxide ) + = (CO⁺ • 3)

By formula: (CO⁺ • 2CO) + CO = (CO⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	30.2	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers, at low and high temperatures; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	103.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers, at low and high temperatures; M

(CO⁺ • 5 Carbon monoxide ) + = (CO⁺ • 6)

By formula: (CO⁺ • 5CO) + CO = (CO⁺ • 6CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.3	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers, at low and high temperatures; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.9	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers, at low and high temperatures; M

C₃₄H₅₂OTh (solution) + Carbon monoxide (solution) = C₃₅H₅₂O₂Th (solution)

By formula: C₃₄H₅₂OTh (solution) + CO (solution) = C₃₅H₅₂O₂Th (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-24.7 ± 6.3	kJ/mol	EqS	Moloy and Marks, 1984	solvent: Toluene; Temperature range: ca. 180-200 K; MS

C₂₉H₅₀OTh (solution) + Carbon monoxide (solution) = C₃₀H₅₀O₂Th (solution)

By formula: C₂₉H₅₀OTh (solution) + CO (solution) = C₃₀H₅₀O₂Th (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-18.8 ± 3.8	kJ/mol	EqS	Moloy and Marks, 1984	solvent: Toluene; Temperature range: ca. 180-220 K; MS

(cr) = 6 Carbon monoxide (g) + (cr)

By formula: C₆MoO₆ (cr) = 6CO (g) + Mo (cr)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	325.9 ± 1.5	kJ/mol	TD-HZC	Barnes, Pilcher, et al., 1974, 2	Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977.; MS
Δ_rH°	297.1 ± 4.2	kJ/mol	TD-HFC	Connor, Skinner, et al., 1972	Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977.; MS

( • 14 Carbon monoxide ) + = ( • 15)

By formula: (CHO⁺ • 14CO) + CO = (CHO⁺ • 15CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.36	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	96.	J/mol*K	N/A	Hiraoka and Mori, 1989	gas phase; Entropy change calculated or estimated; M

(solution) + Carbon monoxide (solution) = C₁₁H₁₀CrO (solution)

By formula: C₁₀H₁₀Cr (solution) + CO (solution) = C₁₁H₁₀CrO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-78.7 ± 2.1	kJ/mol	EqS	Wong and Brintzinger, 1975	solvent: Toluene; Temperature range: 280-308 K; MS

(cr) = 6 Carbon monoxide (g) + (cr)

By formula: C₆CrO₆ (cr) = 6CO (g) + Cr (cr)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	266. ± 4.	kJ/mol	TD-HFC	Al-Takhin, Connor, et al., 1984, 2	MS
Δ_rH°	314.9 ± 0.9	kJ/mol	TD-HZC	Pittam, Pilcher, et al., 1975	Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977.; MS
Δ_rH°	269.4 ± 4.7	kJ/mol	TD-HFC	Connor, Skinner, et al., 1972	MS

2 (solution) = C₁₂Co₄O₁₂ (solution) + 4 Carbon monoxide (solution)

By formula: 2C₈Co₂O₈ (solution) = C₁₂Co₄O₁₂ (solution) + 4CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	123.4 ± 2.1	kJ/mol	EqS	Bor and Dietler, 1980	solvent: Hexane; Temperature range: 378-418 K; MS

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Ion clustering data, IR Spectrum, References, Notes

Data evaluated as indicated in comments:
HL - Edward P. Hunter and Sharon G. Lias
L - Sharon G. Lias

Data compiled as indicated in comments:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron
B - John E. Bartmess

View reactions leading to CO⁺ (ion structure unspecified)

Quantity	Value	Units	Method	Reference	Comment
IE (evaluated)	14.014 ± 0.0003	eV	N/A	N/A	L
Quantity	Value	Units	Method	Reference	Comment
Proton affinity (review)	594.	kJ/mol	N/A	Hunter and Lias, 1998	at C; HL
Proton affinity (review)	426.3	kJ/mol	N/A	Hunter and Lias, 1998	at O; HL
Quantity	Value	Units	Method	Reference	Comment
Gas basicity	562.8	kJ/mol	N/A	Hunter and Lias, 1998	at C; HL
Gas basicity	402.2	kJ/mol	N/A	Hunter and Lias, 1998	at O; HL
Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_{(+) ion}	1241.	kJ/mol	N/A	N/A
Quantity	Value	Units	Method	Reference	Comment
Δ_fH_{(+) ion,0K}	1238.	kJ/mol	N/A	N/A

Electron affinity determinations

EA (eV)	Method	Reference	Comment
1.32608	R-A	Refaey and Franklin, 1976	G3MP2B3 calculations indicate an EA of ca.-1.6 eV, anion unbound; B

Ionization energy determinations

IE (eV)	Method	Reference	Comment
14.0142 ± 0.0003	LS	Erman, Karawajczyk, et al., 1993	LL
14.1	PE	Kimura, Katsumata, et al., 1981	LLK
14.014	S	Fock, Gurtler, et al., 1980	LLK
14.07 ± 0.05	EI	Hille and Mark, 1978	LLK
14.0	PI	Rabalais, Debies, et al., 1974	LLK
14.01	PE	Natalis, 1973	LLK
14.0139	S	Ogawa and Ogawa, 1972	LLK
14.01	PE	Hotop and Niehaus, 1970	RDSH
14.01	PE	Collin and Natalis, 1969	RDSH
14.00	PE	Turner and May, 1966	RDSH
14.013 ± 0.004	S	Krupenie, 1966	RDSH
13.985	PI	Cook, Metzger, et al., 1965	RDSH
14.01	PE	Potts and Williams, 1974	Vertical value; LLK
14.01	PE	Katrib, Debies, et al., 1973	Vertical value; LLK
14.0	PE	Thomas, 1970	Vertical value; RDSH

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
C⁺	20.94 ± 0.02	O^-	PI	Oertel, Schenk, et al., 1980	LLK
C⁺	20.89	O^-(2P)	EI	Smyth, Schiavone, et al., 1974	LLK
C⁺	20.88 ± 0.02	O^-	EI	Locht and Momigny, 1971	LLK
C⁺	22.45 ± 0.10	O	EI	Hierl and Franklin, 1967	RDSH
C⁺	20.82 ± 0.05	O^-	EI	Hierl and Franklin, 1967	RDSH
C⁺	22.57 ± 0.20	O	EI	Fineman and Petrocelli, 1961	RDSH
C⁺	20.89 ± 0.09	O^-	EI	Fineman and Petrocelli, 1961	RDSH
CO⁺	19.5 ± 0.2	O^-?	PI	Weissler, Samson, et al., 1959	RDSH
O⁺	23.44	C^-	EI	Smyth, Schiavone, et al., 1974	LLK
O⁺	23.20 ± 0.05	C^-	EI	Hierl and Franklin, 1967	RDSH
O⁺	24.65 ± 0.05	C	EI	Hierl and Franklin, 1967	RDSH
O⁺	23.41 ± 0.17	C^-	EI	Fineman and Petrocelli, 1961	RDSH
O⁺	24.78 ± 0.23	C	EI	Fineman and Petrocelli, 1961	RDSH

Ion clustering data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, IR Spectrum, References, Notes

Data compiled as indicated in comments:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
B - John E. Bartmess
RCD - Robert C. Dunbar

Note: Please consider using the reaction search for this species. This page allows searching of all reactions involving this species. Searches may be limited to ion clustering reactions. A general reaction search form is also available.

