Carbon monoxide

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Gas phase thermochemistry data

Go To: Top, Reaction thermochemistry data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Quantity Value Units Method Reference Comment
ΔfH°gas-26.417 ± 0.041kcal/molReviewCox, Wagman, et al., 1984CODATA Review value
ΔfH°gas-26.417kcal/molReviewChase, 1998Data last reviewed in September, 1965
Quantity Value Units Method Reference Comment
S°gas,1 bar47.2419 ± 0.001cal/mol*KReviewCox, Wagman, et al., 1984CODATA Review value
S°gas,1 bar47.242cal/mol*KReviewChase, 1998Data last reviewed in September, 1965

Gas Phase Heat Capacity (Shomate Equation)

Cp° = 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
    Cp = heat capacity (cal/mol*K)
    H° = standard enthalpy (kcal/mol)
    S° = standard entropy (cal/mol*K)
    t = temperature (K) / 1000.

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Temperature (K) 298. to 1300.1300. to 6000.
A 6.1108018.401219
B 1.4570110.310730
C 0.969086-0.049216
D -0.6384560.003239
E 0.031315-0.784603
F -28.20480-30.55390
G 54.3419055.38050
H -26.41661-26.41661
ReferenceChase, 1998Chase, 1998
Comment Data last reviewed in September, 1965 Data last reviewed in September, 1965

Reaction thermochemistry data

Go To: Top, Gas phase thermochemistry data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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

Manganese, tricarbonyl(η5-2,4-cyclopentadien-1-yl)- (solution) + Heptane (solution) = C14H21MnO2 (solution) + Carbon monoxide (solution)

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

Quantity Value Units Method Reference Comment
ΔrH°47. ± 2.kcal/molAVGN/AAverage of 18 values; Individual data points

Chromium hexacarbonyl (solution) + Heptane (solution) = C12H16CrO5 (solution) + Carbon monoxide (solution)

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

Quantity Value Units Method Reference Comment
ΔrH°27.1 ± 0.8kcal/molAVGN/AAverage of 13 values; Individual data points

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

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

Quantity Value Units Method Reference Comment
ΔrH°40.20 ± 0.60kcal/molKinSGraham and Angelici, 1967solvent: 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
ΔrH°38.10kcal/molKinSWerner and Prinz, 1966solvent: 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

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

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

Quantity Value Units Method Reference Comment
ΔrH°31.7 ± 1.4kcal/molKinSGraham and Angelici, 1967solvent: 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
ΔrH°30.21kcal/molKinSWerner and Prinz, 1966solvent: 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

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

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

Quantity Value Units Method Reference Comment
ΔrH°39.9 ± 1.6kcal/molKinSGraham and Angelici, 1967solvent: 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
ΔrH°39.01kcal/molKinSWerner and Prinz, 1966solvent: 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) = Hydrogen (g) + Osmium, dodecacarbonyltri-, triangulo (solution)

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

Quantity Value Units Method Reference Comment
ΔrH°-9.0 ± 2.3kcal/molES/KSPoë, Sampson, et al., 1993solvent: Decalin; Calculated from equilibrium and kinetic data Poë, Sampson, et al., 1993.; MS
ΔrH°-18.5 ± 2.3kcal/molN/APoë, Sampson, et al., 1993solvent: 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

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

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

Quantity Value Units Method Reference Comment
ΔrH°41.5 ± 3.0kcal/molLPHPLewis, Golden, et al., 1984Please also see Smith and Laine, 1981. Temperature range: 670-780 K. The reaction enthalpy at 298 K relies on an activation energy of 40.01 kcal/mol and assumes a negligible activation barrier for product recombination. The enthalpy of formation relies on -173.0 ± 1.6 kcal/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: 1.7 kcal/mol Miller and Grant, 1985 and 3.99 kcal/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
ΔrH°55. ± 11.kcal/molN/AEngelking and Lineberger, 1979Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

