Ozone anion

Formula: O₃^-
Molecular weight: 47.9987
CAS Registry Number: 12596-80-4
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Gas phase thermochemistry data

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Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	-14.610 ± 0.060	kcal/mol	R-EA	Novich, Engelking, et al., 1979

Reaction thermochemistry data

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

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Individual Reactions

O₃^- + = (O₃^- • )

By formula: O₃^- + N₂ = (O₃^- • N₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.70 ± 0.20	kcal/mol	TDAs	Hiraoka, 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.4	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-2.80 ± 0.50	kcal/mol	TDAs	Hiraoka, 1988	gas phase; B

O₃^- + = (O₃^- • )

By formula: O₃^- + O₂ = (O₃^- • O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.10 ± 0.20	kcal/mol	TDAs	Hiraoka, 1988	gas phase; B,M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.0	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rG°	-3.60 ± 0.50	kcal/mol	TDAs	Hiraoka, 1988	gas phase; B

(O₃^- • 4) + = (O₃^- • 5)

By formula: (O₃^- • 4O₂) + O₂ = (O₃^- • 5O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.54	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; Δ_rH, Δ_rS approximate; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	16.4	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; Δ_rH, Δ_rS approximate; M

(O₃^- • 2) + = (O₃^- • 3)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.5 ± 0.2	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.7	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 2) + = (O₃^- • 3)

By formula: (O₃^- • 2O₂) + O₂ = (O₃^- • 3O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.0 ± 0.3	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.0	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 3) + = (O₃^- • 4)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.3 ± 0.2	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	20.2	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 3) + = (O₃^- • 4)

By formula: (O₃^- • 3O₂) + O₂ = (O₃^- • 4O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.6 ± 0.3	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	15.4	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 4) + = (O₃^- • 5)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.1 ± 0.2	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.7	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 5) + = (O₃^- • 6)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.0 ± 0.2	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.0	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 6) + = (O₃^- • 7)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.8 ± 0.2	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	18.2	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 7) + = (O₃^- • 8)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.7 ± 0.3	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	17.5	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 8) + = (O₃^- • 9)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	1.5 ± 0.4	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	16.9	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • ) + = (O₃^- • 2)

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

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.6 ± 0.2	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.6	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • ) + = (O₃^- • 2)

By formula: (O₃^- • O₂) + O₂ = (O₃^- • 2O₂)

Quantity	Value	Units	Method	Reference	Comment
Δ_rH°	2.0 ± 0.2	kcal/mol	PHPMS	Hiraoka, 1988	gas phase; M
Quantity	Value	Units	Method	Reference	Comment
Δ_rS°	19.4	cal/mol*K	PHPMS	Hiraoka, 1988	gas phase; M

(O₃^- • 2) + = (O₃^- • 3)

By formula: (O₃^- • 2H₂O) + H₂O = (O₃^- • 3H₂O)

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
4.5	296.	FA	Fehsenfeld and Ferguson, 1974	gas phase; M

(O₃^- • ) + = (O₃^- • 2)

By formula: (O₃^- • H₂O) + H₂O = (O₃^- • 2H₂O)

Free energy of reaction

Δ_rG° (kcal/mol)	T (K)	Method	Reference	Comment
6.2	296.	FA	Fehsenfeld and Ferguson, 1974	gas phase; M

References

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

Novich, Engelking, et al., 1979
Novich, S.E.; Engelking, P.C.; Jones, P.L.; Futrell, J.H.; Lineberger, W.C., Laser photoelectron, photodetachment, and photodestruction spectra of O₃-, J. Chem. Phys., 1979, 70, 2652. [all data]

Hiraoka, 1988
Hiraoka, K., Determination of the Stabilities of O₃^-(N₂)n, O₃^-(O₂)n, and O₄^-(N₂)n from Measurements of the Gas Phase Equilibria, Chem. Phys., 1988, 125, 2-3, 439, https://doi.org/10.1016/0301-0104(88)87096-4 . [all data]

Fehsenfeld and Ferguson, 1974
Fehsenfeld, F.C.; Ferguson, E.E., Laboratory studies of negative ion reactions with atmospheric trace constituents, J. Chem. Phys., 1974, 61, 3181. [all data]

Notes

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

Symbols used in this document:

T	Temperature
Δ_fH°_gas	Enthalpy of formation of gas at standard conditions
Δ_rG°	Free energy of reaction at standard conditions
Δ_rH°	Enthalpy of reaction at standard conditions
Δ_rS°	Entropy of reaction at standard conditions

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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