Cyclohexane, 1,2-dimethyl-, cis-

Data at NIST subscription sites:

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.


Gas phase thermochemistry data

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

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled by: Glushko Thermocenter, Russian Academy of Sciences, Moscow

Quantity Value Units Method Reference Comment
gas374.34J/mol*KN/AHuffman H.M., 1949 

Constant pressure heat capacity of gas

Cp,gas (J/mol*K) Temperature (K) Reference Comment
39.4650.Thermodynamics Research Center, 1997p=1 bar. There is an appreciable difference, mainly at high temperatures, with values estimated earlier by a method of increments [ Beckett C.W., 1947].
64.53100.
84.76150.
103.4200.
137.7273.15
151.2298.15
152.3300.
208.3400.
259.3500.
302.2600.
338.0700.
368.1800.
393.7900.
415.51000.
434.11100.
450.01200.
463.61300.
475.41400.
485.51500.
505.21750.
519.32000.
529.62250.
537.32500.
543.22750.
547.83000.

Condensed phase thermochemistry data

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

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

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

Quantity Value Units Method Reference Comment
Δcliquid-5222. ± 1.8kJ/molCcbJohnson, Prosen, et al., 1947Corresponding Δfliquid = -210. kJ/mol (simple calculation by NIST; no Washburn corrections)

Gas phase ion energetics data

Go To: Top, Gas phase thermochemistry data, Condensed phase thermochemistry data, References, Notes

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Data compiled as indicated in comments:
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi
RDSH - Henry M. Rosenstock, Keith Draxl, Bruce W. Steiner, and John T. Herron

Ionization energy determinations

IE (eV) Method Reference Comment
≤9.78 ± 0.05EIHerzschuh and Sicker, 1981LLK
9.90 ± 0.07EILageot, 1971LLK
10.08 ± 0.02EINatalis, 1964RDSH

Appearance energy determinations

Ion AE (eV) Other Products MethodReferenceComment
C5H9+12.12 ± 0.05?EINatalis, 1964RDSH
C5H10+11.62 ± 0.08?EINatalis, 1964RDSH
C6H10+10.5 ± 0.12CH3EILageot, 1971LLK
C6H10+10.62 ± 0.04C2H6EINatalis, 1964RDSH
C6H11+11.06 ± 0.02C2H5EINatalis, 1964RDSH
C6H12+11.17 ± 0.02C2H4EINatalis, 1964RDSH
C7H13+10.63 ± 0.05CH3EIHerzschuh and Sicker, 1981LLK
C7H13+10.83 ± 0.05C2H5EIHerzschuh and Sicker, 1981LLK
C7H13+10.55 ± 0.05CH3EILageot, 1971LLK
C7H13+10.78 ± 0.02CH3EINatalis, 1964RDSH

References

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

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Huffman H.M., 1949
Huffman H.M., Low-temperature thermal data on eight C8H16 alkylcyclohexanes, J. Am. Chem. Soc., 1949, 71, 584-592. [all data]

Thermodynamics Research Center, 1997
Thermodynamics Research Center, Selected Values of Properties of Chemical Compounds., Thermodynamics Research Center, Texas A&M University, College Station, Texas, 1997. [all data]

Beckett C.W., 1947
Beckett C.W., The thermodynamic properties and molecular structure of cyclohexane, methylcyclohexane, ethylcyclohexane, and seven dimethylcyclohexanes, J. Am. Chem. Soc., 1947, 69, 2488-2495. [all data]

Johnson, Prosen, et al., 1947
Johnson, W.H.; Prosen, E.J.; Rossini, F.D., Heats of combustion and isomerization of the eight C8H16 alkylcyclohexanes, J. Res. NBS, 1947, 39, 49-52. [all data]

Herzschuh and Sicker, 1981
Herzschuh, R.; Sicker, A., Stereochemische einflusse auf die ionisations- und auftrittsenergien cis/trans-isomerer dimethylcycloalkane, Z. Chem., 1981, 21, 409. [all data]

Lageot, 1971
Lageot, C., Potentiel d'ionisation, potentiel d'apparition et courbes d'ionisation differentielle pour les 1-2 dimethylcyclohexanes cis et trans, Org. Mass Spectrom., 1971, 5, 839. [all data]

Natalis, 1964
Natalis, P., Etude du comportement d'isomeres geometriques sous l'impact electronique. V. Comparaison des donnees obtenues, par differentes methodes, pour les 1,2-dimethylcyclohexanes cis et trans, Bull. Soc. Chim. Belges, 1964, 73, 961. [all data]


Notes

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