Nitrogen

Formula: N₂
Molecular weight: 28.0134
IUPAC Standard InChI: InChI=1S/N2/c1-2
IUPAC Standard InChIKey: IJGRMHOSHXDMSA-UHFFFAOYSA-N
CAS Registry Number: 7727-37-9
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: Nitrogen gas; N2; UN 1066; UN 1977; Dinitrogen; Molecular nitrogen; Diatomic nitrogen; Nitrogen-14
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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 156
- Henry's Law data
- Mass spectrum (electron ionization)
- Constants of diatomic molecules
- Fluid Properties
Data at other public NIST sites:
- Electron-Impact Ionization Cross Sections (on physics web site)
- Gas Phase Kinetics Database
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Gas phase thermochemistry data

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

Quantity	Value	Units	Method	Reference	Comment
S°_{gas,1 bar}	191.609 ± 0.004	J/mol*K	Review	Cox, Wagman, et al., 1984	CODATA Review value
S°_{gas,1 bar}	191.61	J/mol*K	Review	Chase, 1998	Data last reviewed in March, 1977

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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View table.

Temperature (K)	100. to 500.	500. to 2000.	2000. to 6000.
A	28.98641	19.50583	35.51872
B	1.853978	19.88705	1.128728
C	-9.647459	-8.598535	-0.196103
D	16.63537	1.369784	0.014662
E	0.000117	0.527601	-4.553760
F	-8.671914	-4.935202	-18.97091
G	226.4168	212.3900	224.9810
H	0.0	0.0	0.0
Reference	Chase, 1998	Chase, 1998	Chase, 1998
Comment	Data last reviewed in March, 1977; New parameter fit January 2009	Data last reviewed in March, 1977; New parameter fit January 2009	Data last reviewed in March, 1977; New parameter fit January 2009

Reaction thermochemistry data

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

Data compiled as indicated in comments:
M - Michael M. Meot-Ner (Mautner) and Sharon G. Lias
MS - José A. Martinho Simões
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

+ Nitrogen = ( • )

By formula: NO^- + N₂ = (NO^- • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Δ_rH°	20.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; Δ_rS+-12. J/mol*K; M
Δ_rH°	18.	kJ/mol	HPMS	Speller, Fitaire, et al., 1983	gas phase; Entropy change is questionable; M
Δ_rH°	22.	kJ/mol	HPMS	Turner and Conway, 1976	gas phase; M
Δ_rH°	19.	kJ/mol	DT	Johnsen, Huang, et al., 1975	gas phase; corrected for ln T by Keesee and Castleman, 1986; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	71.1	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Δ_rS°	57.7	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; Δ_rS+-12. J/mol*K; M
Δ_rS°	55.6	J/mol*K	HPMS	Speller, Fitaire, et al., 1983	gas phase; Entropy change is questionable; M
Δ_rS°	79.1	J/mol*K	HPMS	Turner and Conway, 1976	gas phase; M
Δ_rS°	65.7	J/mol*K	DT	Johnsen, Huang, et al., 1975	gas phase; corrected for ln T by Keesee and Castleman, 1986; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
2.	200.	FA	Dunkin, Fehsenfeld, et al., 1971	gas phase; M

+ Nitrogen = ( • )

By formula: N₂⁺ + N₂ = (N₂⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	102. to 102.	kJ/mol	RNG	N/A	Range of 6 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	87.9	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rS°	67.8	J/mol*K	PHPMS	Teng and Conway, 1973	gas phase; M
Δ_rS°	81.6	J/mol*K	PHPMS	Payzant and Kebarle, 1970	gas phase; M
Δ_rS°	46.	J/mol*K	DT	Varney, 1968	gas phase; Entropy change is questionable; M
Δ_rS°	-4.	J/mol*K	DT	Varney, 1959	gas phase; Entropy change is questionable; M

+ Nitrogen = ( • )

By formula: O₂⁺ + N₂ = (O₂⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	21. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rH°	22.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; M
Δ_rH°	24.	kJ/mol	PHPMS	Janik and Conway, 1967	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	72.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rS°	66.1	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; M
Δ_rS°	79.1	J/mol*K	PHPMS	Janik and Conway, 1967	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
0.0	296.	FA	Howard, Bierbaum, et al., 1972	gas phase; M

(HN₂⁺ • 4 Nitrogen ) + = (HN₂⁺ • 5)

By formula: (HN₂⁺ • 4N₂) + N₂ = (HN₂⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	13.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	95.8	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	84.	J/mol*K	N/A	Hiraoka, Saluja, et al., 1979	gas phase; Entropy change calculated or estimated; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
5.9	92.	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; Entropy change calculated or estimated; M

( • 7 Nitrogen • ) + = ( • 8 • )

By formula: (O₂^- • 7N₂ • O₂) + N₂ = (O₂^- • 8N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7. ± 1.	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Δ_rH°	6.40	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	74.9	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M
Δ_rS°	75.3	J/mol*K	N/A	Hiraoka, 1988	gas phase; Entropy change calculated or estimated; M

( • 2 Nitrogen ) + = ( • 3)

By formula: (O₂⁺ • 2N₂) + N₂ = (O₂⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rH°	15.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	82.0	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rS°	50.6	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M

( • Nitrogen ) + = ( • 2)

By formula: (O₂⁺ • N₂) + N₂ = (O₂⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rH°	18.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.9	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rS°	57.7	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M

( • Nitrogen ) + = ( • 2)

By formula: (NO^- • N₂) + N₂ = (NO^- • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Δ_rH°	16.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	72.8	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Δ_rS°	52.7	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M

C₃N₂NiO₃ (solution) = C₃NiO₃ (solution) + Nitrogen (solution)

By formula: C₃N₂NiO₃ (solution) = C₃NiO₃ (solution) + N₂ (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	42. ± 4.	kJ/mol	KinS	Turner, Simpson, et al., 1983	solvent: Liquid krypton; The reaction enthalpy relies on the experimental value for the activation enthalpy, 42. ± 4. kJ/mol, and on the assumption that the activation enthalpy for product recombination is negligible Turner, Simpson, et al., 1983.; MS

N⁺ + Nitrogen = (N⁺ • )

By formula: N⁺ + N₂ = (N⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	249.	kJ/mol	N/A	National Bureau of Standards, 1968	gas phase; from Δ_rH(f); M
Δ_rH°	250.	kJ/mol	EI	Saporoschenko, 1965	gas phase; M
Δ_rH°	250.	kJ/mol	EI	Franklin, Dibeler, et al., 1958	gas phase; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
361. (+7.5,-0.)		CID	Haynes, Freysinger, et al., 1995	gas phase; guided ion beam CID; M

