Accuracy

carbon, tetramer    104 Carbon, tetramer

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    #  Species Formula
    94 CyclopropaneC3H6
    95 PropeneC3H6
    96 Propene (Geo)C3H6
    97 i-Propyl radicalC3H7
    98 PropaneC3H8
    99 Propane (Geo)C3H8
   100 Isopropyl lithiumH7LiC3
   101 Isopropyl lithium (Geo)H7LiC3
   102 Trimethyborane (Geo)H9BC3
   103 TrimethylboraneH9BC3
   104 Carbon, tetramer C4
   105 Diacetylene (Geo)C4H2
   106 DiacetyleneC4H2
   107 CH2=C=C=CH2 (Geo)C4H4
   108 CH2=C=C=CH2C4H4
   109 Vinylacetylene (Geo)C4H4
   110 VinylacetyleneC4H4
   111 1,2-ButadieneC4H6
   112 1,3-ButadieneC4H6
   113 1-ButyneC4H6
   114 2-ButyneC4H6


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 PM7
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