Affiliation:
1. Fachbereich Chemie der Universität Oldenburg, Carl-von-Ossietzky-Straße 9-11, D-2900 Oldenburg
Abstract
The reactions of alkali metal 2,4,6-tri-tert-butylphenoxides with trichlorosilane and silicon tetrachloride give the bis(2,4,6-tri-tert-butylphenoxy)silanes 3 and 4. Treatment of 3 and 4 with methanol in the presence of ethyldiisopropylamine yields the methoxy derivatives (ArO)2Si(OMe)Cl (5) and (ArO)2Si(OMe)H (6). Tris(2,4,6-triisopropylphenylthio)silane (9) and tris(2,4,6-tri-tert-butylphenylthio)silane (10) are formed by a similar route. The X-ray structure analysis of the extremely crowded compound 10 reveals no significant deviations from the properties of sterically less hindered arylthiosilanes. The planes of the phenyl rings are rotated by ca. 60° against one another resulting in an efficient shielding of the Si- H bond. Efforts to generate silicenium ions from 5, 6, 9, and 10 remained unsuccessful as yet
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6 articles.
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