Accuracy

cyclopentene     85 Cyclopentene

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    #  Species Formula
    75 Isobutane (Geo)C4H10
    76 IsobutaneC4H10
    77 n-Butane, transC4H10
    78 Cyclopentadienyl, anionC5H5
    79 Cyclopentadiene (Geo)C5H6
    80 CyclopentadieneC5H6
    81 1,2-Dimethyl cyclopropeneC5H8
    82 1,4-PentadieneC5H8
    83 Bicyclo(2.1.0)-pentaneC5H8
    84 1,cis-3-PentadieneC5H8
    85 Cyclopentene C5H8
    86 1,trans-3-PentadieneC5H8
    87 IsopreneC5H8
    88 Methylene cyclobutaneC5H8
    89 Spiropentane (Geo)C5H8
    90 SpiropentaneC5H8
    91 Cyclopentyl, cationC5H9
    92 2-Methyl-2-buteneC5H10
    93 cis-2-PenteneC5H10
    94 cis-DimethylcyclopropaneC5H10
    95 CyclopentaneC5H10


ΔHf: 8.3 kcal/mol,     REF: J. B. Pedley, B. S. Iseard, "CATCH Tables of Silicon Compounds," University of Sussex, 1972
Dipole: 0.2 Debye,     REF: R. D. Nelson, D. R. Lide, A. A. Maryott, Nat. Stand. Ref. Data Set., Natl. Bur. Stand. No. 10 (1967).
I.P.: 9.2 eV,     REF: R. D. Levin, S. G. Lias, "Ionization Potentials and Appearance Potential Measurements," 1971-1981, Natl. Stand. Ref. Data Ser., Natl. Bur. Stand. 71, (1982), Cat. No. C13.48:71.
  

Cyclopentene
 I=9.18 IR=LLNBS82 D=0.20 H=8.3 HR=CATCH DR=NLM1967
  C     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.55143910 +1    0.0000000 +0    0.0000000 +0     1     0     0
  C     1.55136049 +1  105.9559237 +1    0.0000000 +0     2     1     0
  C     1.50372659 +1  104.7654476 +1    0.1325576 +1     3     2     1
  C     1.33828950 +1  112.2491316 +1   -0.0847907 +1     4     3     2
  H     1.10311039 +1  111.4905191 +1  120.4417853 +1     1     2     3
  H     1.10309820 +1  111.5019869 +1 -120.7416504 +1     1     2     3
  H     1.09945051 +1  111.0496785 +1  120.8291246 +1     2     3     4
  H     1.09946990 +1  111.0515381 +1 -120.5699859 +1     2     3     4
  H     1.10318360 +1  111.3162615 +1  120.5676015 +1     3     4     5
  H     1.10316218 +1  111.3380141 +1 -120.7586329 +1     3     4     5
  H     1.07383363 +1  127.7044735 +1  179.9944624 +1     4     5     1
  H     1.07388180 +1  120.0757838 +1 -179.9184848 +1     5     1     2