+ Nitrogen = ( • )

By formula: Cu⁺ + N₂ = (Cu⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	26.	kJ/mol	HPMS	El-Shall, Schriver, et al., 1989	gas phase; Cu+ from laser desrption; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	67.	J/mol*K	HPMS	El-Shall, Schriver, et al., 1989	gas phase; Cu+ from laser desrption; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	5.9	kJ/mol	HPMS	El-Shall, Schriver, et al., 1989	gas phase; Cu+ from laser desrption; M

(HN₂⁺ • 2 Nitrogen ) + = (HN₂⁺ • 3)

By formula: (HN₂⁺ • 2N₂) + N₂ = (HN₂⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	16.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.1	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	84.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

(HN₂⁺ • 3 Nitrogen ) + = (HN₂⁺ • 4)

By formula: (HN₂⁺ • 3N₂) + N₂ = (HN₂⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	15.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	88.7	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	84.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

(HN₂⁺ • Nitrogen ) + = (HN₂⁺ • 2)

By formula: (HN₂⁺ • N₂) + N₂ = (HN₂⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	15. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	17.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	80.3	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	75.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

+ Nitrogen = ( • )

By formula: Na⁺ + N₂ = (Na⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	33.	kJ/mol	FA	Perry, Rowe, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	77.8	J/mol*K	FA	Perry, Rowe, et al., 1980	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
9.2	310.	FA	Perry, Rowe, et al., 1980	gas phase; M
8.4	310.	DT	Beyer and Keller, 1971	gas phase; low E/N; M

HN₂⁺ + Nitrogen = (HN₂⁺ • )

By formula: HN₂⁺ + N₂ = (HN₂⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.9	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Δ_rH°	60.7	kJ/mol	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	100.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Δ_rS°	85.4	J/mol*K	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; M

C₃₉H₆₆N₂O₃P₂W (solution) + (g) = C₃₉H₆₈O₃P₂W (solution) + Nitrogen (g)

By formula: C₃₉H₆₆N₂O₃P₂W (solution) + H₂ (g) = C₃₉H₆₈O₃P₂W (solution) + N₂ (g)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18.4 ± 1.7	kJ/mol	EqS	Gonzalez and Hoff, 1989	solvent: Tetrahydrofuran; Temperature range: 288-308 K; MS

C₃₉H₆₆MoO₃P₃ (solution) + Nitrogen (g) = C₃₉H₆₆MoN₂O₃P₂ (solution)

By formula: C₃₉H₆₆MoO₃P₃ (solution) + N₂ (g) = C₃₉H₆₆MoN₂O₃P₂ (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-37.7 ± 2.5	kJ/mol	EqS	Gonzalez and Hoff, 1989	solvent: Tetrahydrofuran; Temperature range: 294-308 K; MS

( • 2 Nitrogen • 3) + = ( • 3 • 3)

By formula: (H₃O⁺ • 2N₂ • 3H₂O) + N₂ = (H₃O⁺ • 3N₂ • 3H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	5.0	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; Δ_rH, Δ_rS approximate; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	27.	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; Δ_rH, Δ_rS approximate; M

( • 4 Nitrogen ) + = ( • 5)

By formula: (O₂⁺ • 4N₂) + N₂ = (O₂⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.3 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	67.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
3.	184.	HPMS	Speller and Fitaire, 1983	gas phase; M

( • 2 Nitrogen ) + = ( • 3)

By formula: (NO^- • 2N₂) + N₂ = (NO^- • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	70.3	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
4.	204.	HPMS	Speller, Fitaire, et al., 1983	gas phase; M

( • 3 Nitrogen ) + = ( • 4)

By formula: (NO^- • 3N₂) + N₂ = (NO^- • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	74.9	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
2.	204.	HPMS	Speller, Fitaire, et al., 1983	gas phase; M

( • 3 Nitrogen ) + = ( • 4)

By formula: (O₂⁺ • 3N₂) + N₂ = (O₂⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	94.1	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
3.	204.	HPMS	Speller and Fitaire, 1983	gas phase; M

( • 3 Nitrogen • 2) + = ( • 4 • 2)

By formula: (H₃O⁺ • 3N₂ • 2H₂O) + N₂ = (H₃O⁺ • 4N₂ • 2H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; Δ_rH, Δ_rS approximate; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	50.	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; Δ_rH, Δ_rS approximate; M

( • 9 Nitrogen ) + = ( • 10)

By formula: (NO^- • 9N₂) + N₂ = (NO^- • 10N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.03	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.	J/mol*K	N/A	Hiraoka and Yamabe, 1989	gas phase; Entropy change calculated or estimated; M

(HN₂⁺ • 10 Nitrogen ) + = (HN₂⁺ • 11)

By formula: (HN₂⁺ • 10N₂) + N₂ = (HN₂⁺ • 11N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.20	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	92.	J/mol*K	N/A	Hiraoka and Mori, 1989	gas phase; Entropy change calculated or estimated; M

O₃^- + Nitrogen = (O₃^- • )

By formula: O₃^- + N₂ = (O₃^- • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.3 ± 0.84	kJ/mol	TDAs	Hiraoka, 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	77.0	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-11.7 ± 2.1	kJ/mol	TDAs	Hiraoka, 1988	gas phase; B

(C₂H₅⁺ • Nitrogen ) + = (C₂H₅⁺ • 2)

By formula: (C₂H₅⁺ • N₂) + N₂ = (C₂H₅⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.	kJ/mol	HPMS	Speller, 1983	gas phase; deuterated, Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	45.6	J/mol*K	HPMS	Speller, 1983	gas phase; deuterated, Entropy change is questionable; M

( • Nitrogen ) + = ( • 2)

By formula: (N₂⁺ • N₂) + N₂ = (N₂⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.5 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rH°	5.9	kJ/mol	PI	Linn, Ono, et al., 1981	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	62.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • ) + Nitrogen = ( • • )

By formula: (O₂⁺ • O₂) + N₂ = (O₂⁺ • N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	42.3	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M

( • Nitrogen ) + = ( • 2)

By formula: (Na⁺ • N₂) + N₂ = (Na⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	22.	kJ/mol	FA	Perry, Rowe, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	70.3	J/mol*K	FA	Perry, Rowe, et al., 1980	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
-1.	310.	FA	Perry, Rowe, et al., 1980	gas phase; M

