Accuracy

carbon, tetramer     43 Carbon, tetramer

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    #  Species Formula
    33 Cyclopropyl, cationC3H5
    34 Propenyl, cationC3H5
    35 AllylC3H5
    36 Cyclopropane (Geo)C3H6
    37 CyclopropaneC3H6
    38 PropeneC3H6
    39 Propene (Geo)C3H6
    40 i-Propyl radicalC3H7
    41 PropaneC3H8
    42 Propane (Geo)C3H8
    43 Carbon, tetramer C4
    44 Diacetylene (Geo)C4H2
    45 DiacetyleneC4H2
    46 CH2=C=C=CH2 (Geo)C4H4
    47 CH2=C=C=CH2C4H4
    48 Vinylacetylene (Geo)C4H4
    49 VinylacetyleneC4H4
    50 1-ButyneC4H6
    51 1,2-ButadieneC4H6
    52 2-ButyneC4H6
    53 1,3-ButadieneC4H6


ΔHf: 232.0 kcal/mol,     REF: M. W. Chase, C. A. Davies, J. R. Downey, D. R. Frurip, R. A. McDonald, A. N. Syverud, JANAF Thermochemical Tables, Third Edition, J. Phys. Chem. Ref. Data 14, Suppl. 1 (1985).
  
 UHF TRIPLET
Carbon, tetramer
 H=232.0 HR=JANAF86
  C     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.30710203 +1    0.0000000 +0    0.0000000 +0     1     0     0
  C     1.27946150 +1  179.9997851 +1  180.0000000 +0     2     1     0
  C     1.30710194 +1  179.9997488 +1 -170.0000000 +1     3     2     1