Reduction formula for point group C2

Your representation

E C2
30 -2

can be reduced to

A B
14 16

Substraction of translational and rotational contributions results in

A B
12 12



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 24 24 12
quadratic 576 300 156
cubic 13824 2600 1300
quartic 331776 17550 8814
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 12 12
quadratic 156 144
cubic 1300 1300
quartic 8814 8736

Number of independant internal coordinates 12

Literature




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