Clustering reactions

+ Carbon monoxide = ( • )

By formula: Ag⁺ + CO = (Ag⁺ • CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
88.7 (+5.0,-0.)		CID	Meyer, Chen, et al., 1995	gas phase; guided ion beam CID; M

( • Carbon monoxide ) + = ( • 2)

By formula: (Ag⁺ • CO) + CO = (Ag⁺ • 2CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
109. (+4.,-0.)		CID	Meyer, Chen, et al., 1995	gas phase; guided ion beam CID; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Ag⁺ • 2CO) + CO = (Ag⁺ • 3CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
54.8 (+7.5,-0.)		CID	Meyer, Chen, et al., 1995	gas phase; guided ion beam CID; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (Ag⁺ • 3CO) + CO = (Ag⁺ • 4CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
45. (+4.,-0.)		CID	Meyer, Chen, et al., 1995	gas phase; guided ion beam CID; M

Ar⁺ + Carbon monoxide = (Ar⁺ • )

By formula: Ar⁺ + CO = (Ar⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	80. ± 20.	kJ/mol	PIPECO	Norwood, Guo, et al., 1989	gas phase; Ar+(2P3/2); M

(Ar⁺ • Carbon monoxide ) + = (Ar⁺ • 2)

By formula: (Ar⁺ • CO) + CO = (Ar⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.	kJ/mol	PIPECO	Norwood, Guo, et al., 1989	gas phase; approximate value from Ar+(2P3/2) 2CO -> Ar+(2P3/2) + 2CO; M

+ Carbon monoxide = ( • )

By formula: CF₃⁺ + CO = (CF₃⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.9	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	130.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • Carbon monoxide ) + = ( • 2)

By formula: (CF₃⁺ • CO) + CO = (CF₃⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	26.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (CF₃⁺ • 2CO) + CO = (CF₃⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	24.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	110.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (CF₃⁺ • 3CO) + CO = (CF₃⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	23.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	120.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • 4 Carbon monoxide ) + = ( • 5)

By formula: (CF₃⁺ • 4CO) + CO = (CF₃⁺ • 5CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	110.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • 5 Carbon monoxide ) + = ( • 6)

By formula: (CF₃⁺ • 5CO) + CO = (CF₃⁺ • 6CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	120.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • 6 Carbon monoxide ) + = ( • 7)

By formula: (CF₃⁺ • 6CO) + CO = (CF₃⁺ • 7CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	120.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

(CFeO^- • 4294967295 Carbon monoxide ) + = CFeO^-

By formula: (CFeO^- • 4294967295CO) + CO = CFeO^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	146. ± 15.	kJ/mol	N/A	Villalta and Leopold, 1993	gas phase; B
Δ_rH°	141. ± 15.	kJ/mol	CIDT	Sunderlin, Wang, et al., 1992	gas phase; B

+ Carbon monoxide = ( • )

By formula: CHO⁺ + CO = (CHO⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	45.2	kJ/mol	PHPMS	Jennings, Headley, et al., 1982	gas phase; M
Δ_rH°	53.6	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Δ_rH°	49.0	kJ/mol	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	94.1	J/mol*K	PHPMS	Jennings, Headley, et al., 1982	gas phase; M
Δ_rS°	100.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Δ_rS°	87.4	J/mol*K	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; M

( • Carbon monoxide ) + = ( • 2)

By formula: (CHO⁺ • CO) + CO = (CHO⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	20. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	28.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	62.8	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	100.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (CHO⁺ • 2CO) + CO = (CHO⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	26.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	66.1	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	110.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (CHO⁺ • 3CO) + CO = (CHO⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	26.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	76.1	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	120.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

( • 4 Carbon monoxide ) + = ( • 5)

By formula: (CHO⁺ • 4CO) + CO = (CHO⁺ • 5CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	24.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	95.8	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	130.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

( • 5 Carbon monoxide ) + = ( • 6)

By formula: (CHO⁺ • 5CO) + CO = (CHO⁺ • 6CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.5	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

( • 6 Carbon monoxide ) + = ( • 7)

By formula: (CHO⁺ • 6CO) + CO = (CHO⁺ • 7CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	88.3	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

( • 7 Carbon monoxide ) + = ( • 8)

By formula: (CHO⁺ • 7CO) + CO = (CHO⁺ • 8CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	92.0	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

( • 8 Carbon monoxide ) + = ( • 9)

By formula: (CHO⁺ • 8CO) + CO = (CHO⁺ • 9CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	94.6	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

( • 9 Carbon monoxide ) + = ( • 10)

By formula: (CHO⁺ • 9CO) + CO = (CHO⁺ • 10CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	93.3	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

( • 10 Carbon monoxide ) + = ( • 11)

By formula: (CHO⁺ • 10CO) + CO = (CHO⁺ • 11CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	96.2	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

( • 11 Carbon monoxide ) + = ( • 12)

By formula: (CHO⁺ • 11CO) + CO = (CHO⁺ • 12CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	97.1	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

( • 12 Carbon monoxide ) + = ( • 13)

By formula: (CHO⁺ • 12CO) + CO = (CHO⁺ • 13CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	97.1	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

( • 13 Carbon monoxide ) + = ( • 14)

By formula: (CHO⁺ • 13CO) + CO = (CHO⁺ • 14CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	96.7	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

( • 14 Carbon monoxide ) + = ( • 15)

By formula: (CHO⁺ • 14CO) + CO = (CHO⁺ • 15CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.36	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	96.	J/mol*K	N/A	Hiraoka and Mori, 1989	gas phase; Entropy change calculated or estimated; M

(CHO^- • 4294967295 Carbon monoxide ) + = CHO^-

By formula: (CHO^- • 4294967295CO) + CO = CHO^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	22.7 ± 1.9	kJ/mol	N/A	Murray, Miller, et al., 1986	gas phase; B

(CNiO^- • 4294967295 Carbon monoxide ) + = CNiO^-

By formula: (CNiO^- • 4294967295CO) + CO = CNiO^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	138. ± 24.	kJ/mol	N/A	Stevens, Feigerle, et al., 1982	gas phase; B
Δ_rH°	136. ± 24.	kJ/mol	CIDT	Sunderlin, Wang, et al., 1992	gas phase; Affinity: CO..Ni-; B

CO⁺ + Carbon monoxide = (CO⁺ • )

By formula: CO⁺ + CO = (CO⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	67.	kJ/mol	PIPECO	Norwood, Guo, et al., 1988	gas phase; CO+ in state B, Δ_rH>; M
Δ_rH°	93.7	kJ/mol	PI	Linn, Ono, et al., 1981	gas phase; M
Δ_rH°	120. ± 30.	kJ/mol	EI	Munson and Franlin, 1962	gas phase; from IP'switching reaction and heats of formation; M
Δ_rH°	106.	kJ/mol	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; Δ_rH>, DG>; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.	J/mol*K	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; Δ_rH>, DG>; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
21.	340.	HPMS	Chong and Franklin, 1971	gas phase; equilibrium uncertain; M
48.1	695.	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; Δ_rH>, DG>; M

(CO⁺ • Carbon monoxide ) + = (CO⁺ • 2)

By formula: (CO⁺ • CO) + CO = (CO⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	52.3	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; M
Δ_rH°	15.	kJ/mol	PI	Linn, Ono, et al., 1981	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	149.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; M

(CO⁺ • 2 Carbon monoxide ) + = (CO⁺ • 3)

By formula: (CO⁺ • 2CO) + CO = (CO⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	30.2	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers, at low and high temperatures; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	103.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers, at low and high temperatures; M

(CO⁺ • 3 Carbon monoxide ) + = (CO⁺ • 4)

By formula: (CO⁺ • 3CO) + CO = (CO⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18.4	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	85.8	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers; M

(CO⁺ • 4 Carbon monoxide ) + = (CO⁺ • 5)

By formula: (CO⁺ • 4CO) + CO = (CO⁺ • 5CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17.8	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	102.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers; M

(CO⁺ • 5 Carbon monoxide ) + = (CO⁺ • 6)

By formula: (CO⁺ • 5CO) + CO = (CO⁺ • 6CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.3	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers, at low and high temperatures; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.9	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; two isomers, at low and high temperatures; M

(CO⁺ • 6 Carbon monoxide ) + = (CO⁺ • 7)

By formula: (CO⁺ • 6CO) + CO = (CO⁺ • 7CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.41	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; break in the van't Hoff plot; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	88.3	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; break in the van't Hoff plot; M

(CO⁺ • 7 Carbon monoxide ) + = (CO⁺ • 8)

By formula: (CO⁺ • 7CO) + CO = (CO⁺ • 8CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.61	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; break in the van't Hoff plot; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	51.9	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; break in the van't Hoff plot; M

(CO⁺ • 9 Carbon monoxide ) + = (CO⁺ • 10)

By formula: (CO⁺ • 9CO) + CO = (CO⁺ • 10CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.74	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.9	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; M

(CO⁺ • 11 Carbon monoxide ) + = (CO⁺ • 12)

By formula: (CO⁺ • 11CO) + CO = (CO⁺ • 12CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.91	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	113.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; M

(CO⁺ • 12 Carbon monoxide ) + = (CO⁺ • 13)

By formula: (CO⁺ • 12CO) + CO = (CO⁺ • 13CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.79	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	116.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; M

(CO⁺ • 13 Carbon monoxide ) + = (CO⁺ • 14)

By formula: (CO⁺ • 13CO) + CO = (CO⁺ • 14CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.70	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	120.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; M

(CO⁺ • 14 Carbon monoxide ) + = (CO⁺ • 15)

By formula: (CO⁺ • 14CO) + CO = (CO⁺ • 15CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.03	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	112.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; M

