Reduction formula for point group C2

Your representation

E C2
42 -2

can be reduced to

A B
20 22

Substraction of translational and rotational contributions results in

A B
18 18



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 36 36 18
quadratic 1296 666 342
cubic 46656 8436 4218
quartic 1679616 82251 41211
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 18 18
quadratic 342 324
cubic 4218 4218
quartic 41211 41040

Number of independant internal coordinates 18

Literature




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