(CH₂N⁺ • 2 Nitrogen ) + = (CH₂N⁺ • 3)

By formula: (CH₂N⁺ • 2N₂) + N₂ = (CH₂N⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.	kJ/mol	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	54.8	J/mol*K	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M

(CH₂N⁺ • 3 Nitrogen ) + = (CH₂N⁺ • 4)

By formula: (CH₂N⁺ • 3N₂) + N₂ = (CH₂N⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.	kJ/mol	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	57.7	J/mol*K	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M

(CH₂N⁺ • 4 Nitrogen ) + = (CH₂N⁺ • 5)

By formula: (CH₂N⁺ • 4N₂) + N₂ = (CH₂N⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.	kJ/mol	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	63.6	J/mol*K	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M

+ 0.5 = + + 0.5 Nitrogen

By formula: C₄H₄BrNO₂ + 0.5H₄N₂ = HBr + C₄H₅NO₂ + 0.5N₂

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	-260.3 ± 0.46	kJ/mol	Cm	Howard and Skinner, 1966	solid phase; solvent: Aqueous solution; Reanalyzed by Pedley, Naylor, et al., 1986, Original value = -261.7 ± 0.46 kJ/mol; ALS

+ Nitrogen = ( • )

By formula: O₂^- + N₂ = (O₂^- • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	25. ± 4.2	kJ/mol	N/A	Posey and Johnson, 1988	gas phase; B
Δ_rH°	<56.90	kJ/mol	IMRB	Adams and Bohme, 1970	gas phase; N₂..O₂^- + O₂ -> O₄^-; B

C₁₂H₃₄P₄Ru (solution) + Nitrogen (solution) = C₁₂H₃₂N₂P₄Ru (solution) + (solution)

By formula: C₁₂H₃₄P₄Ru (solution) + N₂ (solution) = C₁₂H₃₂N₂P₄Ru (solution) + H₂ (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.3	kJ/mol	PAC	Belt, Scaiano, et al., 1993	solvent: Cyclohexane; The reaction enthalpy relies on 0.85 for the quantum yield of H2 dissociation.; MS

( • 2 Nitrogen • 2) + = ( • 3 • 2)

By formula: (H₃O⁺ • 2N₂ • 2H₂O) + N₂ = (H₃O⁺ • 3N₂ • 2H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	38. ± 11.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	119.	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

(solution) + Nitrogen (solution) = C₈H₅N₂O₃V (solution) + (solution)

By formula: C₉H₅O₄V (solution) + N₂ (solution) = C₈H₅N₂O₃V (solution) + CO (solution)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	27. ± 4.	kJ/mol	PAC	Johnson, Popov, et al., 1991	solvent: Heptane; The reaction enthalpy relies on 0.80 for the quantum yield of CO dissociation.; MS

( • 2 Nitrogen • ) + = ( • 3 • )

By formula: (O₂^- • 2N₂ • O₂) + N₂ = (O₂^- • 3N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.3 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	76.6	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 3 Nitrogen • ) + = ( • 4 • )

By formula: (O₂^- • 3N₂ • O₂) + N₂ = (O₂^- • 4N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.0 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	78.2	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 4 Nitrogen • ) + = ( • 5 • )

By formula: (O₂^- • 4N₂ • O₂) + N₂ = (O₂^- • 5N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.1 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	81.6	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 5 Nitrogen • ) + = ( • 6 • )

By formula: (O₂^- • 5N₂ • O₂) + N₂ = (O₂^- • 6N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.6 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	81.6	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 6 Nitrogen • ) + = ( • 7 • )

By formula: (O₂^- • 6N₂ • O₂) + N₂ = (O₂^- • 7N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.1 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	78.7	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • Nitrogen • ) + = ( • 2 • )

By formula: (O₂^- • N₂ • O₂) + N₂ = (O₂^- • 2N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.7 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	74.9	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 2 Nitrogen • ) + = ( • 3 • )

By formula: (H₃O⁺ • 2N₂ • H₂O) + N₂ = (H₃O⁺ • 3N₂ • H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	33. ± 8.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	92.	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • Nitrogen • 2) + = ( • 2 • 2)

By formula: (H₃O⁺ • N₂ • 2H₂O) + N₂ = (H₃O⁺ • 2N₂ • 2H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	22.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	69.5	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • Nitrogen • 3) + = ( • 2 • 3)

By formula: (H₃O⁺ • N₂ • 3H₂O) + N₂ = (H₃O⁺ • 2N₂ • 3H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	65.7	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • 10 Nitrogen ) + = ( • 11)

By formula: (O₂⁺ • 10N₂) + N₂ = (O₂⁺ • 11N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.5	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 10 Nitrogen ) + = ( • 11)

By formula: (N₂⁺ • 10N₂) + N₂ = (N₂⁺ • 11N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.9 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.5	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Reaction thermochemistry data, Ion clustering data, 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
LBLHLM - Sharon G. Lias, John E. Bartmess, Joel F. Liebman, John L. Holmes, Rhoda D. Levin, and W. Gary Mallard
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

View reactions leading to N₂⁺ (ion structure unspecified)

Quantity	Value	Units	Method	Reference	Comment
IE (evaluated)	15.581 ± 0.008	eV	N/A	N/A	L
Quantity	Value	Units	Method	Reference	Comment
Proton affinity (review)	493.8	kJ/mol	N/A	Hunter and Lias, 1998	HL
Quantity	Value	Units	Method	Reference	Comment
Gas basicity	464.5	kJ/mol	N/A	Hunter and Lias, 1998	HL

Ionization energy determinations

IE (eV)	Method	Reference	Comment
15.581 ± 0.008	S	Trickl, Cromwell, et al., 1989	LL
15.7 ± 0.1	EI	Stephen, Mark, et al., 1984	LBLHLM
15.6 ± 0.1	EI	Grade, Wienecke, et al., 1983	LBLHLM
15.60	PE	Kimura, Katsumata, et al., 1981	LLK
10.1 ± 0.6	EI	Armentrout, Tarr, et al., 1981	LLK
15.58	EI	Armentrout, Tarr, et al., 1981	LLK
15.5808	EVAL	Huber and Herzberg, 1979	LLK
15.58 ± 0.02	EI	Sahini, Constantin, et al., 1978	LLK
15.5	PI	Rabalais, Debies, et al., 1974	LLK
15.58	PE	Lee and Rabalais, 1974	LLK
15.61	PE	Natalis, 1973	LLK
15.58 ± 0.01	PE	Hotop and Niehaus, 1970	RDSH
15.56	CI	Cermak, 1968	RDSH
15.58	PI	Cook and Metzger, 1964	RDSH
15.5803	S	Ogawa and Tanaka, 1962	RDSH
15.5802	S	Worley, 1943	RDSH
15.5812 ± 0.0002	S	Worley and Jenkins, 1938	RDSH
15.58	PE	Potts and Williams, 1974	Vertical value; LLK
15.60	PE	Katrib, Debies, et al., 1973	Vertical value; LLK