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

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

Quantity Value Units Method Reference Comment
ΔrH°34.9 ± 5.0kcal/molKinGGanske and Rosenfeld, 1990MS
ΔrH°40.5 ± 3.0kcal/molLPHPLewis, Golden, et al., 1984The reaction enthalpy at 298 K relies on an activation energy of 39.01 kcal/mol and assumes a negligible activation barrier for product recombination. The enthalpy of formation relies on -218.8 ± 0.50 kcal/mol for the enthalpy of formation of Mo(CO)6(g); MS
ΔrH°30.21kcal/molKinGCetini and Gambino, 1963Please 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

Tungsten hexacarbonyl (g) = C5O5W (g) + Carbon monoxide (g)

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

Quantity Value Units Method Reference Comment
ΔrH°46.0 ± 3.0kcal/molLPHPLewis, Golden, et al., 1984The reaction enthalpy at 298 K relies on an activation energy of 44.50 kcal/mol and assumes a negligible activation barrier for product recombination. The enthalpy of formation relies on -211.3 ± 0.65 kcal/mol for the enthalpy of formation of W(CO)6(g); MS
ΔrH°39.79kcal/molKinGCetini and Gambino, 1963, 2Please 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

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

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

Quantity Value Units Method Reference Comment
ΔrH°37.0 ± 5.0kcal/molKinGFletcher and Rosenfeld, 1988MS
ΔrH°36.8 ± 3.0kcal/molLPHPLewis, Golden, et al., 1984Temperature range: 740-820 K. The reaction enthalpy at 298 K relies on an activation energy of 35.30 kcal/mol and assumes a negligible activation barrier for product recombination.; MS
ΔrH°38.70kcal/molKinGPajaro, Calderazzo, et al., 1960Please 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) = Chromium hexacarbonyl (solution) + 1,3-Diazine (solution)

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

Quantity Value Units Method Reference Comment
ΔrH°-14.8kcal/molKinSWovkulich and Atwood, 1980solvent: Hexane; The data rely on the enthalpy and entropy of activation for the forward reaction, 25.4 ± 1.1 kcal/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, 40.20 ± 0.60 kcal/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+ • Carbon monoxide)

By formula: CO+ + CO = (CO+ • CO)

Quantity Value Units Method Reference Comment
ΔrH°16.kcal/molPIPECONorwood, Guo, et al., 1988gas phase; CO+ in state B, ΔrH>; M
ΔrH°22.4kcal/molPILinn, Ono, et al., 1981gas phase; M
ΔrH°28. ± 7.kcal/molEIMunson and Franlin, 1962gas phase; from IP'switching reaction and heats of formation; M
ΔrH°25.4kcal/molPHPMSMeot-Ner (Mautner) and Field, 1974gas phase; ΔrH>, DG>; M
Quantity Value Units Method Reference Comment
ΔrS°20.cal/mol*KPHPMSMeot-Ner (Mautner) and Field, 1974gas phase; ΔrH>, DG>; M

Free energy of reaction

ΔrG° (kcal/mol) T (K) Method Reference Comment
4.9340.HPMSChong and Franklin, 1971gas phase; equilibrium uncertain; M
11.5695.PHPMSMeot-Ner (Mautner) and Field, 1974gas phase; ΔrH>, DG>; M

Tungsten hexacarbonyl (cr) = 6Carbon monoxide (g) + tungsten (cr)

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

Quantity Value Units Method Reference Comment
ΔrH°71.4 ± 1.1kcal/molTD-HFC, HAL-HFCAl-Takhin, Connor, et al., 1984The reaction enthalpy corresponds to the TD experiments and leads to -229.9 ± 1.1 kcal/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: 17.5 ± 0.2 kcal/mol Adedeji, Brown, et al., 1975, 17.7 ± 1.0 kcal/mol Hieber and Romberg, 1935, 16.7 ± 1.0 kcal/mol Rezukhina and Shvyrev, 1952, and 18.9 ± 0.26 kcal/mol Daamen, Ernsting, et al., 1979 Boxhoorn, Ernsting, et al., 1980. See also Pilcher, Ware, et al., 1975; MS
ΔrH°70.77 ± 0.43kcal/molTD-HZCBarnes, Pilcher, et al., 1974Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977.; MS

Tri-ruthenium dodecacarbonyl (solution) + 3Carbon monoxide (solution) = 3C5O5Ru (solution)

