Reduction formula for point group C2

Your representation

E C2
12 -2

can be reduced to

A B
5 7

Substraction of translational and rotational contributions results in

A B
3 3



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 6 6 3
quadratic 36 21 12
cubic 216 56 28
quartic 1296 126 66
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 3 3
quadratic 12 9
cubic 28 28
quartic 66 60

Number of independant internal coordinates 3

Literature




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