Spiro[5.5]undecane

Formula: C₁₁H₂₀
Molecular weight: 152.2765
IUPAC Standard InChI: InChI=1S/C11H20/c1-3-7-11(8-4-1)9-5-2-6-10-11/h1-10H2
IUPAC Standard InChIKey: NECLQTPQJZSWOE-UHFFFAOYSA-N
CAS Registry Number: 180-43-8
Chemical structure:
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Other names: Spiro(5,5)undecane
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- Phase change data
- Mass spectrum (electron ionization)
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Gas phase thermochemistry data

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

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	-45.01 ± 0.75	kcal/mol	Ccb	Subach and Zwolinski, 1975	ALS
Δ_fH°_gas	-45.84	kcal/mol	N/A	Kozin, Mirzaeva, et al., 1964	Value computed using Δ_fH_liquid° value of -248.0±2.0 kj/mol from Kozin, Mirzaeva, et al., 1964 and Δ_vapH° value of 56.2 kj/mol from Subach and Zwolinski, 1975.; DRB

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°_liquid	-58.44 ± 0.72	kcal/mol	Ccb	Subach and Zwolinski, 1975
Δ_fH°_liquid	-59.3 ± 0.5	kcal/mol	Ccb	Kozin, Mirzaeva, et al., 1964
Quantity	Value	Units	Method	Reference	Comment
Δ_cH°_liquid	-1659.28 ± 0.67	kcal/mol	Ccb	Subach and Zwolinski, 1975	Corresponding Δ_fHº_liquid = -58.43 kcal/mol (simple calculation by NIST; no Washburn corrections)
Δ_cH°_liquid	-1658.4 ± 0.5	kcal/mol	Ccb	Kozin, Mirzaeva, et al., 1964	Corresponding Δ_fHº_liquid = -59.3 kcal/mol (simple calculation by NIST; no Washburn corrections)

References

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Subach and Zwolinski, 1975
Subach, D.J.; Zwolinski, B.J., Enthalpies of combustion, formation, and vaporization of spiro[4,5]decane, spiro[5,5]undecane, and 7-n-Hexadecylspiro[4,5]decane, J. Chem. Eng. Data, 1975, 20, 232-235. [all data]

Kozin, Mirzaeva, et al., 1964
Kozin, M.P.; Mirzaeva, A.K.; Sosina, I.E.; Elagina, N.V.; Skuratov, S.M., The heats of formation of spiro hydrocarbons, Dokl. Phys. Chem. (Engl. Transl.), 1964, 155, 375-377. [all data]

Notes

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Symbols used in this document:

Δ_cH°_liquid	Enthalpy of combustion of liquid at standard conditions
Δ_fH°_gas	Enthalpy of formation of gas at standard conditions
Δ_fH°_liquid	Enthalpy of formation of liquid at standard conditions

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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