Appearance energy determinations

Ion	AE (eV)	Other Products	Method	Reference	Comment
N⁺	24.34	N(4So)	EI	Locht, Schopman, et al., 1975	LLK
N⁺	24.3	N	EI	Smyth, Schiavone, et al., 1973	LLK
N⁺	24.4 ± 0.25	N	EI	Crowe and McConkey, 1973	LLK
N⁺	24.32 ± 0.03	N	EI	Hierl and Franklin, 1967	RDSH
N⁺	48. ± 2.	N⁺	EI	Hierl and Franklin, 1967	RDSH
N⁺	24.32 ± 0.02	N	EI	Frost and McDowell, 1956	RDSH

Ion clustering data

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

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

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

Ar⁺ + Nitrogen = (Ar⁺ • )

By formula: Ar⁺ + N₂ = (Ar⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	164.	kJ/mol	FA	Shul, Passarella, et al., 1987	gas phase; switching reaction(Ar+)Ar, Δ_rH>; Dehmer and Pratt, 1982; M

+ Nitrogen = ( • )

By formula: CF₃⁺ + N₂ = (CF₃⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	29.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	100.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • Nitrogen ) + = ( • 2)

By formula: (CF₃⁺ • N₂) + N₂ = (CF₃⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	21.	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	92.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • 2 Nitrogen ) + = ( • 3)

By formula: (CF₃⁺ • 2N₂) + N₂ = (CF₃⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.4	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	54.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • 3 Nitrogen ) + = ( • 4)

By formula: (CF₃⁺ • 3N₂) + N₂ = (CF₃⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.5	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	59.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

( • 4 Nitrogen ) + = ( • 5)

By formula: (CF₃⁺ • 4N₂) + N₂ = (CF₃⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.3	kJ/mol	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	50.	J/mol*K	PHPMS	Hiraoka, Nasu, et al., 1996	gas phase; M

CH₂N⁺ + Nitrogen = (CH₂N⁺ • )

By formula: CH₂N⁺ + N₂ = (CH₂N⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	32.	kJ/mol	HPMS	Speller, Fitaire, et al., 1982	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	92.9	J/mol*K	HPMS	Speller, Fitaire, et al., 1982	gas phase; M

(CH₂N⁺ • Nitrogen ) + = (CH₂N⁺ • 2)

By formula: (CH₂N⁺ • N₂) + N₂ = (CH₂N⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	21.	kJ/mol	HPMS	Speller, Fitaire, et al., 1982	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	83.3	J/mol*K	HPMS	Speller, Fitaire, et al., 1982	gas phase; M

(CH₂N⁺ • 2 Nitrogen ) + = (CH₂N⁺ • 3)

By formula: (CH₂N⁺ • 2N₂) + N₂ = (CH₂N⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.	kJ/mol	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	54.8	J/mol*K	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M

(CH₂N⁺ • 3 Nitrogen ) + = (CH₂N⁺ • 4)

By formula: (CH₂N⁺ • 3N₂) + N₂ = (CH₂N⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.	kJ/mol	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	57.7	J/mol*K	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M

(CH₂N⁺ • 4 Nitrogen ) + = (CH₂N⁺ • 5)

By formula: (CH₂N⁺ • 4N₂) + N₂ = (CH₂N⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13.	kJ/mol	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	63.6	J/mol*K	HPMS	Speller, Fitaire, et al., 1982	gas phase; Entropy change is questionable; M

+ Nitrogen = ( • )

By formula: CH₃⁺ + N₂ = (CH₃⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	203.	kJ/mol	PDiss	Foster, Williamson, et al., 1974	gas phase; M

CH₅⁺ + Nitrogen = (CH₅⁺ • )

By formula: CH₅⁺ + N₂ = (CH₅⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	28.	kJ/mol	HPMS	Speller, 1983	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	82.4	J/mol*K	HPMS	Speller, 1983	gas phase; M

C₂H₅⁺ + Nitrogen = (C₂H₅⁺ • )

By formula: C₂H₅⁺ + N₂ = (C₂H₅⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	29.	kJ/mol	HPMS	Speller, 1983	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	76.1	J/mol*K	HPMS	Speller, 1983	gas phase; M

(C₂H₅⁺ • Nitrogen ) + = (C₂H₅⁺ • 2)

By formula: (C₂H₅⁺ • N₂) + N₂ = (C₂H₅⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19.	kJ/mol	HPMS	Speller, 1983	gas phase; deuterated, Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	45.6	J/mol*K	HPMS	Speller, 1983	gas phase; deuterated, Entropy change is questionable; M

+ Nitrogen = ( • )

By formula: Ca⁺ + N₂ = (Ca⁺ • N₂)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
25.	296.	FA	Spears and Fehsenfeld, 1972	gas phase; M

+ Nitrogen = ( • )

By formula: Cu⁺ + N₂ = (Cu⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	26.	kJ/mol	HPMS	El-Shall, Schriver, et al., 1989	gas phase; Cu+ from laser desrption; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	67.	J/mol*K	HPMS	El-Shall, Schriver, et al., 1989	gas phase; Cu+ from laser desrption; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	5.9	kJ/mol	HPMS	El-Shall, Schriver, et al., 1989	gas phase; Cu+ from laser desrption; M

( • Nitrogen ) + = ( • 2)

By formula: (Cu⁺ • N₂) + N₂ = (Cu⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	12.	kJ/mol	HPMS	El-Shall, Schriver, et al., 1989	gas phase; Cu+ from laser desorption, equilibrium?; M

( • 2 Nitrogen ) + = ( • 3)

By formula: (Cu⁺ • 2N₂) + N₂ = (Cu⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	10.	kJ/mol	HPMS	El-Shall, Schriver, et al., 1989	gas phase; Cu+ from laser desorption; M

+ Nitrogen = ( • )

By formula: Fe⁺ + N₂ = (Fe⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	54.0 ± 5.9	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

( • Nitrogen ) + = ( • 2)

By formula: (Fe⁺ • N₂) + N₂ = (Fe⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	82.8 ± 9.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

