Reduction formula for point group C2

Your representation

E C2
21 -3

can be reduced to

A B
9 12

Substraction of translational and rotational contributions results in

A B
7 8



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 15 15 7
quadratic 225 120 64
cubic 3375 680 336
quartic 50625 3060 1548
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 7 8
quadratic 64 56
cubic 336 344
quartic 1548 1512

Number of independant internal coordinates 7

Literature




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