Reduction formula for point group C2

Your representation

E C2
54 0

can be reduced to

A B
27 27

Substraction of translational and rotational contributions results in

A B
25 23



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 48 48 25
quadratic 2304 1176 601
cubic 110592 19600 9825
quartic 5308416 249900 125125
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 25 23
quadratic 601 575
cubic 9825 9775
quartic 125125 124775

Number of independant internal coordinates 25

Literature




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