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

Quantity Value Units Method Reference Comment
ΔrH°-3.11 ± 0.26kcal/molEqSKoelliker and Bor, 1991solvent: Isooctane; Temperature range: 373-448 K; MS
ΔrH°-6.48 ± 0.45kcal/molEqSBor, 1986solvent: n-Hexane; Temperature range: ca. 348-448 K; MS

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

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

Quantity Value Units Method Reference Comment
ΔrH°22.2kcal/molKinSUngváry and Markó, 1974solvent: Heptane; Temperature range: 298-328 K; MS
ΔrH°21.0kcal/molKinSUngváry, 1972solvent: Heptane; Temperature range: 307-337 K; MS

Tungsten hexacarbonyl (cr) + 1,3-Diazine (l) = C10H5NO5W (cr) + Carbon monoxide (g)

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

Quantity Value Units Method Reference Comment
ΔrH°8.27kcal/molN/ANakashima and Adamson, 1982The 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, 6.55 ± 0.69 kcal/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 1.9 kcal/mol, respectively Nakashima and Adamson, 1982.; MS

Formyl cation + Carbon monoxide = (Formyl cation • Carbon monoxide)

By formula: CHO+ + CO = (CHO+ • CO)

Quantity Value Units Method Reference Comment
ΔrH°10.8kcal/molPHPMSJennings, Headley, et al., 1982gas phase; M
ΔrH°12.8kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; M
ΔrH°11.7kcal/molPHPMSMeot-Ner (Mautner) and Field, 1974gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°22.5cal/mol*KPHPMSJennings, Headley, et al., 1982gas phase; M
ΔrS°24.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; M
ΔrS°20.9cal/mol*KPHPMSMeot-Ner (Mautner) and Field, 1974gas phase; M

Cobalt ion (1+) + Carbon monoxide = (Cobalt ion (1+) • Carbon monoxide)

By formula: Co+ + CO = (Co+ • CO)

Quantity Value Units Method Reference Comment
ΔrH°41.6 ± 1.7kcal/molCIDTRodgers and Armentrout, 2000RCD
ΔrH°39. ± 3.kcal/molMKERCarpenter, van Koppen, et al., 1995gas phase; M

Enthalpy of reaction

ΔrH° (kcal/mol) T (K) Method Reference Comment
41.5 (+1.6,-0.) CIDGoebel, Haynes, et al., 1995gas phase; guided ion beam CID; M
39.0 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

Molybdenum hexacarbonyl (solution) + Heptane (solution) = C12H16MoO5 (solution) + Carbon monoxide (solution)

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

Quantity Value Units Method Reference Comment
ΔrH°32.3 ± 2.9kcal/molPACJohnson, Popov, et al., 1991solvent: Heptane; The reaction enthalpy relies on 0.67 for the quantum yield of CO dissociation.; MS
ΔrH°31.8 ± 1.3kcal/molPACMorse, Parker, et al., 1989solvent: 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
ΔrH°36.7 ± 3.5kcal/molFA-SIFTSunderlin, Wang, et al., 1992MS
ΔrH°>27.0kcal/molN/AVenkataraman, Bandukwalla, et al., 1989Method: Velocity distributions of photofragments from Fe(CO)5.; MS
ΔrH°23.9 ± 6.9kcal/molN/AEngelking and Lineberger, 1979Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

Nickel tetracarbonyl (g) = 4Carbon monoxide (g) + nickel (cr)

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

Quantity Value Units Method Reference Comment
ΔrH°38.34 ± 0.60kcal/molEqGMonteil, Raffin, et al., 1988The reaction enthalpy is the average of several 2nd and 3rd law results Monteil, Raffin, et al., 1988; MS

Nickel ion (1+) + Carbon monoxide = (Nickel ion (1+) • Carbon monoxide)

By formula: Ni+ + CO = (Ni+ • CO)

Quantity Value Units Method Reference Comment
ΔrH°39. ± 3.kcal/molMKERCarpenter, van Koppen, et al., 1995gas phase; determined from MKER and theory; M