(CO⁺ • 15 Carbon monoxide ) + = (CO⁺ • 16)

By formula: (CO⁺ • 15CO) + CO = (CO⁺ • 16CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.03	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	115.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; M

(CO⁺ • 16 Carbon monoxide ) + = (CO⁺ • 17)

By formula: (CO⁺ • 16CO) + CO = (CO⁺ • 17CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.87	kJ/mol	PHPMS	Hiraoka and Mori, 1991	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	115.	J/mol*K	PHPMS	Hiraoka and Mori, 1991	gas phase; M

COPt₃^- + Carbon monoxide = C₂O₂Pt₃^-

By formula: COPt₃^- + CO = C₂O₂Pt₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	220. ± 50.	kJ/mol	N/A	Grushow and Ervin, 1997	gas phase; B

C₂O₂Pt₃^- + Carbon monoxide = C₃O₃Pt₃^-

By formula: C₂O₂Pt₃^- + CO = C₃O₃Pt₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	220. ± 22.	kJ/mol	N/A	Grushow and Ervin, 1997	gas phase; B
Δ_rH°	206. ± 14.	kJ/mol	PDis	Shi, Spasov, et al., 2001	gas phase; B

C₃CrO₃^- + Carbon monoxide = (C₃CrO₃^- • )

By formula: C₃CrO₃^- + CO = (C₃CrO₃^- • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	166. ± 16.	kJ/mol	CIDT	Sunderlin, Wang, et al., 1993	gas phase; B

C₃MnO₃^- + Carbon monoxide = C₄MnO₄^-

By formula: C₃MnO₃^- + CO = C₄MnO₄^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	172. ± 13.	kJ/mol	CIDT	Sunderlin, Wang, et al., 1993	gas phase; B

C₃O₃Pt₃^- + Carbon monoxide = C₄O₄Pt₃^-

By formula: C₃O₃Pt₃^- + CO = C₄O₄Pt₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	102. ± 13.	kJ/mol	N/A	Grushow and Ervin, 1997	gas phase; B

C₃O₃V^- + Carbon monoxide = C₄O₄V^-

By formula: C₃O₃V^- + CO = C₄O₄V^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	169. ± 24.	kJ/mol	CIDT	Sunderlin, Wang, et al., 1993	gas phase; B

C₄O₄Pt₃^- + Carbon monoxide = C₅O₅Pt₃^-

By formula: C₄O₄Pt₃^- + CO = C₅O₅Pt₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	109. ± 18.	kJ/mol	N/A	Grushow and Ervin, 1997	gas phase; B

C₄O₄V^- + Carbon monoxide = C₅O₅V^-

By formula: C₄O₄V^- + CO = C₅O₅V^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	130. ± 13.	kJ/mol	CIDT	Sunderlin, Wang, et al., 1993	gas phase; B

C₅O₅Pt₃^- + Carbon monoxide = C₆O₆Pt₃^-

By formula: C₅O₅Pt₃^- + CO = C₆O₆Pt₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	174. ± 29.	kJ/mol	N/A	Grushow and Ervin, 1997	gas phase; B
Δ_rH°	166. ± 14.	kJ/mol	PDis	Shi, Spasov, et al., 2001	gas phase; B

C₅O₅V^- + Carbon monoxide = C₆O₆V^-

By formula: C₅O₅V^- + CO = C₆O₆V^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	129. ± 15.	kJ/mol	CIDT	Sunderlin, Wang, et al., 1993	gas phase; B

C₆H₅MnO^- + Carbon monoxide = C₆H₅MnO^-

By formula: C₆H₅MnO^- + CO = C₆H₅MnO^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	20.9 ± 2.1	kJ/mol	N/A	Sunderlin and Squires, 1999	gas phase; B

C₆H₅MnO^- + Carbon monoxide = C₇H₅MnO₂^-

By formula: C₆H₅MnO^- + CO = C₇H₅MnO₂^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	32.6 ± 2.5	kJ/mol	N/A	Sunderlin and Squires, 1999	gas phase; B

C₆O₆Pt₄^- + Carbon monoxide = C₈O₈Pt₄^-

By formula: C₆O₆Pt₄^- + CO = C₈O₈Pt₄^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	77. ± 29.	kJ/mol	N/A	Grushow and Ervin, 1997	gas phase; B

C₇H₅CrO₂^- + Carbon monoxide = C₈H₅CrO₃^-

By formula: C₇H₅CrO₂^- + CO = C₈H₅CrO₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	36.4 ± 3.3	kJ/mol	N/A	Sunderlin and Squires, 1999	gas phase; B

C₇H₅O₂V^- + Carbon monoxide = C₇H₅O₂V^-

By formula: C₇H₅O₂V^- + CO = C₇H₅O₂V^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	33.1 ± 2.9	kJ/mol	N/A	Sunderlin and Squires, 1999	gas phase; B

C₇H₅O₂V^- + Carbon monoxide = C₈H₅O₃V^-

By formula: C₇H₅O₂V^- + CO = C₈H₅O₃V^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	31.8 ± 2.5	kJ/mol	N/A	Sunderlin and Squires, 1999	gas phase; B

+ Carbon monoxide = ( • )

By formula: Co⁺ + CO = (Co⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	174. ± 7.1	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	160. ± 10.	kJ/mol	MKER	Carpenter, van Koppen, et al., 1995	gas phase; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
174. (+6.7,-0.)		CID	Goebel, Haynes, et al., 1995	gas phase; guided ion beam CID; M
163. (+20.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • Carbon monoxide ) + = ( • 2)

By formula: (Co⁺ • CO) + CO = (Co⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	153. ± 9.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
152. (+8.8,-0.)		CID	Goebel, Haynes, et al., 1995	gas phase; guided ion beam CID; M
138. (+20.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Co⁺ • 2CO) + CO = (Co⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	82. ± 12.	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
82. (+12.,-0.)		CID	Goebel, Haynes, et al., 1995	gas phase; guided ion beam CID; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (Co⁺ • 3CO) + CO = (Co⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	74.9 ± 5.9	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
75.3 (+5.9,-0.)		CID	Goebel, Haynes, et al., 1995	gas phase; guided ion beam CID; M

( • 4 Carbon monoxide ) + = ( • 5)

By formula: (Co⁺ • 4CO) + CO = (Co⁺ • 5CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	74.9 ± 5.0	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
75.3 (+5.0,-0.)		CID	Goebel, Haynes, et al., 1995	gas phase; guided ion beam CID; M

+ Carbon monoxide = ( • )

By formula: Cr⁺ + CO = (Cr⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	90. ± 4.	kJ/mol	CIDT	Khan, Clemmer, et al., 1993	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
90.0 (+4.2,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • Carbon monoxide ) + = ( • 2)

By formula: (Cr⁺ • CO) + CO = (Cr⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	95. ± 3.	kJ/mol	CIDT	Khan, Clemmer, et al., 1993	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
95. (+3.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Cr⁺ • 2CO) + CO = (Cr⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	54.0 ± 5.9	kJ/mol	CIDT	Khan, Clemmer, et al., 1993	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
54.0 (+5.9,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (Cr⁺ • 3CO) + CO = (Cr⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	51.0 ± 7.5	kJ/mol	CIDT	Khan, Clemmer, et al., 1993	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
51.0 (+7.9,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 4 Carbon monoxide ) + = ( • 5)

By formula: (Cr⁺ • 4CO) + CO = (Cr⁺ • 5CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	62. ± 3.	kJ/mol	CIDT	Khan, Clemmer, et al., 1993	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
62. (+3.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 5 Carbon monoxide ) + = ( • 6)

By formula: (Cr⁺ • 5CO) + CO = (Cr⁺ • 6CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
130. (+7.9,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

+ Carbon monoxide = ( • )

By formula: Cu⁺ + CO = (Cu⁺ • CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
149. (+6.7,-0.)		CID	Meyer, Chen, et al., 1995	gas phase; guided ion beam CID; M

( • Carbon monoxide ) + = ( • 2)

By formula: (Cu⁺ • CO) + CO = (Cu⁺ • 2CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
172. (+3.,-0.)		CID	Meyer, Chen, et al., 1995	gas phase; guided ion beam CID; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Cu⁺ • 2CO) + CO = (Cu⁺ • 3CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
75. (+4.,-0.)		CID	Meyer, Chen, et al., 1995	gas phase; guided ion beam CID; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (Cu⁺ • 3CO) + CO = (Cu⁺ • 4CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
53. (+3.,-0.)		CID	Meyer, Chen, et al., 1995	gas phase; guided ion beam CID; M

