Ar-MATRIX STABILIZATION AND IR SPECTRA OF 1,1-DIMETHYL-1-SILAETHYLENE AND ITS DEUTEROMETHYL DERIVATIVE

Article abstract of DOI:10.1016/S0022-328X(00)92571-3

The IR spectra of the unstable silaethylenes (CH3)2Si=CH2 and (CD3)2Si=CH2 formed in the gas phase from monosilacyclobutanes have been recorded in an argon matrix at 10 deg K.An assignment of the spectral bands to the unstable species is established by experiments with pyrolysis at higher temperatures and pressures or with a controlled warm-up of the matrix, and also by recording spectra of the same species produced from various precursors.The assignment of the frequency 1003.5 cm^-1 to the stretching vibration of the Si=C bond in (CH3)2Si=CH2 is in agreement with force field calculations.