Accuracy

cyclopentadiene     80 Cyclopentadiene

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    #  Species Formula
    70 trans-2-Butene (Geo)C4H8
    71 trans-2-ButeneC4H8
    72 Isobutyl, cationC4H9
    73 IsobutylC4H9
    74 n-Butane (Geo)C4H10
    75 Isobutane (Geo)C4H10
    76 IsobutaneC4H10
    77 n-Butane, transC4H10
    78 Cyclopentadienyl, anionC5H5
    79 Cyclopentadiene (Geo)C5H6
    80 Cyclopentadiene C5H6
    81 1,2-Dimethyl cyclopropeneC5H8
    82 1,4-PentadieneC5H8
    83 Bicyclo(2.1.0)-pentaneC5H8
    84 1,cis-3-PentadieneC5H8
    85 CyclopenteneC5H8
    86 1,trans-3-PentadieneC5H8
    87 IsopreneC5H8
    88 Methylene cyclobutaneC5H8
    89 Spiropentane (Geo)C5H8
    90 SpiropentaneC5H8


ΔHf: 32.1 kcal/mol,     REF: J. B. Pedley, B. S. Iseard, "CATCH Tables of Silicon Compounds," University of Sussex, 1972
Dipole: 0.4 Debye,     REF: R. D. Nelson, D. R. Lide, A. A. Maryott, Nat. Stand. Ref. Data Set., Natl. Bur. Stand. No. 10 (1967).
I.P.: 8.6 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.
  
 SYMMETRY
Cyclopentadiene
 D=0.42 I=8.57 IR=LLNBS82 H=32.1 HR=CATCH DR=NLM1967
 
  C     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
 XX     0.73389945 +1    0.0000000 +0    0.0000000 +0     1     0     0
 XX     1.00000000 +0   90.0000000 +0    0.0000000 +0     2     1     0
  C     0.73389945 +0   90.0000000 +0  180.0000000 +0     2     3     1
  C     1.35312041 +1  109.2138989 +1    0.0000000 +0     4     1     3
  C     1.35312041 +0  109.2138989 +0    0.0000000 +0     1     4     5
  C     2.22226399 +1   90.0000000 +0    0.0000000 +0     2     1     6
  H     1.06925380 +1  128.9000717 +1  180.0000000 +0     6     1     4
  H     1.07202368 +1  128.0779668 +1  180.0000000 +0     1     6     7
  H     1.07202368 +0  128.0779668 +0  180.0000000 +0     4     5     7
  H     1.06925380 +0  128.9000717 +0  180.0000000 +0     5     4     1
  H     1.10543321 +1  126.6644401 +1   90.0000000 +0     7     2     1
  H     1.10543321 +0  126.6644401 +0  -90.0000000 +0     7     2     1
 
   2  1    4
   5  1    6
   5  2    6
   8  1   11
   8  2   11
   9  1   10
   9  2   10
  12  1   13
  12  2   13