+ Carbon monoxide = ( • )

By formula: Fe⁺ + CO = (Fe⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	129. ± 4.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	130. ± 10.	kJ/mol	MKER	Carpenter, van Koppen, et al., 1995	gas phase; determined from MKER and theory; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
131. (+7.9,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • Carbon monoxide ) + = ( • 2)

By formula: (Fe⁺ • CO) + CO = (Fe⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	148. ± 5.0	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
151. (+14.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Fe⁺ • 2CO) + CO = (Fe⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	69.0 ± 5.9	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
66.1 (+5.0,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (Fe⁺ • 3CO) + CO = (Fe⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	97.9 ± 5.9	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
103. (+7.1,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 4 Carbon monoxide ) + = ( • 5)

By formula: (Fe⁺ • 4CO) + CO = (Fe⁺ • 5CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	97.1 ± 4.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
112. (+4.2,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 3 Carbon monoxide • 2) + = ( • 4 • 2)

By formula: (Fe⁺ • 3CO • 2Fe) + CO = (Fe⁺ • 4CO • 2Fe)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	238.	kJ/mol	PDiss	Tecklenberg, Bricker, et al., 1988	gas phase; Δ_rH<; M

( • ) + Carbon monoxide = ( • • )

By formula: (Fe⁺ • Fe) + CO = (Fe⁺ • CO • Fe)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	245.	kJ/mol	PDiss	Tecklenberg, Bricker, et al., 1988	gas phase; Δ_rH<; M

+ Carbon monoxide = ( • )

By formula: K⁺ + CO = (K⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18. ± 5.0	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

Kr⁺ + Carbon monoxide = (Kr⁺ • )

By formula: Kr⁺ + CO = (Kr⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	103. ± 7.5	kJ/mol	SIFT	Praxmarer, Jordan, et al., 1993	gas phase; switching reaction(Kr+)Kr; Wadt, 1978, Radzig and Smirnov, 1985; M

+ Carbon monoxide = ( • )

By formula: Li⁺ + CO = (Li⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	55. ± 13.	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	55. ± 12.	kJ/mol	CIDT	Walter, Sievers, et al., 1998	RCD

( • Carbon monoxide ) + = ( • 2)

By formula: (Li⁺ • CO) + CO = (Li⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	36. ± 4.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	36. ± 4.2	kJ/mol	CIDT	Walter, Sievers, et al., 1998	RCD

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Li⁺ • 2CO) + CO = (Li⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	35. ± 4.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	35. ± 4.2	kJ/mol	CIDT	Walter, Sievers, et al., 1998	RCD

+ Carbon monoxide = ( • )

By formula: Mg⁺ + CO = (Mg⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	41. ± 5.9	kJ/mol	CIDT	Andersen, Muntean, et al., 2000	RCD

( • Carbon monoxide ) + = ( • 2)

By formula: (Mg⁺ • CO) + CO = (Mg⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	38. ± 3.	kJ/mol	CIDT	Andersen, Muntean, et al., 2000	RCD

+ Carbon monoxide = ( • )

By formula: Mn⁺ + CO = (Mn⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	30.	kJ/mol	KERDS	Dearden, Hayashibara, et al., 1989	gas phase; Δ_rH>; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
25. (+10.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • Carbon monoxide ) + = ( • 2)

By formula: (Mn⁺ • CO) + CO = (Mn⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	100.	kJ/mol	KERDS	Dearden, Hayashibara, et al., 1989	gas phase; Δ_rH<; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
63. (+10.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Mn⁺ • 2CO) + CO = (Mn⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	130. ± 30.	kJ/mol	KERDS	Dearden, Hayashibara, et al., 1989	gas phase; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
74. (+10.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (Mn⁺ • 3CO) + CO = (Mn⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	80. ± 10.	kJ/mol	KERDS	Dearden, Hayashibara, et al., 1989	gas phase; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
65. (+10.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 4 Carbon monoxide ) + = ( • 5)

By formula: (Mn⁺ • 4CO) + CO = (Mn⁺ • 5CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	70. ± 10.	kJ/mol	KERDS	Dearden, Hayashibara, et al., 1989	gas phase; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
121. (+10.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 5 Carbon monoxide ) + = ( • 6)

By formula: (Mn⁺ • 5CO) + CO = (Mn⁺ • 6CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	130. ± 20.	kJ/mol	KERDS	Dearden, Hayashibara, et al., 1989	gas phase; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
142. (+10.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

+ Carbon monoxide = ( • )

By formula: Na⁺ + CO = (Na⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	32. ± 7.9	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	32. ± 7.9	kJ/mol	CIDT	Walter, Sievers, et al., 1998	RCD
Δ_rH°	52.7	kJ/mol	HPMS	Castleman, Peterson, et al., 1983	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	85.4	J/mol*K	HPMS	Castleman, Peterson, et al., 1983	gas phase; M

( • Carbon monoxide ) + = ( • 2)

By formula: (Na⁺ • CO) + CO = (Na⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	24. ± 3.	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD
Δ_rH°	24. ± 3.	kJ/mol	CIDT	Walter, Sievers, et al., 1998	RCD
Δ_rH°	31.	kJ/mol	HPMS	Castleman, Peterson, et al., 1983	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	63.2	J/mol*K	HPMS	Castleman, Peterson, et al., 1983	gas phase; M

+ Carbon monoxide = ( • )

By formula: Ni⁺ + CO = (Ni⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	160. ± 10.	kJ/mol	MKER	Carpenter, van Koppen, et al., 1995	gas phase; determined from MKER and theory; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
174. (+10.,-0.)		CID	Khan, Steele, et al., 1995	gas phase; guided ion beam CID; M
178. (+9.2,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • Carbon monoxide ) + = ( • 2)

By formula: (Ni⁺ • CO) + CO = (Ni⁺ • 2CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
168. (+10.,-0.)		CID	Khan, Steele, et al., 1995	gas phase; guided ion bema CID; M
169. (+9.2,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Ni⁺ • 2CO) + CO = (Ni⁺ • 3CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
91.6 (+5.9,-0.)		CID	Khan, Steele, et al., 1995	gas phase; guided ion beam CID; M
95.0 (+4.2,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (Ni⁺ • 3CO) + CO = (Ni⁺ • 4CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
72. (+3.,-0.)		CID	Khan, Steele, et al., 1995	gas phase; guided ion beam CID; M
72.0 (+5.0,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

+ Carbon monoxide = ( • )

By formula: O₂^- + CO = (O₂^- • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	<56.90	kJ/mol	IMRB	Adams and Bohme, 1970	gas phase; CO..O₂^- + O₂ -> O₄^- + CO. G3MP2B3 calculations indicate a HOF(A-) ca. -38 kcal/mol; B

+ Carbon monoxide = ( • )

By formula: Pt⁺ + CO = (Pt⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	212. ± 10.	kJ/mol	CIDT	Zhang and Armentrout, 2001	RCD

( • Carbon monoxide ) + = ( • 2)

By formula: (Pt⁺ • CO) + CO = (Pt⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	193. ± 10.	kJ/mol	CIDT	Zhang and Armentrout, 2001	RCD

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Pt⁺ • 2CO) + CO = (Pt⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	97.9 ± 5.0	kJ/mol	CIDT	Zhang and Armentrout, 2001	RCD

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (Pt⁺ • 3CO) + CO = (Pt⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	53.1 ± 5.0	kJ/mol	CIDT	Zhang and Armentrout, 2001	RCD

Pt₃^- + Carbon monoxide = COPt₃^-

By formula: Pt₃^- + CO = COPt₃^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	222. ± 29.	kJ/mol	N/A	Grushow and Ervin, 1997	gas phase; B

Pt₄^- + Carbon monoxide = (Pt₄^- • )

By formula: Pt₄^- + CO = (Pt₄^- • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	251. ± 38.	kJ/mol	N/A	Grushow and Ervin, 1997	gas phase; B

Pt₅^- + Carbon monoxide = (Pt₅^- • )

By formula: Pt₅^- + CO = (Pt₅^- • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	241. ± 38.	kJ/mol	N/A	Grushow and Ervin, 1997	gas phase; B

+ Carbon monoxide = ( • )

By formula: Ti⁺ + CO = (Ti⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	118. ± 5.9	kJ/mol	CIDT	Meyer and Armentrout, 1996	RCD

( • Carbon monoxide ) + = ( • 2)

By formula: (Ti⁺ • CO) + CO = (Ti⁺ • 2CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	113. ± 4.2	kJ/mol	CIDT	Meyer and Armentrout, 1996	RCD

