Two Faces of the Bi-O Bond: Photochemically Thermally Induced Dehydrocoupling for Si-O Bond Formation

Overview

Journal Eur J Inorg Chem

Date 2022 Jul 25

PMID 35873275

Authors

Jacqueline Ramler

Johannes Schwarzmann

Andreas Stoy

Crispin Lichtenberg

Affiliations

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Abstract

The diorgano(bismuth)alcoholate [Bi((CHCH)S)OPh] () has been synthesized and fully characterized. Stoichiometric reactions, UV/Vis spectroscopy, and (TD-)DFT calculations suggest its susceptibility to homolytic and heterolytic Bi-O bond cleavage under given reaction conditions. Using the dehydrocoupling of silanes with either TEMPO or phenol as model reactions, the catalytic competency of has been investigated (TEMPO=(tetramethyl-piperidin-1-yl)-oxyl). Different reaction pathways can deliberately be addressed by applying photochemical or thermal reaction conditions and by choosing radical or closed-shell substrates (TEMPO vs. phenol). Applied analytical techniques include NMR, UV/Vis, and EPR spectroscopy, mass spectrometry, single-crystal X-ray diffraction analysis, and (TD)-DFT calculations.

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Two Faces of the Bi-O Bond: Photochemically Thermally Induced Dehydrocoupling for Si-O Bond Formation.

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