ChemInform Abstract: Synthetic Pathways to Disilylmethane, H3SiCH2SiH3, and Methyldisilane CH3SiH2SiH3.

Abstract

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Müller–Rochow Reloaded: Single-Step Synthesis of Bifunctional Monosilanes

“…Specifically, hydrolysis of Me 2 SiCl 2 and the subsequent condensation of Me 2 Si­(OH) 2 yield siloxanes that are further processed to a wide range of polydimethylsiloxanes. , While methylchlorosilanes are produced in excellent yields, the formation of bifunctional monosilanes carrying chlorine and hydrogen at the same silicon center is critically disfavored in the DP, for example, technically most valuable Me 2 SiHCl is formed in less than 0.5% . These compounds are, however, important building blocks: the Si–Cl functionality provides easy access to the siloxane Si–O–Si bonding motif, − while the Si–H functionality is versatile for hydrosilylation. − Despite substantial research efforts, the economic synthesis of bifunctional silanes at larger scales still represents a fundamental challenge. ,,− Conceivable synthetic routes include both the selective hydrogenation of chlorosilanes and the chlorination of hydridosilanes, but the existing strategies suffer substantial drawbacks, severely limiting the technical applicability. − ,− Promising improvements for the selective chlorination of di- and trihydridosilanes with HCl in the presence of catalytic amounts of Lewis acids as well as Lewis bases have been reported only recently …”