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (Ti⁺ • 2CO) + CO = (Ti⁺ • 3CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	100. ± 4.2	kJ/mol	CIDT	Meyer and Armentrout, 1996	RCD

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (Ti⁺ • 3CO) + CO = (Ti⁺ • 4CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	87.0 ± 4.2	kJ/mol	CIDT	Meyer and Armentrout, 1996	RCD

( • 4 Carbon monoxide ) + = ( • 5)

By formula: (Ti⁺ • 4CO) + CO = (Ti⁺ • 5CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	69.9 ± 4.2	kJ/mol	CIDT	Meyer and Armentrout, 1996	RCD

( • 5 Carbon monoxide ) + = ( • 6)

By formula: (Ti⁺ • 5CO) + CO = (Ti⁺ • 6CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	74. ± 3.	kJ/mol	CIDT	Meyer and Armentrout, 1996	RCD

( • 6 Carbon monoxide ) + = ( • 7)

By formula: (Ti⁺ • 6CO) + CO = (Ti⁺ • 7CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	51.9 ± 7.1	kJ/mol	CIDT	Meyer and Armentrout, 1996	RCD

+ Carbon monoxide = ( • )

By formula: V⁺ + CO = (V⁺ • CO)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	120. ± 14.	kJ/mol	CID	Armentrout and Kickel, 1994	gas phase; Δ_rH(0 K0, guided ion beam CID; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
113. (+3.,-0.)		CID	Sievers and Armentrout, 1995	gas phase; guided ion beam CID; M

( • Carbon monoxide ) + = ( • 2)

By formula: (V⁺ • CO) + CO = (V⁺ • 2CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
91. (+3.,-0.)		CID	Sievers and Armentrout, 1995	gas phase; guided ion beam CID; M
106. (+7.9,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 2 Carbon monoxide ) + = ( • 3)

By formula: (V⁺ • 2CO) + CO = (V⁺ • 3CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
69. (+4.,-0.)		CID	Sievers and Armentrout, 1995	gas phase; guided ion beam CID; M
61. (+12.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 3 Carbon monoxide ) + = ( • 4)

By formula: (V⁺ • 3CO) + CO = (V⁺ • 4CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
85.8 (+9.6,-0.)		CID	Sievers and Armentrout, 1995	gas phase; guided ion beam CID; M
95. (+14.,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 4 Carbon monoxide ) + = ( • 5)

By formula: (V⁺ • 4CO) + CO = (V⁺ • 5CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
91. (+3.,-0.)		CID	Sievers and Armentrout, 1995	gas phase; guided ion beam CID; M
92.9 (+7.9,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 5 Carbon monoxide ) + = ( • 6)

By formula: (V⁺ • 5CO) + CO = (V⁺ • 6CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
99.6 (+6.7,-0.)		CID	Sievers and Armentrout, 1995	gas phase; guided ion beam CID; M
124. (+7.9,-0.)		CID	Armentrout and Kickel, 1994	gas phase; guided ion beam CID; M

( • 6 Carbon monoxide ) + = ( • 7)

By formula: (V⁺ • 6CO) + CO = (V⁺ • 7CO)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
50.2 (+8.8,-0.)		CID	Sievers and Armentrout, 1995	gas phase; guided ion beam CID; M

IR Spectrum

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, References, Notes

Data compiled by: Coblentz Society, Inc.

GAS (400 mmHg DILUTED TO A TOTAL PRESSURE OF 600 mmHg WITH N2); DOW KBr FOREPRISM; DIGITIZED BY NIST FROM HARD COPY (FROM TWO SEGMENTS); 4 cm^-1 resolution

Data compiled by: NIST Mass Spectrometry Data Center, William E. Wallace, director

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, Notes

Cox, Wagman, et al., 1984
Cox, J.D.; Wagman, D.D.; Medvedev, V.A., CODATA Key Values for Thermodynamics, Hemisphere Publishing Corp., New York, 1984, 1. [all data]

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Graham and Angelici, 1967
Graham, J.R.; Angelici, R.J., Inorg. Chem., 1967, 6, 2082. [all data]

Werner and Prinz, 1966
Werner, H.; Prinz, R., Chem. Ber., 1966, 99, 3582. [all data]

Poë, Sampson, et al., 1993
Poë, A.J.; Sampson, C.N.; Smith, R.T.; Zheng, Y., J. Am. Chem. Soc., 1993, 115, 3174. [all data]

Lewis, Golden, et al., 1984
Lewis, K.E.; Golden, D.M.; Smith, G.P., Organometallic bond dissociation energies: Laser pyrolysis of Fe(CO)₅, Cr(CO)₆, Mo(CO)₆, and W(CO)₆, J. Am. Chem. Soc., 1984, 106, 3905. [all data]

Smith and Laine, 1981
Smith, G.P.; Laine, R.M., Organometallic bond dissociation energies. Laser pyrolysis of Fe(CO)₅, J. Phys. Chem., 1981, 85, 1620. [all data]

Miller and Grant, 1985
Miller, M.E.; Grant, E.R., J. Am. Chem. Soc., 1985, 107, 3386. [all data]

Walsh, 1986
Walsh, R., NATO Advanced Workshop on the Design, Activation and Transformation of Organometallics into Common and Exotic Materials, Montpellier, France, 1986. [all data]

Ray, Brandow, et al., 1988
Ray, U.; Brandow, S.L.; Bandukwalla, G.; Venkataraman, B.K.; Zhang, Z.; Vernon, M., J. Chem. Phys., 1988, 89, 4092. [all data]

Sunderlin, Wang, et al., 1992
Sunderlin, L.S.; Wang, D.; Squires, R.R., Metal Carbonyl Bond Strengths in Fe(CO)n- and Ni(CO)n-, J. Am. Chem. Soc., 1992, 114, 8, 2788, https://doi.org/10.1021/ja00034a004 . [all data]

Engelking and Lineberger, 1979
Engelking, P.C.; Lineberger, W.C., Laser photoelectron spectrometry of the negative ions of iron and iron carbonyls. Electron affinity determination for the series Fe(CO)n,n=0,1,2,3,4, J. Am. Chem. Soc., 1979, 101, 5569. [all data]

Compton and Stockdale, 1976
Compton, R.N.; Stockdale, J.A.D., Formation of gas phase negative ions in Fe(CO)₅ and Ni(CO)₄, Int. J. Mass Spectrom. Ion Phys., 1976, 22, 47. [all data]

Ganske and Rosenfeld, 1990
Ganske, J.A.; Rosenfeld, R.N., J. Phys. Chem., 1990, 94, 4315. [all data]

Cetini and Gambino, 1963
Cetini, G.; Gambino, O., Atti Accad. Sci. Torino, Classe Sci. Fis. Mat. Nat., 1963, 97, 757. [all data]

Cetini and Gambino, 1963, 2
Cetini, G.; Gambino, O., Atti Accad. Sci. Torino, Classe Sci. Fis. Mat. Nat., 1963, 97, 1197. [all data]

Fletcher and Rosenfeld, 1988
Fletcher, R.T.; Rosenfeld, R.N., Recombination of Cr(CO)n with CO: Kinetics and Bond Dissociation Energies, J. Am. Chem. Soc., 1988, 110, 7, 2097, https://doi.org/10.1021/ja00215a014 . [all data]

Pajaro, Calderazzo, et al., 1960
Pajaro, G.; Calderazzo, F.; Ercoli, R., Gazz. Chim. Ital., 1960, 90, 1486. [all data]

Wovkulich and Atwood, 1980
Wovkulich, M.J.; Atwood, J.D., J. Organometal. Chem., 1980, 184, 77. [all data]

Dennenberg and Darensbourg, 1972
Dennenberg, R.J.; Darensbourg, D.J., Inorg. Chem., 1972, 11, 72. [all data]

Norwood, Guo, et al., 1988
Norwood, K.; Guo, J.H.; Luo, G.; Ng, C.Y., A Photoion - Photoelectron Coincidence Study of (CO)2, J. Chem. Phys., 1988, 88, 6, 4098, https://doi.org/10.1063/1.453814 . [all data]

Linn, Ono, et al., 1981
Linn, S.H.; Ono, Y.; Ng, C.Y., Molecular Beam Photoionization Study of CO, N2, and NO Dimers and Clusters, J. Chem. Phys., 1981, 74, 6, 3342, https://doi.org/10.1063/1.441486 . [all data]

Munson and Franlin, 1962
Munson, M.S.B. Field; Franlin, J.L., High-Pressure Mass Spectrometric Study of Reactions of Rare Gases with N2 and CO, J. Chem. Phys., 1962, 37, 8, 1790, https://doi.org/10.1063/1.1733370 . [all data]

