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Cartesian Dynamics of Simple Molecules VIII planar quadratomics (D3h symmetry) |
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| Authors: | S X Weng O S Binbrek A Anderson |
| Institution: | 1. Department of Physics , University of Waterloo , Waterloo, Ontario, N2L 3G1, Canada;2. Department of Chemistry , University of Guelph , Guelph, Ontario, N1G 2W1, Canada;3. Department of Physics , King Fahd University of Petroleum and Minerals , Dhahran, Saudi Arabia;4. Department of Physics , University of Waterloo , Waterloo, Ontario, N2L 3G1, Canada |
| Abstract: | The vibrations of planar A3B type molecules with D3h symmetry are analysed, by treating these molecules as a special case of A2BC types with C2v symmetry. Analytical expressions for the four normal mode frequencies are derived in terms of four force constants, and optimized values of the latter for the boron trihalides and sulphur trioxide are obtained and briefly discussed. Frequencies of various isotopic species are also calculated. |
| Keywords: | Molecular vibrations infrared spectroscopy Raman spectroscopy lattice dynamics |