Accuracy

cis-2-butene    126 cis-2-Butene

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    #  Species Formula
   116 BicyclobutaneC4H6
   117 2-Butyne (Geo)C4H6
   118 CyclobuteneC4H6
   119 Methyl cyclopropeneC4H6
   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-Butene C4H8
   127 Cyclobutane (Geo)C4H8
   128 CyclobutaneC4H8
   129 Isobutene (Geo)C4H8
   130 IsobuteneC4H8
   131 trans-2-Butene (Geo)C4H8
   132 trans-2-ButeneC4H8
   133 Isobutyl, cationC4H9
   134 IsobutylC4H9
   135 n-Butane (Geo)C4H10
   136 Isobutane (Geo)C4H10


ΔHf: -1.9 kcal/mol,     REF: J. O. Cox, G. Pilcher, "Thermochemistry of Organic and Organometallic Compounds," Academic Press, New York, N.Y., 1970.
  
 SYMMETRY PM7
cis-2-Butene
 HR=C&P1970 H=-1.86,0.20
 
  C     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.33814598 +1    0.0000000 +0    0.0000000 +0     1     0     0
 XX     1.00000000 +0   90.0000000 +0    0.0000000 +0     2     1     0
  C     1.48914231 +1  123.8441220 +1    0.0001906 +1     2     1     3
  C     1.48914231 +0  123.8441220 +0    0.0001906 +0     1     2     3
  H     1.08851132 +1  120.9708016 +1  179.9995720 +1     1     2     3
  H     1.08851132 +0  120.9708016 +0  179.9995720 +0     2     1     3
  H     1.10018514 +1  111.3406254 +1   59.6245808 +1     4     2     1
  H     1.09696669 +1  112.4412045 +1 -179.9657206 +1     4     2     1
  H     1.10018384 +1  111.3423996 +1  -59.5541799 +1     4     2     1
  H     1.10018514 +0  111.3406254 +0   59.6245808 +0     5     1     2
  H     1.09696669 +0  112.4412045 +1 -179.9657206 +0     5     1     2
  H     1.10018384 +1  111.3423996 +1  -59.5541799 +0     5     1     2
 
   4  1    5
   4  2    5
   4  3    5
   6  1    7
   6  2    7
   6  3    7
   8  1   11
   8  2   11
   8  3   11
   9  1   12
   9  2   12
   9  3   12
  10  1   13
  10  2   13
  10  3   13