Meot-Ner (Mautner) and Field, 1974
Meot-Ner (Mautner), M.; Field, F.H., Kinetics and Thermodynamics of the Association of CO+ with CO and of N2+ with N2 between 120 and 650 K, J. Chem. Phys., 1974, 61, 9, 3742, https://doi.org/10.1063/1.1682560 . [all data]

Chong and Franklin, 1971
Chong, S.L.; Franklin, J.L., High-Pressure Ion-Molecule Reactions in Carbon Monoxide and Carbon Monoxide - Methane Mixtures, J. Chem. Phys., 1971, 54, 4, 1487, https://doi.org/10.1063/1.1675043 . [all data]

Al-Takhin, Connor, et al., 1984
Al-Takhin, G.; Connor, J.A.; Pilcher, G.; Skinner, H.A., J. Organomet. Chem., 1984, 265, 263. [all data]

Adedeji, Brown, et al., 1975
Adedeji, F.A.; Brown, D.L.S.; Connor, J.A.; Leung, M.; Paz-Andrade, I.M.; Skinner, H.A., J. Organometal. Chem., 1975, 97, 221. [all data]

Hieber and Romberg, 1935
Hieber, W.; Romberg, E., Z. Anorg. Allg. Chem., 1935, 221, 321. [all data]

Rezukhina and Shvyrev, 1952
Rezukhina, T.N.; Shvyrev, V.V., Vestn. Moskov. Univ., 1952, 7, 41. [all data]

Daamen, Ernsting, et al., 1979
Daamen, H.; Ernsting, J.M.; Oskam, A., Thermochim. Acta, 1979, 33, 217. [all data]

Boxhoorn, Ernsting, et al., 1980
Boxhoorn, G.; Ernsting, J.M.; Stufkens, D.J.; Oskam, A., Thermochim. Acta, 1980, 42, 315. [all data]

Pilcher, Ware, et al., 1975
Pilcher, G.; Ware, M.J.; Pittam, D.A., J. Less-Common Met., 1975, 42, 223. [all data]

Barnes, Pilcher, et al., 1974
Barnes, D.S.; Pilcher, G.; Pittam, D.A.; Skinner, H.A.; Todd, D., J. Less-Common Met., 1974, 38, 53. [all data]

Pedley and Rylance, 1977
Pedley, J.B.; Rylance, J., Computer Analysed Thermochemical Data: Organic and Organometallic Compounds, University of Sussex, Brigton, 1977. [all data]

Tel'noi and Rabinovich, 1977
Tel'noi, V.I.; Rabinovich, I.B., Russ. Chem. Rev., 1977, 46, 689. [all data]

Koelliker and Bor, 1991
Koelliker, R.; Bor, G., J. Organometal. Chem., 1991, 417, 439. [all data]

Bor, 1986
Bor, G., Pure & Appl. Chem., 1986, 58, 543. [all data]

Ungváry and Markó, 1974
Ungváry, F.; Markó, L., J. Organometal. Chem., 1974, 71, 283. [all data]

Ungváry, 1972
Ungváry, F., J. Organometal. Chem., 1972, 36, 363. [all data]

Nakashima and Adamson, 1982
Nakashima, M.; Adamson, A.W., J. Phys. Chem., 1982, 86, 2905. [all data]

Jennings, Headley, et al., 1982
Jennings, K.R.; Headley, J.V.; Mason, R.S., The Temperature Dependence of Ion - Molecule Association Reactions, Int. J. Mass. Spectrom. Ion Phys, 1982, 45, 315. [all data]

Hiraoka, Saluja, et al., 1979
Hiraoka, K.; Saluja, P.P.S.; Kebarle, P., Stabilities of Complexes (N2)nH+, (CO)nH+ and (O2)nH+ for n = 1 to 7 Based on Gas Phase Ion Equilibrium Measurements, Can. J. Chem., 1979, 57, 16, 2159, https://doi.org/10.1139/v79-346 . [all data]

Rodgers and Armentrout, 2000
Rodgers, M.T.; Armentrout, P.B., Noncovalent Metal-Ligand Bond Energies as Studied by Threshold Collision-Induced Dissociation, Mass Spectrom. Rev., 2000, 19, 4, 215, https://doi.org/10.1002/1098-2787(200007)19:4<215::AID-MAS2>3.0.CO;2-X . [all data]

Carpenter, van Koppen, et al., 1995
Carpenter, C.J.; van Koppen, P.A.M.; Bowers, M.T., Details of Potential Energy Surfaces Involving C-C Bond Activation: Reactions of Fe+, Co+ and Ni+ with Acetone, J. Am. Chem. Soc., 1995, 117, 44, 10976, https://doi.org/10.1021/ja00149a021 . [all data]

Goebel, Haynes, et al., 1995
Goebel, S.; Haynes, C.L.; Khan, F.A.; Armentrout, P.B., Collision-Induced Dissociation Studies of Co(CO)x, x = 1-5: Sequential Bond Energies and the Heat of Formation of Co(CO)4, J. Am. Chem. Soc., 1995, 117, 26, 6994, https://doi.org/10.1021/ja00131a023 . [all data]

Armentrout and Kickel, 1994
Armentrout, P.B.; Kickel, B.L., Gas Phase Thermochemistry of Transition Metal Ligand Systems: Reassessment of Values and Periodic Trends, in Organometallic Ion Chemistry, B. S. Freiser, ed, 1994. [all data]

Johnson, Popov, et al., 1991
Johnson, F.P.A.; Popov, V.K.; George, M.W.; Bagratashvili, V.N.; Poliakoff, M.; Turner, J.J., Mendeleev Commun., 1991, 145.. [all data]

Morse, Parker, et al., 1989
Morse, J.M., Jr.; Parker, G.H.; Burkey, T.J., Organometallics, 1989, 8, 2471. [all data]

Venkataraman, Bandukwalla, et al., 1989
Venkataraman, B.K.; Bandukwalla, G.; Zhang, Z.; Vernon, M., J. Chem. Phys., 1989, 90, 5510. [all data]

Monteil, Raffin, et al., 1988
Monteil, Y.; Raffin, P.; Bouix, J., Thermochim. Acta, 1988, 125, 327. [all data]

Khan, Steele, et al., 1995
Khan, F.A.; Steele, D.L.; Armentrout, P.B., Ligand effects in organometallic thermochemistry: The sequential bond energies of Ni(CO)_x⁺ and Ni(N₂)_x⁺ (x = 1-4) and Ni(NO)_x⁺ (x = 1-3) [Data derived from reported bond energies taking value of 8.273±0.046 eV for IE[Ni(CO)₄]], J. Phys. Chem., 1995, 99, 7819. [all data]

Turner, Simpson, et al., 1983
Turner, J.J.; Simpson, M.B.; Poliakoff, M.; Maier II, W.B., J. Am. Chem. Soc., 1983, 105, 3898. [all data]

Nakajima, Taguwa, et al., 1994
Nakajima, A.; Taguwa, T.; Kaya, K., Photoelectron Spectroscopy of Iron Carbonyl Cluster Anions (Fen(CO)m(-), n=1-4), Chem. Phys. Lett., 1994, 221, 5-6, 436, https://doi.org/10.1016/0009-2614(94)00301-7 . [all data]

Hung and Grabowski, 1992
Hung, R.R.; Grabowski, J.J., Enthalpy measurements in organic solvents by photoacoustic calorimetry: a solution to the reaction volume problem, J. Am. Chem. Soc., 1992, 114, 351-353. [all data]

Herman and Goodman, 1989
Herman, M.S.; Goodman, J.L., Determination of the enthalpy and reaction volume changes of organic photoreactions using photoacoustic calorimetry, J. Am. Chem. Soc., 1989, 111, 1849-1854. [all data]

Grabowski, Simon, et al., 1984
Grabowski, J.J.; Simon, J.D.; Peters, K.S., Heat of formation of diphenylcyclopropenone by photoacoustic calorimetry, J. Am. Chem. Soc., 1984, 106, 4615-4616. [all data]

Hiraoka and Mori, 1989
Hiraoka, K.; Mori, T., Gas Phase Stabilities of the Cluster Ions H+(CO)2(CO)n, H+(N2)2(N2)n and H+(O2)2(O2)n with n = 1 - 14, Chem. Phys., 1989, 137, 1-3, 345, https://doi.org/10.1016/0301-0104(89)87119-8 . [all data]

