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Issue 75, 2016
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Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis

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Abstract

A method for the synthesis of a homogeneous cationic tungsten(VI)pentamethyl complex [(WMe5)+(C6F5)3BMe] from neutral tungstenhexamethyl (WMe6) and a silica supported cationic tungstentetramethyl complex [([triple bond, length as m-dash]Si–O–)WMe4+ (C6F5)3BMe] from a neutral silica supported tungstenpentamethyl complex [([triple bond, length as m-dash]Si–O–)WMe5] is described. In both cases a direct demethylation using the B(C6F5)3 reagent was used. The aforesaid complexes were characterized by liquid or solid state NMR spectroscopy. Interestingly, the homogeneous cationic complex [(WMe5)+(C6F5)3BMe] shows moderate activity whereas the supported cationic complex [([triple bond, length as m-dash]Si–O–)WMe4+(C6F5)3BMe] exhibits good activity in olefin metathesis reactions.

Graphical abstract: Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(vi) methyl complex: application in olefin metathesis

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Supplementary files

Article information


Submitted
27 Jun 2016
Accepted
19 Aug 2016
First published
19 Aug 2016

Chem. Commun., 2016,52, 11270-11273
Article type
Communication

Synthesis and characterization of a homogeneous and silica supported homoleptic cationic tungsten(VI) methyl complex: application in olefin metathesis

R. Dey, M. K. Samantaray, A. Poater, A. Hamieh, S. Kavitake, E. Abou-Hamad, E. Callens, A. Emwas, L. Cavallo and J. Basset, Chem. Commun., 2016, 52, 11270
DOI: 10.1039/C6CC05352A

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