Catalytic exploration of NHC-Ag(i)HMDS complexes for the hydroboration and hydrosilylation of carbonyl compounds

Claudia P. Giarrusso, Daniel V. Zeil, Victoria L. Blair

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4 Citations (Scopus)

Abstract

The synthesis and full characterisation of two silver(i) amido complexes, stabilised by ancillary N-heterocyclic carbene (NHC) ligands is presented. The light stable complexes [Ag(IDipp)HMDS] 3 and [Ag(IAd)HMDS] 4 were explored as suitable pre-catalysts in the hydroboration and hydrosilylation of a range of carbonyl substrates, with complex 3 out-performing 4 and our previous phosphine-stabilised lead catalyst [Ag(PCy3)HMDS] 5. This study highlights that changing the stabilising Lewis donor in the silver(i)amide system has an influence on catalytic efficiency. Finally, to shed light on the catalytic differences of pre-catalysts 3-5, we used a suite of programs to examine the influence of steric bulk on the Lewis donor ligand including percent buried volume (%VBur), Solid-G and AtomAccess which revealed the most sterically protected Ag(i) metal centre correlated to the most effective pre-catalyst 3.

Original languageEnglish
Pages (from-to)7828-7835
Number of pages8
JournalDalton Transactions
Volume52
Issue number23
DOIs
Publication statusPublished - 21 Jun 2023

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