Accuracy

ch4r     10 Methane (Geo)

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    #  Species Formula
  1949 IodoformHCI3
     1 Hydrogen, atomH
     2 Hydrogen (Geo)H2
     3 HydrogenH2
     4 Carbon, atomC
     5 MethylidyneHC
     6 Methylene, singlet (Geo)CH2
     7 Methylene, triplet (Geo)CH2
     8 Methylene, singletCH2
     9 Methyl, cationCH3
    10 Methane (Geo) CH4
    11 MethaneCH4
    12 AcetyleneC2H2
    13 Acetylene (Geo)C2H2
    14 Vinyl, cationC2H3
    15 VinylC2H3
    16 Ethylene, cationC2H4
    17 Ethylene (Geo)C2H4
    18 EthyleneC2H4
    19 MethylmethyleneC2H4
    20 Ethyl, cationC2H5


REF: G. Herzberg, "Molecular Spectra and Molecular Structure III. Electronic Spectra and Electronic Structure of Polyatomic Molecules," Van Nostrand, New York, N.Y., 1966.
  
 SYMMETRY
Methane
 GR=HERZ1966 <C-H>
 
  H     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.09400000 +1    0.0000000 +0    0.0000000 +0     1     0     0
  H     1.09400000 +0  109.4712210 +0    0.0000000 +0     2     1     0
  H     1.09400000 +0  109.4712210 +1 -120.0000000 +0     2     1     3
  H     1.09400000 +0  109.4712210 +0  120.0000000 +0     2     1     3
 
   2  1    3    4    5