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An Air‐Stable Heterobimetallic Si 2 M 2 Tetrahedral Cluster
Author(s) -
Dübek Gizem,
Hanusch Franziska,
Munz Dominik,
Inoue Shigeyoshi
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201916116
Subject(s) - chemistry , lewis acids and bases , steric effects , carbene , cluster (spacecraft) , ring (chemistry) , metal , crystallography , tetrahedron , silylation , tetrahedral molecular geometry , stereochemistry , medicinal chemistry , crystal structure , catalysis , organic chemistry , computer science , programming language
Air‐ and moisture‐stable heterobimetallic tetrahedral clusters [Cp(CO) 2 MSiR] 2 (M=Mo or W; R=Si t Bu 3 ) were isolated from the reaction of N‐heterocyclic carbene (NHC) stabilized silyl(silylidene) metal complexes Cp(CO) 2 M=Si(Si t Bu 3 )NHC with a mild Lewis acid (BPh 3 ). Alternatively, treatment of the NHC‐stabilized silylidene complex Cp(CO) 2 W=Si(Si t Bu 3 )NHC with stronger Lewis acids such as AlCl 3 or B(C 6 F 5 ) 3 resulted in the reversible coordination of the Lewis acid to one of the carbonyl ligands. Computational investigations revealed that the dimerization of the intermediate metal silylidyne (M≡Si) complex to a tetrahedral cluster instead of a planar four‐membered ring is due to steric bulk.