P. Gaspar, A. Beatty, Tongqian Chen
Aug 19, 1999
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Influential Citations
34
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Journal
Organometallics
Abstract
Tris(triisopropylsilyl)silane (iPr3Si)3SiH has been synthesized and studied by X-ray and neutron diffraction. It possesses an unusual structure in which the four silicon atoms are nearly coplanar, ∠Si−Si−Si = 118.41(5)°. The Si−H distance is found to have a normal value of 1.506(2) A. Thermal and room-temperature photochemical decomposition of (iPr3Si)3SiH leads to the elimination of iPr3SiH and the generation of bis(triisopropylsilyl)silylene, [(iPr3Si)2Si:]. Reactions of (iPr3Si)2Si: include precedented insertions into H−Si bonds and addition to the π-bonds of olefins, alkynes, and dienes. Despite theoretical predictions of a triplet ground state for [(iPr3Si)2Si:], stereospecific addition to cis- and trans-2-butene was observed.