Open AccessPerfluorinated quaternary ammonium salts of polyoxometalate anions: Fluorous biphasic oxidation catalysis with and without fluorous solvents
Author(s) -
Galia Maayan,
Richard H. Fish,
Ronny Neumann
Publication year - 2003
Language(s) - English
Resource type - Reports
DOI - 10.2172/842880
Subject(s) - polyoxometalate , chemistry , catalysis , hydrogen peroxide , solvent , ammonium , inorganic chemistry , aqueous solution , substrate (aquarium) , selectivity , alkene , alcohol oxidation , organic chemistry , geology , oceanography
Perfluorinated quaternary ammonium cations, [CF{sub 3}(CF{sub 2}){sub 7}(CH{sub 2}){sub 3}]{sub 3}CH{sub 3}N{sup +} (RFN{sup +}), were synthesized and used as counter cations for the [WZnM{sub 2}(H{sub 2}O){sub 2}(ZnW{sub 9}O{sub 34}){sub 2}]{sup 12-} (M = Mn(II), Zn(II)), polyoxometalate. The (RFN{sup +}){sub 12}[WZnM{sub 2}(H{sub 2}O){sub 2}(ZnW9O{sub 34}){sub 2}] compounds were fluorous biphasic catalysts for alcohol and alkenol oxidation, and alkene epoxidation with aqueous hydrogen peroxide. Reaction protocols with or without a fluorous solvent were tested. The catalytic activity and selectivity was affected both by the hydrophobicity of the solvent and the substrate