Nitrogen cation

Formula: N₂⁺
Molecular weight: 28.0129
IUPAC Standard InChI: InChI=1S/N2/c1-2/q+1
IUPAC Standard InChIKey: OCLMUTJUZGFVFC-UHFFFAOYSA-N
CAS Registry Number: 13966-04-6
Chemical structure:
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Gas phase thermochemistry data

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Quantity	Value	Units	Method	Reference	Comment
S°_{gas,1 bar}	197.65	J/mol*K	Review	Chase, 1998	Data last reviewed in September, 1977

Reaction thermochemistry data

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Data compiled by: Michael M. Meot-Ner (Mautner) and Sharon G. Lias

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.

Individual Reactions

Nitrogen cation + = ( • )

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
Δ_rS°	67.8	J/mol*K	PHPMS	Teng and Conway, 1973	gas phase
Δ_rS°	81.6	J/mol*K	PHPMS	Payzant and Kebarle, 1970	gas phase
Δ_rS°	46.	J/mol*K	DT	Varney, 1968	gas phase; Entropy change is questionable
Δ_rS°	-4.	J/mol*K	DT	Varney, 1959	gas phase; Entropy change is questionable

Nitrogen cation + = ( • )

By formula: N₂⁺ + Ar = (N₂⁺ • Ar)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	112.	kJ/mol	PD/KERD	Kim and Bowers, 1990	gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988
Δ_rH°	106.	kJ/mol	PHPMS	Teng and Conway, 1973	gas phase; switching reaction(N2+)N2
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	81.6	J/mol*K	PD/KERD	Kim and Bowers, 1990	gas phase; switching reaction(N2+)N2; Hiraoka and Nakajima, 1988
Δ_rS°	57.3	J/mol*K	PHPMS	Teng and Conway, 1973	gas phase; switching reaction(N2+)N2

( Nitrogen cation • 7) + = ( • 8)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.40	kJ/mol	PHPMS	Hiraoka, Mori, et al., 1992	gas phase; Entropy change calculated or estimated
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	71.	J/mol*K	N/A	Hiraoka, Mori, et al., 1992	gas phase; Entropy change calculated or estimated

( Nitrogen cation • 8) + = ( • 9)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.36	kJ/mol	PHPMS	Hiraoka, Mori, et al., 1992	gas phase; Entropy change calculated or estimated
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	71.	J/mol*K	N/A	Hiraoka, Mori, et al., 1992	gas phase; Entropy change calculated or estimated

( Nitrogen cation • ) + = ( • 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
Δ_rH°	5.9	kJ/mol	PI	Linn, Ono, et al., 1981	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	62.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • ) + = ( • 2)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	16.	kJ/mol	PHPMS	Hiraoka, Mori, et al., 1992	gas phase; Δ_rH>
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	71.	J/mol*K	PHPMS	Hiraoka, Mori, et al., 1992	gas phase; Δ_rH>

( Nitrogen cation • 10) + = ( • 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
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	84.5	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • 9) + = ( • 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
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	86.6	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • 2) + = ( • 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
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	66.1	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • 3) + = ( • 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
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	69.5	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • 4) + = ( • 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
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	85.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • 5) + = ( • 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
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	90.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • 6) + = ( • 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
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	85.4	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • 7) + = ( • 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
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	80.8	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • 8) + = ( • 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
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	81.6	J/mol*K	PHPMS	Hiraoka and Nakajima, 1988	gas phase

( Nitrogen cation • 2) + = ( • 3)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.3 ± 0.8	kJ/mol	PHPMS	Hiraoka, Mori, et al., 1992	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	57.3	J/mol*K	PHPMS	Hiraoka, Mori, et al., 1992	gas phase

( Nitrogen cation • 3) + = ( • 4)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	7.0 ± 0.8	kJ/mol	PHPMS	Hiraoka, Mori, et al., 1992	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	74.9	J/mol*K	PHPMS	Hiraoka, Mori, et al., 1992	gas phase

