VIBRATIONAL SPECTRA AND NORMAL-COORDINATE ANALYSES OF SILACYCLOBUTANES
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abstract
The complete vibrational spectra of silacyclobutane, (CH2)3SiH2, and of three of its derivatives, (CH2)3SiX3 where X = D, F, Cl, have been recorded and an assignment for each molecule is proposed. A normal-coordinate calculation for each of these molecules was carried out to test the assignment and to demonstrate coupling between various vibrational modes. Considerable mixing of the modes was found. An analysis of the spectra shows that all four of these four-membered ring compounds are non-planar and have C3 symmetry. 1970.