1,4-Dimethyl-2,3-diaza-bicyclo[2.2.2]oct-2-ene

Formula: C₈H₁₄N₂
Molecular weight: 138.2102
IUPAC Standard InChI: InChI=1S/C8H14N2/c1-7-3-5-8(2,6-4-7)10-9-7/h3-6H2,1-2H3
IUPAC Standard InChIKey: HNKORYYGGBIIGK-UHFFFAOYSA-N
CAS Registry Number: 49570-30-1
Chemical structure:
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Gas phase thermochemistry data

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Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	92.4 ± 0.2	kJ/mol	Ccb	Engel, Wood, et al., 1974	see Engel, Melaugh, et al., 1976

Condensed phase thermochemistry data

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Data compiled by: Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_solid	20.4	kJ/mol	Ccb	Engel, Wood, et al., 1974	see Engel, Melaugh, et al., 1976
Quantity	Value	Units	Method	Reference	Comment
Δ_cH°_solid	-5169.3 ± 1.2	kJ/mol	Ccb	Engel, Wood, et al., 1974	see Engel, Melaugh, et al., 1976

Phase change data

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Data compiled as indicated in comments:
AC - William E. Acree, Jr., James S. Chickos
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
DRB - Donald R. Burgess, Jr.

Quantity	Value	Units	Method	Reference	Comment
Δ_subH°	72.0 ± 0.5	kJ/mol	C	Engel, Melaugh, et al., 1976	AC
Δ_subH°	71.96	kJ/mol	V	Engel, Wood, et al., 1974	see Engel, Melaugh, et al., 1976; ALS
Δ_subH°	72.0	kJ/mol	N/A	Engel, Wood, et al., 1974	DRB

References

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Engel, Wood, et al., 1974
Engel, P.S.; Wood, J.L.; Sweet, J.A.; Margrave, J.L., Thermochemistry of azoalkanes, J. Am. Chem. Soc., 1974, 96, 2381-2387. [all data]

Engel, Melaugh, et al., 1976
Engel, P.S.; Melaugh, R.A.; Mansson, M.; Timberlake, J.W.; Garner, A.W.; Rossini, F.D., Thermochemistry of nine diazenes (azo compounds), J. Chem. Thermodyn., 1976, 8, 607-621. [all data]

Notes

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Symbols used in this document:

Δ_cH°_solid	Enthalpy of combustion of solid at standard conditions
Δ_fH°_gas	Enthalpy of formation of gas at standard conditions
Δ_fH°_solid	Enthalpy of formation of solid at standard conditions
Δ_subH°	Enthalpy of sublimation at standard conditions

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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