( • 2 Nitrogen ) + = ( • 3)

By formula: (Fe⁺ • 2N₂) + N₂ = (Fe⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	45. ± 3.	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

( • 3 Nitrogen ) + = ( • 4)

By formula: (Fe⁺ • 3N₂) + N₂ = (Fe⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	54.0 ± 4.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

( • 4 Nitrogen ) + = ( • 5)

By formula: (Fe⁺ • 4N₂) + N₂ = (Fe⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	61.9 ± 4.2	kJ/mol	CIDT	Rodgers and Armentrout, 2000	RCD

HN₂⁺ + Nitrogen = (HN₂⁺ • )

By formula: HN₂⁺ + N₂ = (HN₂⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	66.9	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Δ_rH°	60.7	kJ/mol	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	100.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Δ_rS°	85.4	J/mol*K	PHPMS	Meot-Ner (Mautner) and Field, 1974	gas phase; M

(HN₂⁺ • Nitrogen ) + = (HN₂⁺ • 2)

By formula: (HN₂⁺ • N₂) + N₂ = (HN₂⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	15. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	17.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	80.3	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	75.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

(HN₂⁺ • 2 Nitrogen ) + = (HN₂⁺ • 3)

By formula: (HN₂⁺ • 2N₂) + N₂ = (HN₂⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	16.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.1	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	84.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

(HN₂⁺ • 3 Nitrogen ) + = (HN₂⁺ • 4)

By formula: (HN₂⁺ • 3N₂) + N₂ = (HN₂⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	15.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	88.7	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	84.	J/mol*K	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; M

(HN₂⁺ • 4 Nitrogen ) + = (HN₂⁺ • 5)

By formula: (HN₂⁺ • 4N₂) + N₂ = (HN₂⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12. ± 1.	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rH°	13.	kJ/mol	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	95.8	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M
Δ_rS°	84.	J/mol*K	N/A	Hiraoka, Saluja, et al., 1979	gas phase; Entropy change calculated or estimated; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
5.9	92.	PHPMS	Hiraoka, Saluja, et al., 1979	gas phase; Entropy change calculated or estimated; M

(HN₂⁺ • 5 Nitrogen ) + = (HN₂⁺ • 6)

By formula: (HN₂⁺ • 5N₂) + N₂ = (HN₂⁺ • 6N₂)

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°	87.4	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

(HN₂⁺ • 6 Nitrogen ) + = (HN₂⁺ • 7)

By formula: (HN₂⁺ • 6N₂) + N₂ = (HN₂⁺ • 7N₂)

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°	89.5	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

(HN₂⁺ • 7 Nitrogen ) + = (HN₂⁺ • 8)

By formula: (HN₂⁺ • 7N₂) + N₂ = (HN₂⁺ • 8N₂)

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°	90.0	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

(HN₂⁺ • 8 Nitrogen ) + = (HN₂⁺ • 9)

By formula: (HN₂⁺ • 8N₂) + N₂ = (HN₂⁺ • 9N₂)

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°	91.2	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

(HN₂⁺ • 9 Nitrogen ) + = (HN₂⁺ • 10)

By formula: (HN₂⁺ • 9N₂) + N₂ = (HN₂⁺ • 10N₂)

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°	91.2	J/mol*K	PHPMS	Hiraoka and Mori, 1989	gas phase; M

(HN₂⁺ • 10 Nitrogen ) + = (HN₂⁺ • 11)

By formula: (HN₂⁺ • 10N₂) + N₂ = (HN₂⁺ • 11N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.20	kJ/mol	PHPMS	Hiraoka and Mori, 1989	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	92.	J/mol*K	N/A	Hiraoka and Mori, 1989	gas phase; Entropy change calculated or estimated; M

( • ) + Nitrogen = ( • • )

By formula: (H₃O⁺ • H₂O) + N₂ = (H₃O⁺ • N₂ • H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	22.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	58.2	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • 2) + Nitrogen = ( • • 2)

By formula: (H₃O⁺ • 2H₂O) + N₂ = (H₃O⁺ • N₂ • 2H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	21.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	59.8	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • Nitrogen • ) + = ( • 2 • )

By formula: (H₃O⁺ • N₂ • H₂O) + N₂ = (H₃O⁺ • 2N₂ • H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	21.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	54.8	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • Nitrogen • 2) + = ( • 2 • 2)

By formula: (H₃O⁺ • N₂ • 2H₂O) + N₂ = (H₃O⁺ • 2N₂ • 2H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	22.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	69.5	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • Nitrogen • 3) + = ( • 2 • 3)

By formula: (H₃O⁺ • N₂ • 3H₂O) + N₂ = (H₃O⁺ • 2N₂ • 3H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	65.7	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • 2 Nitrogen • ) + = ( • 3 • )

By formula: (H₃O⁺ • 2N₂ • H₂O) + N₂ = (H₃O⁺ • 3N₂ • H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	33. ± 8.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	92.	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • 2 Nitrogen • 2) + = ( • 3 • 2)

By formula: (H₃O⁺ • 2N₂ • 2H₂O) + N₂ = (H₃O⁺ • 3N₂ • 2H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	38. ± 11.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	119.	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

( • 2 Nitrogen • 3) + = ( • 3 • 3)

By formula: (H₃O⁺ • 2N₂ • 3H₂O) + N₂ = (H₃O⁺ • 3N₂ • 3H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	5.0	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; Δ_rH, Δ_rS approximate; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	27.	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; Δ_rH, Δ_rS approximate; M

( • 3 Nitrogen • 2) + = ( • 4 • 2)

By formula: (H₃O⁺ • 3N₂ • 2H₂O) + N₂ = (H₃O⁺ • 4N₂ • 2H₂O)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; Δ_rH, Δ_rS approximate; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	50.	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; Δ_rH, Δ_rS approximate; M

+ Nitrogen = ( • )

By formula: H₄N⁺ + N₂ = (H₄N⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	50. ± 20.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	130.	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; M

+ Nitrogen = ( • )

By formula: K⁺ + N₂ = (K⁺ • N₂)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
4.2	310.	DT	Beyer and Keller, 1971	gas phase; low E/N; M

+ Nitrogen = ( • )

By formula: Li⁺ + N₂ = (Li⁺ • N₂)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
23.	318.	DT	Gatland, Colonna-Romano, et al., 1975	gas phase; low E/N; M

( • Nitrogen ) + = ( • 2)