McQuaid, Morris, et al., 1988
McQuaid, M.J.; Morris, K.; Gole, J.L., J. Am. Chem. Soc., 1988, 110, 5280. [all data]

Stevens, Feigerle, et al., 1982
Stevens, A.E.; Feigerle, C.S.; Lineberger, W.C., Laser Photoelectron Spectrometry of Ni(CO)_n^-, n=1-3, J. Am. Chem. Soc., 1982, 104, 19, 5026, https://doi.org/10.1021/ja00383a004 . [all data]

Nolan, López de la Vega, et al., 1986
Nolan, S.P.; López de la Vega, R.; Hoff, C.D., J. Am. Chem. Soc., 1986, 108, 7852. [all data]

Calderazzo, 1977
Calderazzo, F., Angew. Chem. Int. Ed. Engl., 1977, 16, 299. [all data]

Bronshstein, Gankin, et al., 1966
Bronshstein, Yu.E.; Gankin, V.Yu.; Krinkin, D.P.; Rudkovskii, D.M., Russ. J. Phys. Chem., 1966, 40, 802. [all data]

Cox and Pilcher, 1970
Cox, J.D.; Pilcher, G., Thermochemistry of Organic and Organometallic Compounds in Academic Press, New York, 1970. [all data]

Walter, Sievers, et al., 1998
Walter, D.; Sievers, M.R.; Armentrout, P.B., Alkali Ion Carbonyls: Sequential Bond Energies of Li+(CO)x (x=1-3), Na+(CO)x (x=1, 2), and K+(CO), Int. J. Mass Spectrom., 1998, 175, 1-2, 93, https://doi.org/10.1016/S0168-1176(98)00109-8 . [all data]

Castleman, Peterson, et al., 1983
Castleman, A.W.; Peterson, K.I.; Upschulte, B.L.; Schelling, F.J., Energetics and Structure of Na+ Cluster Ions, Int. J. Mass Spectrom. Ion Phys., 1983, 47, 203, https://doi.org/10.1016/0020-7381(83)87171-X . [all data]

Hiraoka and Mori, 1991
Hiraoka, K.; Mori, T., On the formation of the Isomeric Cluster Ions (CO)n+, J. Chem. Phys., 1991, 94, 4, 2697, https://doi.org/10.1063/1.459844 . [all data]

Moloy and Marks, 1984
Moloy, K.G.; Marks, T.J., J. Am. Chem. Soc., 1984, 106, 7051. [all data]

Barnes, Pilcher, et al., 1974, 2
Barnes, D.S.; Pilcher, G.; Pittam, D.A.; Skinner, H.A.; Todd, D.; Virmani, Y., J. Less-Common Met., 1974, 36, 177. [all data]

Connor, Skinner, et al., 1972
Connor, J.A.; Skinner, H.A.; Virmani, Y., Microcalorimetric studies. Thermal decomposition and iodination of metal carbonyls, J. Chem. Soc., Faraday Trans. 1, 1972, 68, 0, 1754, https://doi.org/10.1039/f19726801754 . [all data]

Wong and Brintzinger, 1975
Wong, K.L.T.; Brintzinger, H.H., J. Am. Chem. Soc., 1975, 97, 5143. [all data]

Al-Takhin, Connor, et al., 1984, 2
Al-Takhin, G.; Connor, J.A.; Skinner, H.A.; Zaharani-Moettar, M.T., J. Organomet. Chem., 1984, 260, 189. [all data]

Pittam, Pilcher, et al., 1975
Pittam, D.A.; Pilcher, G.; Barnes, D.S.; Skinner, H.A.; Todd, D., J. Less-Common Met., 1975, 42, 217. [all data]

Bor and Dietler, 1980
Bor, G.; Dietler, U.K., J. Organometal. Chem., 1980, 191, 295. [all data]

Hunter and Lias, 1998
Hunter, E.P.; Lias, S.G., Evaluated Gas Phase Basicities and Proton Affinities of Molecules: An Update, J. Phys. Chem. Ref. Data, 1998, 27, 3, 413-656, https://doi.org/10.1063/1.556018 . [all data]

Refaey and Franklin, 1976
Refaey, K.M.A.; Franklin, J.L., Endoergic ion-molecule-collision processes of negative ions. III. Collisions of I- on O₂, CO and CO₂, Int. J. Mass Spectrom. Ion Phys., 1976, 20, 19. [all data]

Erman, Karawajczyk, et al., 1993
Erman, P.; Karawajczyk, A.; Rachlew-Kallne, E.; Stromholm, C.; Larsson, J.; Persson, A.; Zerne, R., Direct determination of the ionization potential of CO by resonantly enhanced multiphoton ionization mass spectrometry, Chem. Phys. Lett., 1993, 215, 173. [all data]

Kimura, Katsumata, et al., 1981
Kimura, K.; Katsumata, S.; Achiba, Y.; Yamazaki, T.; Iwata, S., Ionization energies, Ab initio assignments, and valence electronic structure for 200 molecules in Handbook of HeI Photoelectron Spectra of Fundamental Organic Compounds, Japan Scientific Soc. Press, Tokyo, 1981. [all data]

Fock, Gurtler, et al., 1980
Fock, J.-H.; Gurtler, P.; Koch, E.E., Molecular Rydberg transitions in carbon monoxide: term value/ionization energy correlation of BF, CO and N₂., Chem. Phys., 1980, 47, 87. [all data]

Hille and Mark, 1978
Hille, E.; Mark, T.D., Cross section for single and double ionization of carbon monoxide by electron impact from threshold up to 180 eV, J. Chem. Phys., 1978, 69, 4600. [all data]

Rabalais, Debies, et al., 1974
Rabalais, J.W.; Debies, T.P.; Berkosky, J.L.; Huang, J.-T.J.; Ellison, F.O., Calculated photoionization cross sections relative experimental photoionization intensities for a selection of small molecules, J. Chem. Phys., 1974, 61, 516. [all data]

Natalis, 1973
Natalis, P., Contribution a la spectroscopie photoelectronique. Effets de l'autoionisation dans less spectres photoelectroniques de molecules diatomiques et triatomiques, Acad. R. Belg. Mem. Cl. Sci. Collect. 8, 1973, 41, 1. [all data]

Ogawa and Ogawa, 1972
Ogawa, M.; Ogawa, S., Absorption spectrum of CO in the Hopfield helium continuum region, 600-1020 A, J. Mol. Spectrosc., 1972, 41, 393. [all data]

Hotop and Niehaus, 1970
Hotop, H.; Niehaus, A., Reactions of excited atoms and molecules with atoms and molecules. V.Comparison of Penning electron and photoelectron spectra of H₂, N₂ and CO, Intern. J. Mass Spectrom. Ion Phys., 1970, 5, 415. [all data]

Collin and Natalis, 1969
Collin, J.E.; Natalis, P., Ionic states and photon impact-enhanced vibrational excitation in diatomic molecules by photoelectron spectroscopy. Photoelectron spectra of N₂, CO and O₂, Intern. J. Mass Spectrom. Ion Phys., 1969, 2, 231. [all data]

Turner and May, 1966
Turner, D.W.; May, D.P., Franck-Condon factors in ionization: experimental measurement using molecular photoelectron spectroscopy, J. Chem. Phys., 1966, 45, 471. [all data]

Krupenie, 1966
Krupenie, P.H., The band spectrum of carbon monoxide, Natl. Stand. Ref. Data Ser., Natl. Bur. Stand. NSRDS-NBS, 1966, 5. [all data]

Cook, Metzger, et al., 1965
Cook, G.R.; Metzger, P.H.; Ogawa, M., Photoionization and absorption coefficients of CO in the 600 to 1000 A region, Can. J. Phys., 1965, 43, 1706. [all data]

Potts and Williams, 1974
Potts, A.W.; Williams, T.A., The observation of "forbidden" transitions in He II photoelectron spectra, J. Electron Spectrosc. Relat. Phenom., 1974, 3, 3. [all data]

Katrib, Debies, et al., 1973
Katrib, A.; Debies, T.P.; Colton, R.J.; Lee, T.H.; Rabalais, J.W., The use of differential photoionization cross sections as a function of excitation energy in assigning photoelectron spectra, Chem. Phys. Lett., 1973, 22, 196. [all data]

Thomas, 1970
Thomas, T.D., X-ray photoelectron spectroscopy of carbon monoxide, J. Chem. Phys., 1970, 53, 1744. [all data]

Oertel, Schenk, et al., 1980
Oertel, H.; Schenk, H.; Baumgartel, H., Ion pair formation from photon irradiation of O₂, NO and CO in 17-30 eV, Chem. Phys., 1980, 46, 251. [all data]