Enthalpy of reaction

ΔrH° (kcal/mol) T (K) Method Reference Comment
41.7 (+2.5,-0.) CIDKhan, Steele, et al., 1995gas phase; guided ion beam CID; M
42.5 (+2.2,-0.) CIDArmentrout and Kickel, 1994gas 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
ΔrH°29.0 ± 5.8kcal/molFA-SIFTSunderlin, Wang, et al., 1992MS
ΔrH°25.1kcal/molN/AVenkataraman, Bandukwalla, et al., 1989Method: Velocity distributions of photofragments from Fe(CO)5.; MS
ΔrH°32.7 ± 6.9kcal/molN/AEngelking and Lineberger, 1979Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

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

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

Quantity Value Units Method Reference Comment
ΔrH°8.4 ± 3.5kcal/molFA-SIFTSunderlin, Wang, et al., 1992MS
ΔrH°<39.0kcal/molN/AVenkataraman, Bandukwalla, et al., 1989Method: Velocity distributions of photofragments from Fe(CO)5.; MS
ΔrH°21. ± 6.9kcal/molN/AEngelking and Lineberger, 1979Please 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
ΔrH°28.0 ± 8.6kcal/molFA-SIFTSunderlin, Wang, et al., 1992MS
ΔrH°10.kcal/molN/AVenkataraman, Bandukwalla, et al., 1989Method: Velocity distributions of photofragments from Fe(CO)5.; MS
ΔrH°4.5 ± 9.3kcal/molN/AEngelking and Lineberger, 1979Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

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

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

Quantity Value Units Method Reference Comment
ΔrH°22.6kcal/molKinSTurner, Simpson, et al., 1983solvent: Liquid krypton; The reaction enthalpy relies on the experimental value for the activation enthalpy, 22.6 kcal/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 • 4294967295Carbon monoxide) + 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
ΔrH°34.7 ± 9.6kcal/molN/ANakajima, Taguwa, et al., 1994gas phase; Vertical Detachment Energy: 3.02±0.13 eV; B
ΔrH°36. ± 12.kcal/molN/AEngelking and Lineberger, 1979gas phase; B
ΔrH°41.7 ± 2.5kcal/molCIDTSunderlin, Wang, et al., 1992gas phase; Affinity: CO..Fe(CO)3-; B

2-Cyclopropen-1-one, 2,3-diphenyl- = Diphenylacetylene + Carbon monoxide

By formula: C15H10O = C14H10 + CO

Quantity Value Units Method Reference Comment
ΔrH°-6.7 ± 1.2kcal/molCphaHung and Grabowski, 1992liquid phase; solvent: Alkane; ALS
ΔrH°4.2 ± 2.5kcal/molCphaHerman and Goodman, 1989solid phase; solvent: Acetonitrile/water; ALS
ΔrH°-9.9 ± 2.9kcal/molCphaGrabowski, Simon, et al., 1984liquid phase; solvent: Benzene; ALS

(Formyl cation • 2Carbon monoxide) + Carbon monoxide = (Formyl cation • 3Carbon monoxide)

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

Quantity Value Units Method Reference Comment
ΔrH°4.7 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
ΔrH°6.3kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°15.8cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M
ΔrS°26.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; M

(Formyl cation • 3Carbon monoxide) + Carbon monoxide = (Formyl cation • 4Carbon monoxide)

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

Quantity Value Units Method Reference Comment
ΔrH°4.5 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
ΔrH°6.2kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°18.2cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M
ΔrS°29.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; M

(Formyl cation • 4Carbon monoxide) + Carbon monoxide = (Formyl cation • 5Carbon monoxide)

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

Quantity Value Units Method Reference Comment
ΔrH°4.2 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
ΔrH°5.8kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°22.9cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M
ΔrS°32.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; M

(Formyl cation • Carbon monoxide) + Carbon monoxide = (Formyl cation • 2Carbon monoxide)

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

Quantity Value Units Method Reference Comment
ΔrH°4.9 ± 0.3kcal/molPHPMSHiraoka and Mori, 1989gas phase; M
ΔrH°6.6kcal/molPHPMSHiraoka, Saluja, et al., 1979gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°15.0cal/mol*KPHPMSHiraoka and Mori, 1989gas phase; M
ΔrS°24.cal/mol*KPHPMSHiraoka, Saluja, et al., 1979gas phase; M

