Reduction formula for point group C2v
Your representation
E |
C2 (z) |
v(xz) |
v(yz) |
6 |
2 |
4 |
0 |
can be reduced to
Force field analysis
Infrared and Raman activities (harmonic approximation)
Method |
A1 |
A2 |
B1 |
B2 |
Infrared |
+ |
- |
+ |
+ |
Raman |
+ |
+ |
+ |
+ |
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 |
A1 |
A2 |
B1 |
B2 |
linear |
3 |
1 |
2 |
0 |
quadratic |
10 |
3 |
6 |
2 |
cubic |
22 |
10 |
18 |
6 |
quartic |
48 |
22 |
38 |
18 |
Number of independant internal coordinates |
3 |
Literature
- J.K.G. Watson, J. Mol. Spec. 41 229 (1972)
The Numbers of Structural Parameters and Potential Constants of Molecules