Synthesis of bis-quaternary ammonium peroxotungstates (peroxomolybdates) and their catalytic activity in oxidation of alcohols by aqueous H2O2 |
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Authors: | Xianying Shi Junfa Wei |
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Institution: | (1) School of Chemistry and Materials Science, Shaanxi Normal University, Xi’an, 710062, China |
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Abstract: | Three kinds of bis-quaternary ammonium salts of peroxotungstate and peroxomolybdate, such as PhCH2N-(CH2)6NCH2PhW(O2)4] · 2H2O, PhCH2N(CH2)6NCH2PhW-O(O2)2(C2O4)] and PhCH2N(CH2)6NCH2PhMoO(O2)2(C2O4)], have been synthesized and characterized. Their catalytic activity in the oxidation of cyclohexanol and benzyl alcohol
was investigated with only aqueous 30% hydrogen peroxide. The results show that the bis-quaternary ammonium peroxotungstates
are excellent catalysts in the oxidation of benzyl alcohol and cyclohexanol under moderate conditions. However, the catalytic
ability of bis-quaternary ammonium peroxomolybadates is relatively poor. The yields of benzyl acid, benzaldehyde, and cyclohexanone
reached up to 93.0%, 93.6%, and 91.7%, respectively.
Translated from Chinese Journal of Applied Chemistry, 2005, 22(10) (in Chinese) |
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Keywords: | peroxotungstate peroxomolybadate bisquaternary phosphonium hydrogen peroxide |
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