Reduction formula for point group Ci

Your representation

E i
72 0

can be reduced to

Ag Au
36 36

Substraction of translational and rotational contributions results in

Ag Au
33 33



Force field analysis

Infrared and Raman activities (harmonic approximation)
Method Ag Au
Infrared - +
Raman + -

Number of force field parameters
Force field No. 1 No. 2 No. 3
linear 66 66 33
quadratic 4356 2211 1122
cubic 287496 50116 25058
quartic 18974736 864501 432531
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 Ag Au
linear 33 33
quadratic 1122 1089
cubic 25058 25058
quartic 432531 431970

Number of independant internal coordinates 33

Literature




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