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A study of the B2 excited state geometries of the metal-metal quadruply bonded compounds Mo2X4(PMe3)4 (X = Cl, Br or I) |
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| Authors: | Christian Svendsen Mads J Nielsen O Sonnich Mortensen Suzanne J R Allers and Robin J H Clark |
| Institution: | a Fysisk Institut, Odense Universitet, DK-5230, Odense M, Denmark b Christopher Ingold Laboratories, University College London, 20 Cordon Street, London WC1H 0AJ, UK |
| Abstract: | The excited state geometries of the metal-metal quadruply bonded compounds Mo2X4(PMe3)4 (X = Cl, Br or I) have been studied by means of resonance Raman and absorption spectroscopy. A fit of the parameters of a simple theoretical model to the experimental data indicates that the metal-metal bond increases some 10 pm on excitation to the 1B2 (δδ*) state, whereas other geometric changes are small. Furthermore, the phenomenological lifetime factor of the excited state, Γ, is found to be dependent on the vibrational quantum number, ν, of this state. |
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