Electronic and vibrational resonance Raman spectra of octamethyluranocene |
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Authors: | Satoshi Yamaguchi Thomas G Spiro |
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Institution: | Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA |
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Abstract: | The Raman spectrum of bis(tetramethylcyclo-octatetraene)uranium (U(TMCOT)2), excited in resonance with its visible charge-transfer transitions shows an anomalously polarized electronic band at 473 cm?1, twice as broad as the analogous band of uranocene, at 466 cm?1. The broadening is attributed to crystal-field splitting associated with the lowered symmetry introduced by the methyl group, and/or a distribution of rotamer populations. Totally symmetric vibrational modes are observed at 879, 750, 580, 513 and 95 cm?1; possible assignments are discussed. |
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