Reduction formula for point group Cs
Characters for molecular motions
| Motion |
E |
 h |
| Cartesian 3N |
30 |
4 |
| Translation (x,y,z) |
3 |
1 |
| Rotation (Rx,Ry,Rz) |
3 |
-1 |
| Vibration |
24 |
4 |
Decomposition into Irreducible representations
| Motion |
A' |
A'' |
Total |
| Cartesian 3N |
17 |
13 |
30 |
| Translation (x,y,z) |
2 |
1 |
3 |
| Rotation (Rx,Ry,Rz) |
1 |
2 |
3 |
| Vibration |
14 |
10 |
24 |
Molecule Parameter
| Number of Atoms (N) |
10 |
| Number of internal coordinates |
24 |
| Number of independant internal coordinates |
14 |
| Number of vibrational modes |
24 |
Force field analysis
Allowed / forbidden vibronational transitions
| Operator |
A' |
A'' |
Total |
| Linear (IR) |
14 |
10 |
24 / 0 |
| Quadratic (Raman) |
14 |
10 |
24 / 0 |
| IR + Raman |
14 |
10 |
24 / 0 |
Characters of symmetric powers for vibration representation
| Force field |
Tensor
Order |
E |
h |
| linear |
1 |
24 |
4 |
| quadratic |
2 |
300 |
20 |
| cubic |
3 |
2.600 |
60 |
| quartic |
4 |
17.550 |
190 |
| quintic |
5 |
98.280 |
476 |
| sextic |
6 |
475.020 |
1.204 |
Decomposition into Irreducible representations
Number of nonvanshing force constants
| Force field |
Tensor
Order |
A' |
A'' |
| linear |
1 |
14 |
10 |
| quadratic |
2 |
160 |
140 |
| cubic |
3 |
1.330 |
1.270 |
| quartic |
4 |
8.870 |
8.680 |
| quintic |
5 |
49.378 |
48.902 |
| sextic |
6 |
238.112 |
236.908 |
Literature
- J.K.G. Watson, J. Mol. Spec. 41 229 (1972)
The Numbers of Structural Parameters and Potential Constants of Molecules
- X.F. Zhou, P. Pulay. J. Comp. Chem. 10 No. 7, 935-938 (1989)
Characters for Symmetric and Antisymmetric Higher Powers of Representations:
Application to the Number of Anharmonic Force Constants in Symmetrical Molecules
Last update November, 13th 2023 by A. Gelessus, Impressum, Datenschutzerklärung/DataPrivacyStatement