Smyth, Schiavone, et al., 1974
Smyth, K.C.; Schiavone, J.A.; Freund, R.S., Dissociative excitation of CO by electron impact: Translational spectroscopy of long-lived high-Rydberg fragment atoms, J. Chem. Phys., 1974, 60, 1358. [all data]

Locht and Momigny, 1971
Locht, R.; Momigny, J., Mass spectrometric study of ion-pair processes in diatomic molecules: H₂, CO, NO and O₂, Int. J. Mass Spectrom. Ion Phys., 1971, 7, 121. [all data]

Hierl and Franklin, 1967
Hierl, P.M.; Franklin, J.L., Appearance potentials and kinetic energies of ions from N₂, CO, and NO, J. Chem. Phys., 1967, 47, 3154. [all data]

Fineman and Petrocelli, 1961
Fineman, M.A.; Petrocelli, A.W., Molecular studies with a Lozier electron impact apparatus, Planetary Space Sci., 1961, 3, 187. [all data]

Weissler, Samson, et al., 1959
Weissler, G.L.; Samson, J.A.R.; Ogawa, M.; Cook, G.R., Photoionization analysis by mass spectroscopy, J. Opt. Soc. Am., 1959, 49, 338. [all data]

Meyer, Chen, et al., 1995
Meyer, F.; Chen, Y.M.; Armentrout, P.B., Sequential Bond Energies of Cu(CO)x+ and Ag(CO)x+ (x = 1-4), J. Am. Chem. Soc., 1995, 117, 14, 4071, https://doi.org/10.1021/ja00119a023 . [all data]

Norwood, Guo, et al., 1989
Norwood, K.; Guo, J.H.; Luo, G.; Ng, C.Y., A Study of Intramolecular Charge Transfer in Mixed Ar/Co Dimer and Trimer Ions Using the Photoion - Photoelectron Coincidence Method, Chem. Phys., 1989, 129, 1, 109, https://doi.org/10.1016/0301-0104(89)80023-0 . [all data]

Hiraoka, Nasu, et al., 1996
Hiraoka, K.; Nasu, M.; Fujimaki, S.; Ignacio, E.W.; Yamabe, S., Gas-Phase Stability and Structure of the Cluster Ions CF3+(CO)n, CF3+(N2)n, CF3+((CF4)n, and CF4H+(CF4)n, J. Phys. Chem., 1996, 100, 13, 5245, https://doi.org/10.1021/jp9530010 . [all data]

Villalta and Leopold, 1993
Villalta, P.W.; Leopold, D.G., A Study of FeCO- and the 3-Sigma(-) and 5-Sigma(-) States of FeCO by Negative Ion Photoelectron Spectroscopy, J. Chem. Phys., 1993, 98, 10, 7730, https://doi.org/10.1063/1.464580 . [all data]

Murray, Miller, et al., 1986
Murray, K.K.; Miller, T.M.; Leopold, D.G.; Lineberger, W.C., Laser photoelectron spectroscopy of the Formylf anion, J. Chem. Phys., 1986, 84, 2520. [all data]

Grushow and Ervin, 1997
Grushow, A.; Ervin, K.M., Ligand and Metal Binding Energies in Platinum Carbonyl Cluster Anions: Collision Induced Dissociation of PtM- and Ptm(CO)n-, J. Chem. Phys., 1997, 106, 23, 9580, https://doi.org/10.1063/1.474116 . [all data]

Shi, Spasov, et al., 2001
Shi, Y.; Spasov, V.A.; Ervin, K.M., Photodesorption of carbonyl from Pt-3(CO)(n)(-) (n=1-6), Int. J. Mass Spectrom., 2001, 204, 1-3, 197-208, https://doi.org/10.1016/S1387-3806(00)00364-X . [all data]

Sunderlin, Wang, et al., 1993
Sunderlin, L.S.; Wang, D.N.; Squires, R.R., Bond Strengths in 1st-Row-Metal Carbonyl Anions, J. Am. Chem. Soc., 1993, 115, 25, 12060, https://doi.org/10.1021/ja00078a051 . [all data]

Sunderlin and Squires, 1999
Sunderlin, L.S.; Squires, R.R., Bond strengths in cyclopentadienyl metal carbonyl anions, Int. J. Mass Spectrom., 1999, 183, 149-161, https://doi.org/10.1016/S1387-3806(98)14230-6 . [all data]

Khan, Clemmer, et al., 1993
Khan, F.A.; Clemmer, D.E.; Schultz, R.H.; Armentrout, P.B., Sequential Bond Energies of Cr(CO)x+, x=1-6, J. Phys. Chem., 1993, 97, 30, 7978, https://doi.org/10.1021/j100132a029 . [all data]

Tecklenberg, Bricker, et al., 1988
Tecklenberg, R.E.; Bricker, D.L.; Russel, D.H., Laser - Ion Beam Photodissociation Studies of Ionic Cluster Fragments of Iron Carbonyls: Fe(x)(CO)y+ (x = 1 - 3; y = 0 - 6), Organometallics, 1988, 7, 12, 2506, https://doi.org/10.1021/om00102a013 . [all data]

Praxmarer, Jordan, et al., 1993
Praxmarer, C. Hansel; Jordan, A.; Kraus, H.; Lindinger, W., Reactions of Kr2+ with Various Neutrals, Int.J. Mass Spectrom. Ion. Proc., 1993, 129, 121, https://doi.org/10.1016/0168-1176(93)87036-R . [all data]

Wadt, 1978
Wadt, W.R., The Electronic States of Ar2+, Kr2+, Xe2+. I. Potential Curves with and without Spin-Orbit Coupling, J. Chem. Phys., 1978, 68, 2, 402, https://doi.org/10.1063/1.435773 . [all data]

Radzig and Smirnov, 1985
Radzig, R.; Smirnov, B.M., Reference Data on Atoms in Molecules and Ions, Springer, Berlin, 1985. [all data]

Andersen, Muntean, et al., 2000
Andersen, A.; Muntean, F.; Walter, D.; Rue, C.; Armentrout, P.B., Collision-Induced Dissociation and Theoretical Studies of Mg+ Complexes with CO, CO2, NH3, CH4, CH3OH, and C6H6, J. Phys. Chem. A, 2000, 104, 4, 692, https://doi.org/10.1021/jp993031t . [all data]

Dearden, Hayashibara, et al., 1989
Dearden, D.V.; Hayashibara, K.; Beauchamp, J.L.; Kirschner, N.J.; Van Koppen, P.A.M.; Bowers, M.T., Fundamental Studies of the Energetics and Dynamics of Ligand Dissociation and Exchange Processes at Transition - Metal Centers in the Gas Phase: Mn(COx)+, x = 1 - 6, J. Am. Chem. Soc., 1989, 111, 7, 2401, https://doi.org/10.1021/ja00189a005 . [all data]

Adams and Bohme, 1970
Adams, N.G.; Bohme, D., Flowing Afterglow Studies of Formation and Reactions of Cluster Ions of O₂⁺, O₂^-, and O^-, J. Chem. Phys., 1970, 52, 6, 3133, https://doi.org/10.1063/1.1673449 . [all data]

Zhang and Armentrout, 2001
Zhang, X.-G.; Armentrout, P.B., Sequential Bond Energies of Pt(CO)x, (x=1-4) Determined by Collision-Induced Dissociation, Organometallics, 2001, 20, 20, 4266, https://doi.org/10.1021/om010390d . [all data]

Meyer and Armentrout, 1996
Meyer, F.; Armentrout, P.B., Sequential Bond Energies of Ti(CO)x+, x=1-7, Molec. Phys., 1996, 88, 187. [all data]

Sievers and Armentrout, 1995
Sievers, M.R.; Armentrout, P.B., Collision-Induced Dissociation Studies of V(CO)x+, x = 1-7: Sequential Bond Energies and the Heat of Formation of V(CO)6, J. Phys. Chem., 1995, 99, 20, 8135, https://doi.org/10.1021/j100020a041 . [all data]

Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, Ion clustering data, IR Spectrum, References

Symbols used in this document:

AE	Appearance energy
EA	Electron affinity
IE (evaluated)	Recommended ionization energy
S°_{gas,1 bar}	Entropy of gas at standard conditions (1 bar)
T	Temperature
Δ_fH_{(+) ion,0K}	Enthalpy of formation of positive ion at 0K
Δ_fH°_gas	Enthalpy of formation of gas at standard conditions
Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions
Δ_rS°	Entropy of reaction at standard conditions

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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