Accuracy

methyl cyclopropene    119 Methyl cyclopropene

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    #  Species Formula
   109 Vinylacetylene (Geo)C4H4
   110 VinylacetyleneC4H4
   111 1,2-ButadieneC4H6
   112 1,3-ButadieneC4H6
   113 1-ButyneC4H6
   114 2-ButyneC4H6
   115 Bicyclobutane (Geo)C4H6
   116 BicyclobutaneC4H6
   117 2-Butyne (Geo)C4H6
   118 CyclobuteneC4H6
   119 Methyl cyclopropene C4H6
   120 MethylenecyclopropaneC4H6
   121 1,3-Butadiene (Geo)C4H6
   122 2-Butenyl, cationC4H7
   123 Cyclobutyl, cationC4H7
   124 1-ButeneC4H8
   125 1-Butene (Geo)C4H8
   126 cis-2-ButeneC4H8
   127 Cyclobutane (Geo)C4H8
   128 CyclobutaneC4H8
   129 Isobutene (Geo)C4H8


ΔHf: 58.2 kcal/mol,     REF: J. O. Cox, G. Pilcher, "Thermochemistry of Organic and Organometallic Compounds," Academic Press, New York, N.Y., 1970.
  
 PM7
Methyl cyclopropene
 HR=C&P1970 H=58.2
  C     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.50260821 +1    0.0000000 +0    0.0000000 +0     1     0     0
  C     1.50386740 +1   51.8332215 +1    0.0000000 +0     2     1     0
  C     1.44466288 +1  142.7297820 +1  179.9923790 +1     3     2     1
  H     1.03959824 +1  142.2938553 +1  179.9993874 +1     1     2     3
  H     1.08523035 +1  120.8518870 +1 -107.0309688 +1     2     1     3
  H     1.08522849 +1  120.8646132 +1  107.0403067 +1     2     1     3
  H     1.10301475 +1  112.2530966 +1   -0.1337170 +1     4     3     2
  H     1.10496078 +1  111.5951357 +1  120.2309457 +1     4     3     2
  H     1.10495789 +1  111.6075647 +1 -120.5175424 +1     4     3     2