Cyclopentane, 1,2-dimethyl-, trans-

• Formula: C₇H₁₄
• Molecular weight: 98.1861
• IUPAC Standard InChI: InChI=1S/C7H14/c1-6-4-3-5-7(6)2/h6-7H,3-5H2,1-2H3/t6-,7-/m0/s1 Copy

  
• IUPAC Standard InChIKey: RIRARCHMRDHZAR-BQBZGAKWSA-N Copy
• CAS Registry Number: 822-50-4
• Chemical structure:
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• Stereoisomers:
  • Cyclopentane, 1,2-dimethyl-, cis-
  • Cyclopentane, 1,2-dimethyl-
• Other names: trans-1,2-Dimethylcyclopentane; 1,trans-2-Dimethylcyclopentane; 1,2-Dimethylcyclopentane, trans; t-1,2-Dimethylcyclopentane; (E)-1,2-Dimethylcyclopentane; Cyclopentane, 1,2-dimethyl-
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• Information on this page:
  • Gas phase thermochemistry data
  • Gas phase ion energetics data
  • IR Spectrum
  • References
  • Notes
• Other data available:
  • Condensed phase thermochemistry data
  • Phase change data
  • Reaction thermochemistry data
  • Mass spectrum (electron ionization)
  • Gas Chromatography
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Gas phase thermochemistry data

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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:
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
GT - Glushko Thermocenter, Russian Academy of Sciences, Moscow

Constant pressure heat capacity of gas

Gas phase ion energetics data

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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:
LL - Sharon G. Lias and Joel F. Liebman
LLK - Sharon G. Lias, Rhoda D. Levin, and Sherif A. Kafafi

Ionization energy determinations

Appearance energy determinations

IR Spectrum

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

Data compiled by: Coblentz Society, Inc.

Condensed Phase Spectrum

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Notice: Except where noted, spectra from this collection were measured on dispersive instruments, often in carefully selected solvents, and hence may differ in detail from measurements on FTIR instruments or in other chemical environments. More information on the manner in which spectra in this collection were collected can be found here.

Notice: Concentration information is not available for this spectrum and, therefore, molar absorptivity values cannot be derived.

Additional Data

References

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

Johnson, Prosen, et al., 1949
Johnson, W.H.; Prosen, E.J.; Rossini, F.D., Heats of combustion and isomerization of the six C₇H₁₄ alkylcyclopentanes, J. Res. NBS, 1949, 42, 251-255. [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]

Epstein M.B., 1949
Epstein M.B., Heats, equilibrium constants, and free energies of formation of the dimethylcyclopentanes, J. Res. Nat. Bur. Stand., 1949, 43, 245-250. [all data]

Holmes and Lossing, 1991
Holmes, J.L.; Lossing, F.P., Ionization energies of homologous organic compounds and correlation with molecular size, Org. Mass Spectrom., 1991, 26, 537. [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]

Notes

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• Symbols used in this document:
  

  AE	Appearance energy
  Cp,gas	Constant pressure heat capacity of gas
  ΔfH°gas	Enthalpy of formation of gas at standard conditions

• Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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