Jahn-Teller methane radical cation

Figure 6.9. Top to bottom Two possible Jahn-Teller distorted geometries for the methane radical cation and calculated geometry for its energy minimum schematic representation of the SOMO for ethane radical cation SOMOs of three different propane radical cations observed by ESR the SOMO of butane radical cation and SOMOs for two conformers of pentane radical cation.

The methane radical cation, CH4, is known to Jahn-Teller distort from the symmetric tetrahedral neutral ground state structure to a conformation of C2, symmetry, with two elongated and two shorter CH bonds (1.18 and... 

Figure 2. Possible Jahn-Teller distorted geometries for methane radical cation.

The second topic is concerned with Jahn-Teller (J-T) distortion of organic radical cations whose mother molecules have either 7d or Csv structure with a doubly degenerate HOMO. A series of D( H)-labelled methane radical cations (CH4, ... 

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