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Stable and Easy-to-handle Surrogate of Monosilane (SiH4)

Tri(cyclohexa-2,5-dien-1-yl)silane (1) is used as a surrogate of monosilane (SiH4). In the presence of catalytic amounts of B(C6F5)3, an allylic hydride of cyclohexa-2,5-dienyl groups of 1 is transferred to form an Si–H bond-substituted silane 2 with the release of benzene. Sequential B(C6F5)3-catalyzed further replacement of two remaining cyclohexa-2,5-dienyl moieties by Si–H bonds proceeds to afford monosilane. The given monosilane can be directly applied to the transfer hydrosilylation of alkenes.


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