Accuracy

pchr   1950 Methinophosphide (Geo)

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    #  Species Formula
  1940 PhosphinideneHP
  1941 PhosphinoH2P
  1942 Phosphine cationH3P
  1943 Phosphine (Geo)H3P
  1944 PhosphineH3P
  1945 PH4(+)H4P
  1946 Carbon monophosphideCP
  1947 Carbon phosphide (Geo)CP
  1948 MethinophosphideHCP
  1949 MethinophosphineHCP
  1950 Methinophosphide (Geo) HCP
  1951 Methylphosphine (Geo)CH5P
  1952 MethylphosphineCH5P
  1953 PhosphetetheneC2H5P
  1954 DimethylphosphineC2H7P
  1955 EthylphosphineC2H7P
  1956 Trimethylphosphine (Geo)C3H9P
  1957 TrimethylphosphineC3H9P
  1958 Protonated trimethylphosphineC3H10P
  1959 DiethylphosphineC4H11P
  1960 Phosphole (Geo)C5H5P


REF: M. W. Chase, C. A. Davies, J. R. Downey, D. R. Frurip, R. A. McDonald, A. N. Syverud, JANAF Thermochemical Tables, Third Edition, J. Phys. Chem. Ref. Data 14, Suppl. 1 (1985).
  
 PM7
Methinophosphide
 GR=JANAF86 <C-P> <H-C>
  P     0.00000000 +0    0.0000000 +0    0.0000000 +0     0     0     0
  C     1.54210000 +1    0.0000000 +0    0.0000000 +0     1     0     0
  H     1.06670000 +1  180.0000000 +1    0.0000000 +0     2     1     0