Reduction formula for point group D3
Characters for molecular motions
| Motion |
E |
2C3 (z) |
3C'2 |
| Cartesian 3N |
156 |
0 |
-2 |
| Translation (x,y,z) |
3 |
0 |
-1 |
| Rotation (Rx,Ry,Rz) |
3 |
0 |
-1 |
| Vibration |
150 |
0 |
0 |
Decomposition into Irreducible representations
| Motion |
A1 |
A2 |
E |
Total |
| Cartesian 3N |
25 |
27 |
52 |
104 |
| Translation (x,y,z) |
0 |
1 |
1 |
2 |
| Rotation (Rx,Ry,Rz) |
0 |
1 |
1 |
2 |
| Vibration |
25 |
25 |
50 |
100 |
Molecule Parameter
| Number of Atoms (N) |
52 |
| Number of internal coordinates |
150 |
| Number of independant internal coordinates |
25 |
| Number of vibrational modes |
100 |
Force field analysis
Allowed / forbidden vibronational transitions
| Operator |
A1 |
A2 |
E |
Total |
| Linear (IR) |
25 |
25 |
50 |
75 / 25 |
| Quadratic (Raman) |
25 |
25 |
50 |
75 / 25 |
| IR + Raman |
- |
- |
50 |
50 / 0 |
Characters of symmetric powers for vibration representation
| Force field |
Tensor
Order |
E |
2C3 (z) |
3C'2 |
| linear |
1 |
150 |
0 |
0 |
| quadratic |
2 |
11.325 |
0 |
75 |
| cubic |
3 |
573.800 |
50 |
0 |
| quartic |
4 |
21.947.850 |
0 |
2.850 |
| quintic |
5 |
675.993.780 |
0 |
0 |
| sextic |
6 |
17.463.172.650 |
1.275 |
73.150 |
Decomposition into Irreducible representations
Number of nonvanshing force constants
| Force field |
Tensor
Order |
A1 |
A2 |
E |
| linear |
1 |
25 |
25 |
50 |
| quadratic |
2 |
1.925 |
1.850 |
3.775 |
| cubic |
3 |
95.650 |
95.650 |
191.250 |
| quartic |
4 |
3.659.400 |
3.656.550 |
7.315.950 |
| quintic |
5 |
112.665.630 |
112.665.630 |
225.331.260 |
| sextic |
6 |
2.910.565.775 |
2.910.492.625 |
5.821.057.125 |
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