Abstract

Calculations based on the assumption that the silicon-phenyl group is a simple harmonic oscillator and a study of the infrared spectra of tetraphenylmethane, tetraphenylsilane, tetraphenylgermane, tetraphenyltin, and tetraphenyllead indicate that the asymmetrical silicon-phenyl stretching vibration should occur near 515 cm⁻¹. A strong infrared absorption band near 515 cm⁻¹ has been observed in the infrared spectra of twenty-two phenylsilanes of the types (C₆H₅)₄Si, (C₆H₅)₃SiX, (C₆H₅)₂SiX₂, (C₆H₅)₂SiX<sub/>Y, and C₆H₅SiX₂Y and has been assigned to the silicon-phenyl asymmetrical stretching vibration.

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