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

Dey, Raju
Samantaray, Manoja K.
Hamieh, Ali
Kavitake, Santosh
Abou-Hamad, Edy
Callens, Emmanuel
Emwas, Abdul Hamid
Cavallo, Luigi
Basset, Jean Marie
Full Text
Synthesis-and-characterization.pdf embargoed access
Request a copy
When filling the form you are requesting a copy of the article, that is deposited in the institutional repository (DUGiDocs), at the autor or main autor of the article. It will be the same author who decides to give a copy of the document to the person who requests it, if it considers it appropriate. In any case, the UdG Library doesn’t take part in this process because it is not authorized to provide restricted articles.
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 ​
​Tots els drets reservats