( Nitrogen cation • 4) + = ( • 5)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.6 ± 0.8	kJ/mol	PHPMS	Hiraoka, Mori, et al., 1992	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	71.1	J/mol*K	PHPMS	Hiraoka, Mori, et al., 1992	gas phase

( Nitrogen cation • 5) + = ( • 6)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.5 ± 0.8	kJ/mol	PHPMS	Hiraoka, Mori, et al., 1992	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	72.8	J/mol*K	PHPMS	Hiraoka, Mori, et al., 1992	gas phase

( Nitrogen cation • 6) + = ( • 7)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	6.4 ± 0.8	kJ/mol	PHPMS	Hiraoka, Mori, et al., 1992	gas phase
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	72.4	J/mol*K	PHPMS	Hiraoka, Mori, et al., 1992	gas phase

Nitrogen cation + = ( • )

By formula: N₂⁺ + He = (N₂⁺ • He)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.	kJ/mol	PDiss	Bieske, Soliva, et al., 1990	gas phase; same Δ_rH for N2+(B) and (N2+)X; ab initio, Miller, Tennyson, et al., 1988

References

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

Hiraoka and Nakajima, 1988
Hiraoka, K.; Nakajima, G., A Determination of the Stabilities of N2+(N2)n and O2+(N2)n with n = 1 - 11 from Measurements of the Gas - Phase Ion Equilibria, J. Chem. Phys., 1988, 88, 12, 7709, https://doi.org/10.1063/1.454285 . [all data]

Teng and Conway, 1973
Teng, H.H.; Conway, D.C., Ion - Molecule Equilibria in Mixtures of N2 and Ar, J. Chem. Phys., 1973, 59, 5, 2316, https://doi.org/10.1063/1.1680338 . [all data]

Payzant and Kebarle, 1970
Payzant, J.D.; Kebarle, P., Clustering Equilibrium N2+ + 2N2 = N4+ + N2 and the Bond Dissociation Energy of N4+, J. Chem. Phys., 1970, 53, 12, 4723, https://doi.org/10.1063/1.1674010 . [all data]

Varney, 1968
Varney, R.N., Equilibrium Constant and Rates for the Reversible Reaction N4+ -> N2+ + N2, Phys. Rev., 1968, 174, 1, 165, https://doi.org/10.1103/PhysRev.174.165 . [all data]

Varney, 1959
Varney, R.N., Molecular Ions, J. Chem. Phys., 1959, 31, 5, 1314, https://doi.org/10.1063/1.1730590 . [all data]

Kim and Bowers, 1990
Kim, H.S.; Bowers, M.T., Energetics, Structure and Photodissociation Dynamics of the Cluster Ar.N2+, J. Chem. Phys., 1990, 93, 2, 1158, https://doi.org/10.1063/1.459179 . [all data]

Hiraoka, Mori, et al., 1992
Hiraoka, K.; Mori, T.; Yamabe, S., Gas-Phase Solvation of N2+ with Ar Atoms - A Charge Switch in the Reaction N2+(Ar)...Ar+(N2), Chem. Phys. Lett., 1992, 189, 1, 7, https://doi.org/10.1016/0009-2614(92)85144-Y . [all data]

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

Bieske, Soliva, et al., 1990
Bieske, E.J.; Soliva, A.; Welker, M.A.; Maier, J.P., The B<---X Electronic Spectrum of N2+ He, J. Chem. Phys., 1990, 93, 6, 4477, https://doi.org/10.1063/1.458732 . [all data]

Miller, Tennyson, et al., 1988
Miller, S.; Tennyson, J.; Follmeg, B.; Rosmus, P.; Werner, H., Ab initio Investigation of the Bond Rovibrational States in the Electronic Ground State of HeN2+, J. Chem. Phys., 1988, 89, 4, 2178, https://doi.org/10.1063/1.455062 . [all data]

Notes

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Symbols used in this document:

S°_{gas,1 bar} Entropy of gas at standard conditions (1 bar)

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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S°_{gas,1 bar}	Entropy of gas at standard conditions (1 bar)
Δ_rH°	Enthalpy of reaction at standard conditions
Δ_rS°	Entropy of reaction at standard conditions