Reduction formula for point group C2

Your representation

E C2
9 -1

can be reduced to

A B
4 5

Substraction of translational and rotational contributions results in

A B
2 1



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 3 3 2
quadratic 9 6 4
cubic 27 10 6
quartic 81 15 9
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 2 1
quadratic 4 2
cubic 6 4
quartic 9 6

Number of independant internal coordinates 2

Literature




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