Metal-free Catalytic Hydrogenolysis of Silyl Triflates and Halides into Hydrosilanes

18 March 2022, Version 2
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

The metal-free catalytic hydrogenolysis of silyl triflates and halides (I, Br) to hydrosilanes is unlocked by using arylborane Lewis acids as catalysts. In the presence of a nitrogen base, the catalyst acts as a Frustrated Lewis Pair (FLP) able to split H2 and generate a boron hydride intermediate prone to reduce (pseudo)halosilanes. This metal-free organocatalytic system is competitive with metal-based catalysts and enables the formation of a variety of hydrosilanes at r.t. in high yields (>85 %) under a low pressure of H2 (≤ 10 bar).

Keywords

Hydrosilane Sythesis
Metal-free
hydrogenolysis
Frustrated Lewis Pairs
H2 activation
Borohydrides

Supplementary materials

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Experimental Details
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Experimental details
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DFT Coordinates
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Coordinates of computed structures
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cif file
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X Ray structure
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