By formula: (Li⁺ • N₂) + N₂ = (Li⁺ • 2N₂)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
18.	318.	DT	Gatland, Colonna-Romano, et al., 1975	gas phase; low E/N; M

N⁺ + Nitrogen = (N⁺ • )

By formula: N⁺ + N₂ = (N⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	249.	kJ/mol	N/A	National Bureau of Standards, 1968	gas phase; from Δ_rH(f); M
Δ_rH°	250.	kJ/mol	EI	Saporoschenko, 1965	gas phase; M
Δ_rH°	250.	kJ/mol	EI	Franklin, Dibeler, et al., 1958	gas phase; M

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
361. (+7.5,-0.)		CID	Haynes, Freysinger, et al., 1995	gas phase; guided ion beam CID; M

+ Nitrogen = ( • )

By formula: NO^- + N₂ = (NO^- • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Δ_rH°	20.	kJ/mol	DT	Gheno and Fitaire, 1987	gas phase; Δ_rS+-12. J/mol*K; M
Δ_rH°	18.	kJ/mol	HPMS	Speller, Fitaire, et al., 1983	gas phase; Entropy change is questionable; M
Δ_rH°	22.	kJ/mol	HPMS	Turner and Conway, 1976	gas phase; M
Δ_rH°	19.	kJ/mol	DT	Johnsen, Huang, et al., 1975	gas phase; corrected for ln T by Keesee and Castleman, 1986; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	71.1	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Δ_rS°	57.7	J/mol*K	DT	Gheno and Fitaire, 1987	gas phase; Δ_rS+-12. J/mol*K; M
Δ_rS°	55.6	J/mol*K	HPMS	Speller, Fitaire, et al., 1983	gas phase; Entropy change is questionable; M
Δ_rS°	79.1	J/mol*K	HPMS	Turner and Conway, 1976	gas phase; M
Δ_rS°	65.7	J/mol*K	DT	Johnsen, Huang, et al., 1975	gas phase; corrected for ln T by Keesee and Castleman, 1986; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
2.	200.	FA	Dunkin, Fehsenfeld, et al., 1971	gas phase; M

( • Nitrogen ) + = ( • 2)

By formula: (NO^- • N₂) + N₂ = (NO^- • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Δ_rH°	16.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	72.8	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Δ_rS°	52.7	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M

( • 2 Nitrogen ) + = ( • 3)

By formula: (NO^- • 2N₂) + N₂ = (NO^- • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	70.3	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
4.	204.	HPMS	Speller, Fitaire, et al., 1983	gas phase; M

( • 3 Nitrogen ) + = ( • 4)

By formula: (NO^- • 3N₂) + N₂ = (NO^- • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	74.9	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
2.	204.	HPMS	Speller, Fitaire, et al., 1983	gas phase; M

( • 4 Nitrogen ) + = ( • 5)

By formula: (NO^- • 4N₂) + N₂ = (NO^- • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	89.1	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

( • 5 Nitrogen ) + = ( • 6)

By formula: (NO^- • 5N₂) + N₂ = (NO^- • 6N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	13. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	95.8	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

( • 6 Nitrogen ) + = ( • 7)

By formula: (NO^- • 6N₂) + N₂ = (NO^- • 7N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	95.4	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

( • 7 Nitrogen ) + = ( • 8)

By formula: (NO^- • 7N₂) + N₂ = (NO^- • 8N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	97.5	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

( • 8 Nitrogen ) + = ( • 9)

By formula: (NO^- • 8N₂) + N₂ = (NO^- • 9N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	81.6	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

( • 9 Nitrogen ) + = ( • 10)

By formula: (NO^- • 9N₂) + N₂ = (NO^- • 10N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.03	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.	J/mol*K	N/A	Hiraoka and Yamabe, 1989	gas phase; Entropy change calculated or estimated; M

NO₂⁺ + Nitrogen = (NO₂⁺ • )

By formula: NO₂⁺ + N₂ = (NO₂⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	76.1	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • Nitrogen ) + = (NO₂⁺ • 2)

By formula: (NO₂⁺ • N₂) + N₂ = (NO₂⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	82.4	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 2 Nitrogen ) + = (NO₂⁺ • 3)

By formula: (NO₂⁺ • 2N₂) + N₂ = (NO₂⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	87.4	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 3 Nitrogen ) + = (NO₂⁺ • 4)

By formula: (NO₂⁺ • 3N₂) + N₂ = (NO₂⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	90.8	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 4 Nitrogen ) + = (NO₂⁺ • 5)

By formula: (NO₂⁺ • 4N₂) + N₂ = (NO₂⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	108.	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 5 Nitrogen ) + = (NO₂⁺ • 6)

By formula: (NO₂⁺ • 5N₂) + N₂ = (NO₂⁺ • 6N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	71.1	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 6 Nitrogen ) + = (NO₂⁺ • 7)

By formula: (NO₂⁺ • 6N₂) + N₂ = (NO₂⁺ • 7N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	71.1	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 7 Nitrogen ) + = (NO₂⁺ • 8)

By formula: (NO₂⁺ • 7N₂) + N₂ = (NO₂⁺ • 8N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	74.9	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 8 Nitrogen ) + = (NO₂⁺ • 9)

By formula: (NO₂⁺ • 8N₂) + N₂ = (NO₂⁺ • 9N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.1	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 9 Nitrogen ) + = (NO₂⁺ • 10)

By formula: (NO₂⁺ • 9N₂) + N₂ = (NO₂⁺ • 10N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	86.2	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 10 Nitrogen ) + = (NO₂⁺ • 11)

By formula: (NO₂⁺ • 10N₂) + N₂ = (NO₂⁺ • 11N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	77.8	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

(NO₂⁺ • 11 Nitrogen ) + = (NO₂⁺ • 12)

By formula: (NO₂⁺ • 11N₂) + N₂ = (NO₂⁺ • 12N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	82.0	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989	gas phase; M

+ Nitrogen = ( • )

By formula: N₂⁺ + N₂ = (N₂⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	102. to 102.	kJ/mol	RNG	N/A	Range of 6 values; Individual data points
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	87.9	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rS°	67.8	J/mol*K	PHPMS	Teng and Conway, 1973	gas phase; M
Δ_rS°	81.6	J/mol*K	PHPMS	Payzant and Kebarle, 1970	gas phase; M
Δ_rS°	46.	J/mol*K	DT	Varney, 1968	gas phase; Entropy change is questionable; M
Δ_rS°	-4.	J/mol*K	DT	Varney, 1959	gas phase; Entropy change is questionable; M

