CH3 plus C2H4 - CH3CH2CH2 TS      2 CH3 plus C2H4 - CH3CH2CH2 TS

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    #  Species Formula
    43 HF2 TSHF2
    44 FCH3F TS 1CH3F2
    45 EP(-) plus CH3O(-) TSC3H7O5P
    46 REP(-) plus CH3O(-) TSC5H9O6P
    47 HClH TSH2Cl
    48 CH3 plus FCl - CH3F plus Cl TSCH3FCl
    49 F - CH3 - Cl(-) TS, forward reactionCH3FCl
    50 FCH3Cl TS 1CH3FCl
    51 Cl-CH3-Cl (-) TSCH3Cl2
     1 H plus C2H4 - CH3CH2 TSC2H5
     2 CH3 plus C2H4 - CH3CH2CH2 TS C3H7
     3 hc1 - Ring-opening cyclobutene TSC4H6
     4 hc5 - Cyclobutadiene TSC5H6
     5 hc4 - Pentadiene TSC5H8
     6 hc2 - Hexatriene to cyclohexadiene TSC6H8
     7 hc7 - Ethylene plus butadiene Diels-Alder TSC6H10
     8 hc6 - 1,5 Hexadiene TSC6H10
     9 hc8 - Cyclobutadiene plus ethylene TSC7H10
    10 hc3 - Dimethylene to cyclobuta - benzene TSC8H8
    11 hc10 - Cyclonona-1,4,7-triene TSC9H12
    12 hc9 - Two cyclopentadiene TSC10H12


ΔHf: 6.8 kcal/mol,     REF: Yan Zhao, Núria González-García, and Donald G. Truhlar, "Benchmark Database of Barrier Heights for Heavy Atom Transfer, Nucleophilic Substitution, Association, and Unimolecular Reactions and Its Use to Test Theoretical Methods" J. Phys.
  

      CH3 plus C2H4 - CH3CH2CH2 TS
      h=6.85+"CH3 plus C2H4" hr=zgt2005
  C     0.00000000  0    0.0000000  0    0.0000000  0     0     0     0
  C     2.20430000  1    0.0000000  0    0.0000000  0     1     0     0
  C     1.34961600  1   97.5873490  1    0.0000000  0     2     1     0
  H     1.06011500  1   94.4633690  1 -178.6337500  1     1     2     3
  H     1.06022800  1   98.2699350  1  119.8391330  1     1     2     4
  H     1.06011800  1   98.0960720  1  120.3444880  1     1     2     5
  H     1.08246600  1   91.0639760  1  123.2495770  1     2     1     3
  H     1.08237500  1   91.0428840  1  113.4979430  1     2     1     7
  H     1.07708200  1  123.2982520  1   89.3915960  1     3     2     1
  H     1.07703100  1  123.2840490  1 -178.7597050  1     3     2     9