Reduction formula for point group C2

Your representation

E C2
15 -3

can be reduced to

A B
6 9

Substraction of translational and rotational contributions results in

A B
4 5



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 9 9 4
quadratic 81 45 25
cubic 729 165 80
quartic 6561 495 255
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 4 5
quadratic 25 20
cubic 80 85
quartic 255 240

Number of independant internal coordinates 4

Literature




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