Reduction formula for point group C2

Your representation

E C2
72 0

can be reduced to

A B
36 36

Substraction of translational and rotational contributions results in

A B
34 32



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 66 66 34
quadratic 4356 2211 1123
cubic 287496 50116 25092
quartic 18974736 864501 432565
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 34 32
quadratic 1123 1088
cubic 25092 25024
quartic 432565 431936

Number of independant internal coordinates 34

Literature




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