Accuracy

vinyl, cation     61 Vinyl, cation

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    #  Species Formula
    51 Methylene, singletCH2
    52 Methylene, tripletCH2
    53 Methyl, cationCH3
    54 Methane (Geo)CH4
    55 MethaneCH4
    56 Methyl lithium (Geo)H3LiC
    57 Methyl lithiumH3LiC
    58 Carbon, dimer (Geo)C2
    59 AcetyleneC2H2
    60 Acetylene (Geo)C2H2
    61 Vinyl, cation C2H3
    62 VinylC2H3
    63 Ethylene, cationC2H4
    64 Ethylene (Geo)C2H4
    65 EthyleneC2H4
    66 MethylmethyleneC2H4
    67 Ethyl, cationC2H5
    68 Ethyl radicalC2H5
    69 Ethane (Geo)C2H6
    70 EthaneC2H6
    71 Lithium acetylide (Geo)HLiC2


ΔHf: 266.0 kcal/mol,     REF: F. P. Lossing, Can J. Chem., 49, 357 (1971).
  
 CHARGE=1 PM7
Vinyl, cation
 H=266 HR=FPL1971
  C     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.25873256 +1    0.0000000 +0    0.0000000 +0     1     0     0
 XX     1.00000000 +0   90.0000000 +0    0.0000000 +0     2     1     0
  H     1.06722442 +1  179.9994352 +1  180.0000000 +0     2     1     3
  H     1.12354917 +1  130.1359094 +1   22.7209637 +1     1     2     3
  H     1.12357697 +1  130.1132466 +1 -157.2938347 +1     1     2     3