Abstract
Frequency and form have been calculated for the normal modes of vinyl compounds of elements in group IV; intensity measurements have also been made on some Raman lines characteristic of these. The frequency change in the vinyl group in the series C, Si, Ge, Sn is shown to be due mainly to the induction from the central atom M; the fall in the Raman intensity of thev C=C line is due to participation of the qx coordinate (M-C bond) in this normal mode. The evidence for pπ-dπ conjugation is discussed; if present, it is very small and does not affect the vibrational spectra.
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Leites, L.A., Pavlova, I.D. & Egorov, Y.P. Theoretical analysis of vibrational spectra for vinyl derivatives of group IVb Elements and pπ-dπ, conjugation. Theor Exp Chem 1, 199–207 (1965). https://doi.org/10.1007/BF01134321
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DOI: https://doi.org/10.1007/BF01134321