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

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

Quantity Value Units Method Reference Comment
ΔrH°40.6 ± 5.8kcal/molFA-SIFTSunderlin, Wang, et al., 1992MS
ΔrH°25.8kcal/molN/AMcQuaid, Morris, et al., 1988Method: Chemiluminescence spectroscopy.; MS
ΔrH°29. ± 15.kcal/molN/AStevens, Feigerle, et al., 1982Please also see Compton and Stockdale, 1976. Method: LPS and collision with low energy electrons.; MS

(Cobalt ion (1+) • Carbon monoxide) + Carbon monoxide = (Cobalt ion (1+) • 2Carbon monoxide)

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

Quantity Value Units Method Reference Comment
ΔrH°36.6 ± 2.2kcal/molCIDTRodgers and Armentrout, 2000RCD

Enthalpy of reaction

ΔrH° (kcal/mol) T (K) Method Reference Comment
36.4 (+2.1,-0.) CIDGoebel, Haynes, et al., 1995gas phase; guided ion beam CID; M
32.9 (+4.8,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

Iron ion (1+) + Carbon monoxide = (Iron ion (1+) • Carbon monoxide)

By formula: Fe+ + CO = (Fe+ • CO)

Quantity Value Units Method Reference Comment
ΔrH°30.8 ± 1.0kcal/molCIDTRodgers and Armentrout, 2000RCD
ΔrH°32. ± 3.kcal/molMKERCarpenter, van Koppen, et al., 1995gas phase; determined from MKER and theory; M

Enthalpy of reaction

ΔrH° (kcal/mol) T (K) Method Reference Comment
31.3 (+1.9,-0.) CIDArmentrout and Kickel, 1994gas phase; guided ion beam CID; M

Manganese, pentacarbonylmethyl- (solution) + Carbon monoxide (solution) = Manganese, acetylpentacarbonyl-, (OC-6-21)- (solution)

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

Quantity Value Units Method Reference Comment
ΔrH°-13.4 ± 1.0kcal/molRSCNolan, López de la Vega, et al., 1986solvent: Tetrahydrofuran; MS
ΔrH°-12.6kcal/molEqSCalderazzo, 1977solvent: 2,2'-diethoxydiethyl ether; MS

Cobalt, tetracarbonylhydro- (g) = 0.5Hydrogen (g) + 4Carbon monoxide (g) + cobalt (cr)

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

Quantity Value Units Method Reference Comment
ΔrH°30.38 ± 0.50kcal/molEqGBronshstein, Gankin, et al., 1966Please also see Pedley and Rylance, 1977 and Cox and Pilcher, 1970. Temperature range: ca. 423-533 K; MS

(Sodium ion (1+) • Carbon monoxide) + Carbon monoxide = (Sodium ion (1+) • 2Carbon monoxide)

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

Quantity Value Units Method Reference Comment
ΔrH°5.7 ± 0.7kcal/molCIDTRodgers and Armentrout, 2000RCD
ΔrH°5.7 ± 0.7kcal/molCIDTWalter, Sievers, et al., 1998RCD
ΔrH°7.5kcal/molHPMSCastleman, Peterson, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°15.1cal/mol*KHPMSCastleman, Peterson, et al., 1983gas phase; M

Tungsten hexacarbonyl (solution) + 1,3-Diazine (solution) = C10H5NO5W (solution) + Carbon monoxide (solution)

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

Quantity Value Units Method Reference Comment
ΔrH°6.55 ± 0.69kcal/molPCNakashima and Adamson, 1982solvent: Cyclohexane; MS
ΔrH°5.95 ± 0.69kcal/molPCNakashima and Adamson, 1982solvent: Benzene; MS
ΔrH°4.40 ± 0.1kcal/molPCNakashima and Adamson, 1982solvent: Tetrahydrofuran; MS

Sodium ion (1+) + Carbon monoxide = (Sodium ion (1+) • Carbon monoxide)

By formula: Na+ + CO = (Na+ • CO)

