Journal of Physical Chemistry p. 5110 - 5115 (1982)
Update date:2022-08-16
Topics:
Kalasinsky, V. F.
Pechsiri, S.
Some thermal reactions involving 1,1-dimethyl-1-silacyclobutane have been studied by using conventional vacuum pyrolysis techniques and by using infrared laser radiation.The pyrolysis of 1,1-dimethyl-1-silacyclobutane is known to produce 1,1,3,3-tetramethyl-1,3-disilacyclobutane in nearly quantitative yields at 490 deg C.It has been found that 1,1,3,3-tetramethyl-1,3-disilacyclobutane can also be produced from 1,1-dimethyl-1-silacyclobutane by the adsorption of infrared laser radiation in the region between 1000 and 900 cm-1.The infrared and Raman spectra of the product have been recorded, and, on the basis of a complete vibrational assigment, the structure of 1,1,3,3-tetramethyl-1,3-disilacyclobutane appears to be one in which the ring assumes a planar configuration.Both 1,1-dimethyl-1-silacyclobutane and 1,1,3,3-tetramethyl-1,3-disilacyclobutane react with hydrogen chloride to produce trimethylchlorosilane.The mechanism of these reactions and the effects of varying reaction conditions are discussed.
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