( • Nitrogen ) + = ( • 2)

By formula: (N₂⁺ • N₂) + N₂ = (N₂⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.5 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rH°	5.9	kJ/mol	PI	Linn, Ono, et al., 1981	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	62.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 2 Nitrogen ) + = ( • 3)

By formula: (N₂⁺ • 2N₂) + N₂ = (N₂⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.3 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	66.1	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 3 Nitrogen ) + = ( • 4)

By formula: (N₂⁺ • 3N₂) + N₂ = (N₂⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.5 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	69.5	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 4 Nitrogen ) + = ( • 5)

By formula: (N₂⁺ • 4N₂) + N₂ = (N₂⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.3 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	85.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 5 Nitrogen ) + = ( • 6)

By formula: (N₂⁺ • 5N₂) + N₂ = (N₂⁺ • 6N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.5 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	90.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 6 Nitrogen ) + = ( • 7)

By formula: (N₂⁺ • 6N₂) + N₂ = (N₂⁺ • 7N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.5 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	85.4	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 7 Nitrogen ) + = ( • 8)

By formula: (N₂⁺ • 7N₂) + N₂ = (N₂⁺ • 8N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.8 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	80.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 8 Nitrogen ) + = ( • 9)

By formula: (N₂⁺ • 8N₂) + N₂ = (N₂⁺ • 9N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.4 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	81.6	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 9 Nitrogen ) + = ( • 10)

By formula: (N₂⁺ • 9N₂) + N₂ = (N₂⁺ • 10N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.4 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	86.6	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 10 Nitrogen ) + = ( • 11)

By formula: (N₂⁺ • 10N₂) + N₂ = (N₂⁺ • 11N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.9 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.5	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

N₃⁺ + Nitrogen = (N₃⁺ • )

By formula: N₃⁺ + N₂ = (N₃⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	83.7	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • Nitrogen ) + = (N₃⁺ • 2)

By formula: (N₃⁺ • N₂) + N₂ = (N₃⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.5	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • 2 Nitrogen ) + = (N₃⁺ • 3)

By formula: (N₃⁺ • 2N₂) + N₂ = (N₃⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	89.5	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • 3 Nitrogen ) + = (N₃⁺ • 4)

By formula: (N₃⁺ • 3N₂) + N₂ = (N₃⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	15. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	97.1	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • 4 Nitrogen ) + = (N₃⁺ • 5)

By formula: (N₃⁺ • 4N₂) + N₂ = (N₃⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	14. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	106.	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • 5 Nitrogen ) + = (N₃⁺ • 6)

By formula: (N₃⁺ • 5N₂) + N₂ = (N₃⁺ • 6N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	88.7	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • 6 Nitrogen ) + = (N₃⁺ • 7)

By formula: (N₃⁺ • 6N₂) + N₂ = (N₃⁺ • 7N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	80.8	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • 7 Nitrogen ) + = (N₃⁺ • 8)

By formula: (N₃⁺ • 7N₂) + N₂ = (N₃⁺ • 8N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	69.9	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • 8 Nitrogen ) + = (N₃⁺ • 9)

By formula: (N₃⁺ • 8N₂) + N₂ = (N₃⁺ • 9N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	68.2	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • 9 Nitrogen ) + = (N₃⁺ • 10)

By formula: (N₃⁺ • 9N₂) + N₂ = (N₃⁺ • 10N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	69.0	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

(N₃⁺ • 10 Nitrogen ) + = (N₃⁺ • 11)

By formula: (N₃⁺ • 10N₂) + N₂ = (N₃⁺ • 11N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6. ± 1.	kJ/mol	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	70.7	J/mol*K	PHPMS	Hiraoka and Yamabe, 1989, 2	gas phase; M

+ Nitrogen = ( • )

By formula: Na⁺ + N₂ = (Na⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	33.	kJ/mol	FA	Perry, Rowe, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	77.8	J/mol*K	FA	Perry, Rowe, et al., 1980	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
9.2	310.	FA	Perry, Rowe, et al., 1980	gas phase; M
8.4	310.	DT	Beyer and Keller, 1971	gas phase; low E/N; M

( • Nitrogen ) + = ( • 2)

By formula: (Na⁺ • N₂) + N₂ = (Na⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	22.	kJ/mol	FA	Perry, Rowe, et al., 1980	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	70.3	J/mol*K	FA	Perry, Rowe, et al., 1980	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
-1.	310.	FA	Perry, Rowe, et al., 1980	gas phase; M

+ Nitrogen = ( • )

By formula: Ni⁺ + N₂ = (Ni⁺ • N₂)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
111. (+10.,-0.)		CID	Khan, Steele, et al., 1995	gas phase; guided ion beam CID; M

( • Nitrogen ) + = ( • 2)

By formula: (Ni⁺ • N₂) + N₂ = (Ni⁺ • 2N₂)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
111. (+10.,-0.)		CID	Khan, Steele, et al., 1995	gas phase; guided ion beam CID; M

( • 2 Nitrogen ) + = ( • 3)

By formula: (Ni⁺ • 2N₂) + N₂ = (Ni⁺ • 3N₂)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
56. (+4.,-0.)		CID	Khan, Steele, et al., 1995	gas phase; guided ion beam CID; M

( • 3 Nitrogen ) + = ( • 4)

By formula: (Ni⁺ • 3N₂) + N₂ = (Ni⁺ • 4N₂)

Enthalpy of reaction

Δ_rH° (kJ/mol)	T (K)	Method	Reference	Comment
42.3 (+9.6,-0.)		CID	Khan, Steele, et al., 1995	gas phase; guided ion beam CID; M

+ Nitrogen = ( • )

By formula: O₂⁺ + N₂ = (O₂⁺ • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	21. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rH°	22.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; M
Δ_rH°	24.	kJ/mol	PHPMS	Janik and Conway, 1967	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	72.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rS°	66.1	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; M
Δ_rS°	79.1	J/mol*K	PHPMS	Janik and Conway, 1967	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
0.0	296.	FA	Howard, Bierbaum, et al., 1972	gas phase; M

( • Nitrogen ) + = ( • 2)

By formula: (O₂⁺ • N₂) + N₂ = (O₂⁺ • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	19. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rH°	18.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.9	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rS°	57.7	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M

( • 2 Nitrogen ) + = ( • 3)

By formula: (O₂⁺ • 2N₂) + N₂ = (O₂⁺ • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	18. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rH°	15.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	82.0	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Δ_rS°	50.6	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M

( • 3 Nitrogen ) + = ( • 4)

