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Issue 47, 2018
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Selective hydrosiloxane synthesis via dehydrogenative coupling of silanols with hydrosilanes catalysed by Fe complexes bearing a tetradentate PNNP ligand

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Abstract

A well-defined iron complex system was established using PNNP-R (R = Ph and Cy) as a strong σ-donating ligand with a rigid meridional tetradentate structure. Reactive Fe(0) complexes [{Fe(PNNP-R)}2(μ-N2)] were synthesized by a reaction of the corresponding iron dihalide with NaBEt3H and structurally characterized. The reaction proceeded via the iron dihydride intermediate [Fe(H)2(PNNP-R)], which underwent H2 reductive elimination, supporting the hemilabile behavior of PNNP-R. [{Fe(PNNP-R)}2(μ-N2)] catalyzed the dehydrogenative coupling of silanols with silanes to selectively form various hydrosiloxanes, which are important building blocks for the synthesis of a range of siloxane compounds. This system exhibited higher catalytic efficiency than the previously reported precious-metal-catalyzed systems.

Graphical abstract: Selective hydrosiloxane synthesis via dehydrogenative coupling of silanols with hydrosilanes catalysed by Fe complexes bearing a tetradentate PNNP ligand

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Article information


Submitted
17 Oct 2018
Accepted
09 Nov 2018
First published
12 Nov 2018

Dalton Trans., 2018,47, 17004-17010
Article type
Paper

Selective hydrosiloxane synthesis via dehydrogenative coupling of silanols with hydrosilanes catalysed by Fe complexes bearing a tetradentate PNNP ligand

T. Takeshita, K. Sato and Y. Nakajima, Dalton Trans., 2018, 47, 17004
DOI: 10.1039/C8DT04168G

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