Reduction formula for point group C2

Your representation

E C2
57 -3

can be reduced to

A B
27 30

Substraction of translational and rotational contributions results in

A B
25 26



Force field analysis

Infrared and Raman activities (harmonic approximation)
Method A B
Infrared + +
Raman + +

Number of force field parameters
Force field No. 1 No. 2 No. 3
linear 51 51 25
quadratic 2601 1326 676
cubic 132651 23426 11700
quartic 6765201 316251 158301
No. 1 : Total number of force constants .
No. 2 : Total number of force constants k.
No. 3 : Total number of nonvanishing force constants k.

Symmetry properties of force field parameters
Force field A B
linear 25 26
quadratic 676 650
cubic 11700 11726
quartic 158301 157950

Number of independant internal coordinates 25

Literature




Character tables for chemically important point groups Character table for point group C2 Jacobs University Bremen