By formula: (O₂⁺ • 3N₂) + N₂ = (O₂⁺ • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	17. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	94.1	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
3.	204.	HPMS	Speller and Fitaire, 1983	gas phase; M

( • 4 Nitrogen ) + = ( • 5)

By formula: (O₂⁺ • 4N₂) + N₂ = (O₂⁺ • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.3 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	67.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
3.	184.	HPMS	Speller and Fitaire, 1983	gas phase; M

( • 5 Nitrogen ) + = ( • 6)

By formula: (O₂⁺ • 5N₂) + N₂ = (O₂⁺ • 6N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.3 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	67.4	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 6 Nitrogen ) + = ( • 7)

By formula: (O₂⁺ • 6N₂) + N₂ = (O₂⁺ • 7N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.5 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	77.4	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 7 Nitrogen ) + = ( • 8)

By formula: (O₂⁺ • 7N₂) + N₂ = (O₂⁺ • 8N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.8 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	80.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 8 Nitrogen ) + = ( • 9)

By formula: (O₂⁺ • 8N₂) + N₂ = (O₂⁺ • 9N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.9 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.9	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 9 Nitrogen ) + = ( • 10)

By formula: (O₂⁺ • 9N₂) + N₂ = (O₂⁺ • 10N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.0 ± 0.8	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	87.0	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • 10 Nitrogen ) + = ( • 11)

By formula: (O₂⁺ • 10N₂) + N₂ = (O₂⁺ • 11N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6. ± 1.	kJ/mol	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.5	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase; M

( • Nitrogen • ) + = ( • 2 • )

By formula: (O₂⁺ • N₂ • O₂) + N₂ = (O₂⁺ • 2N₂ • O₂)

Free energy of reaction

Δ_rG° (kJ/mol)	T (K)	Method	Reference	Comment
2.	230.	HPMS	Speller and Fitaire, 1983	gas phase; M

( • ) + Nitrogen = ( • • )

By formula: (O₂⁺ • O₂) + N₂ = (O₂⁺ • N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.	kJ/mol	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	42.3	J/mol*K	HPMS	Speller and Fitaire, 1983	gas phase; Entropy change is questionable; M

+ Nitrogen = ( • )

By formula: O₂^- + N₂ = (O₂^- • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	25. ± 4.2	kJ/mol	N/A	Posey and Johnson, 1988	gas phase; B
Δ_rH°	<56.90	kJ/mol	IMRB	Adams and Bohme, 1970	gas phase; N₂..O₂^- + O₂ -> O₄^-; B

( • Nitrogen • ) + = ( • 2 • )

By formula: (O₂^- • N₂ • O₂) + N₂ = (O₂^- • 2N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.7 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	74.9	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 2 Nitrogen • ) + = ( • 3 • )

By formula: (O₂^- • 2N₂ • O₂) + N₂ = (O₂^- • 3N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.3 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	76.6	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 3 Nitrogen • ) + = ( • 4 • )

By formula: (O₂^- • 3N₂ • O₂) + N₂ = (O₂^- • 4N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.0 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	78.2	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 4 Nitrogen • ) + = ( • 5 • )

By formula: (O₂^- • 4N₂ • O₂) + N₂ = (O₂^- • 5N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.1 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	81.6	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 5 Nitrogen • ) + = ( • 6 • )

By formula: (O₂^- • 5N₂ • O₂) + N₂ = (O₂^- • 6N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.6 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	81.6	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 6 Nitrogen • ) + = ( • 7 • )

By formula: (O₂^- • 6N₂ • O₂) + N₂ = (O₂^- • 7N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.1 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	78.7	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

( • 7 Nitrogen • ) + = ( • 8 • )

By formula: (O₂^- • 7N₂ • O₂) + N₂ = (O₂^- • 8N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7. ± 1.	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Δ_rH°	6.40	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; Entropy change calculated or estimated; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	74.9	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M
Δ_rS°	75.3	J/mol*K	N/A	Hiraoka, 1988	gas phase; Entropy change calculated or estimated; M

( • ) + Nitrogen = ( • • )

By formula: (O₂^- • O₂) + N₂ = (O₂^- • N₂ • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.0 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	69.0	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

O₃^- + Nitrogen = (O₃^- • )

By formula: O₃^- + N₂ = (O₃^- • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.3 ± 0.84	kJ/mol	TDAs	Hiraoka, 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	77.0	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-11.7 ± 2.1	kJ/mol	TDAs	Hiraoka, 1988	gas phase; B

(O₃^- • Nitrogen ) + = (O₃^- • 2)

By formula: (O₃^- • N₂) + N₂ = (O₃^- • 2N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	11.0 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	82.0	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 2 Nitrogen ) + = (O₃^- • 3)

By formula: (O₃^- • 2N₂) + N₂ = (O₃^- • 3N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	10.6 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	82.4	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 3 Nitrogen ) + = (O₃^- • 4)

By formula: (O₃^- • 3N₂) + N₂ = (O₃^- • 4N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	9.5 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.5	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 4 Nitrogen ) + = (O₃^- • 5)

By formula: (O₃^- • 4N₂) + N₂ = (O₃^- • 5N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.6 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	78.2	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 5 Nitrogen ) + = (O₃^- • 6)

By formula: (O₃^- • 5N₂) + N₂ = (O₃^- • 6N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	8.2 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	79.5	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 6 Nitrogen ) + = (O₃^- • 7)

By formula: (O₃^- • 6N₂) + N₂ = (O₃^- • 7N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.6 ± 0.8	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	76.1	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 7 Nitrogen ) + = (O₃^- • 8)

By formula: (O₃^- • 7N₂) + N₂ = (O₃^- • 8N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7. ± 1.	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	73.2	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 8 Nitrogen ) + = (O₃^- • 9)

By formula: (O₃^- • 8N₂) + N₂ = (O₃^- • 9N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6. ± 2.	kJ/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	70.7	J/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

O₄^- + Nitrogen + = N₂O₄^-

By formula: O₄^- + N₂ + O₂ = N₂O₄^-

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	12.1 ± 0.84	kJ/mol	TDAs	Hiraoka, 1988	gas phase; B
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-8.8 ± 2.1	kJ/mol	TDAs	Hiraoka, 1988	gas phase; B

References

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

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Notes

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

Symbols used in this document:

AE	Appearance energy
IE (evaluated)	Recommended ionization energy
S°_{gas,1 bar}	Entropy of gas at standard conditions (1 bar)
T	Temperature
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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