Reduction formula for point group C2

Your representation

E C2
60 0

can be reduced to

A B
30 30

Substraction of translational and rotational contributions results in

A B
28 26



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 54 54 28
quadratic 2916 1485 757
cubic 157464 27720 13888
quartic 8503056 395010 197722
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 28 26
quadratic 757 728
cubic 13888 13832
quartic 197722 197288

Number of independant internal coordinates 28

Literature




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