Quantity Value Units Method Reference Comment
ΔrH°7.6 ± 1.9kcal/molCIDTRodgers and Armentrout, 2000RCD
ΔrH°7.6 ± 1.9kcal/molCIDTWalter, Sievers, et al., 1998RCD
ΔrH°12.6kcal/molHPMSCastleman, Peterson, et al., 1983gas phase; M
Quantity Value Units Method Reference Comment
ΔrS°20.4cal/mol*KHPMSCastleman, Peterson, et al., 1983gas phase; M

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

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

Quantity Value Units Method Reference Comment
ΔrH°25. ± 2.kcal/molN/AStevens, Feigerle, et al., 1982Please also see Compton and Stockdale, 1976. The enthalpy of formation relies on -144.0 ± 0.62 kcal/mol for the enthalpy of formation of Ni(CO)4(g) Method: LPS and collision with low energy electrons.; MS

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

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

Quantity Value Units Method Reference Comment
ΔrH°7.21kcal/molPHPMSHiraoka and Mori, 1991gas phase; two isomers, at low and high temperatures; M
Quantity Value Units Method Reference Comment
ΔrS°24.5cal/mol*KPHPMSHiraoka and Mori, 1991gas phase; two isomers, at low and high temperatures; M

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

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

Quantity Value Units Method Reference Comment
ΔrH°2.70kcal/molPHPMSHiraoka and Mori, 1991gas phase; two isomers, at low and high temperatures; M
Quantity Value Units Method Reference Comment
ΔrS°19.1cal/mol*KPHPMSHiraoka and Mori, 1991gas 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
ΔrH°-5.9 ± 1.5kcal/molEqSMoloy and Marks, 1984solvent: 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
ΔrH°-4.49 ± 0.91kcal/molEqSMoloy and Marks, 1984solvent: Toluene; Temperature range: ca. 180-220 K; MS

Molybdenum hexacarbonyl (cr) = 6Carbon monoxide (g) + molybdenum (cr)

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

Quantity Value Units Method Reference Comment
ΔrH°77.89 ± 0.36kcal/molTD-HZCBarnes, Pilcher, et al., 1974, 2Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977.; MS
ΔrH°71.0 ± 1.0kcal/molTD-HFCConnor, Skinner, et al., 1972Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977.; MS

(Formyl cation • 14Carbon monoxide) + Carbon monoxide = (Formyl cation • 15Carbon monoxide)

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

Quantity Value Units Method Reference Comment
ΔrH°1.76kcal/molPHPMSHiraoka and Mori, 1989gas phase; Entropy change calculated or estimated; M
Quantity Value Units Method Reference Comment
ΔrS°23.cal/mol*KN/AHiraoka and Mori, 1989gas phase; Entropy change calculated or estimated; M

bis(η(5)-Cyclopentadienyl) chromium (solution) + Carbon monoxide (solution) = C11H10CrO (solution)

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

Quantity Value Units Method Reference Comment
ΔrH°-18.8 ± 0.50kcal/molEqSWong and Brintzinger, 1975solvent: Toluene; Temperature range: 280-308 K; MS

Chromium hexacarbonyl (cr) = 6Carbon monoxide (g) + chromium (cr)

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

Quantity Value Units Method Reference Comment
ΔrH°63.6 ± 1.kcal/molTD-HFCAl-Takhin, Connor, et al., 1984, 2MS
ΔrH°75.3 ± 0.2kcal/molTD-HZCPittam, Pilcher, et al., 1975Please also see Pedley and Rylance, 1977 and Tel'noi and Rabinovich, 1977.; MS
ΔrH°64.4 ± 1.1kcal/molTD-HFCConnor, Skinner, et al., 1972MS

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

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

Quantity Value Units Method Reference Comment
ΔrH°29.49 ± 0.50kcal/molEqSBor and Dietler, 1980solvent: Hexane; Temperature range: 378-418 K; MS

References

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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]

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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
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Walsh, 1986
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Ray, Brandow, et al., 1988
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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]

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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]

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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]

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Boxhoorn, Ernsting, et al., 1980
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Pilcher, Ware, et al., 1975
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Barnes, Pilcher, et al., 1974
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Al-Takhin, Connor, et al., 1984, 2
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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]

Notes

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, References