Catalytic epoxidation of cyclohexene using Molybdenum complexes

Three oxomolybdenum complexes, MoO2(acac)2, MoO2(oxine)2 and MoO2(PDTC)2, were prepared, characterised and essayed as catalysts for the epoxidation of cyclohexene in a batch reactor. The reaction was performed at 60 and 70°C using tert-butylhydroperoxide as oxidant agent and toluene and dichloroetha...

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Autores principales:	Gnecco,J. A., Borda,G., Reyes,P.
Lenguaje:	English
Publicado:	Sociedad Chilena de Química 2004
Materias:	oxomolybdenum complexes cyclohexene epoxidation kinetic study
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000200014
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spelling	oai:scielo:S0717-970720040002000142005-09-21Catalytic epoxidation of cyclohexene using Molybdenum complexesGnecco,J. A.Borda,G.Reyes,P. oxomolybdenum complexes cyclohexene epoxidation kinetic study Three oxomolybdenum complexes, MoO2(acac)2, MoO2(oxine)2 and MoO2(PDTC)2, were prepared, characterised and essayed as catalysts for the epoxidation of cyclohexene in a batch reactor. The reaction was performed at 60 and 70°C using tert-butylhydroperoxide as oxidant agent and toluene and dichloroethane as solvents. All the complexes exhibit high selectivity to the corresponding epoxide under the studied conditions, being the MoO2(acac)2 the one that exhibits the highest specific rate constant. An enhancement in the specific rate constant is observed at higher reaction temperatures and by using dichloroethane as solvent. A detailed kinetic study showed that the cyclohexene epoxidation is a global second order reaction: order one with respect to cyclohexene and also order one dependence in tert-butylhydroperoxide. A reaction mechanism that explains the experimental results is proposedinfo:eu-repo/semantics/openAccessSociedad Chilena de QuímicaJournal of the Chilean Chemical Society v.49 n.2 20042004-06-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000200014en10.4067/S0717-97072004000200014
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	oxomolybdenum complexes cyclohexene epoxidation kinetic study
spellingShingle	oxomolybdenum complexes cyclohexene epoxidation kinetic study Gnecco,J. A. Borda,G. Reyes,P. Catalytic epoxidation of cyclohexene using Molybdenum complexes
description	Three oxomolybdenum complexes, MoO2(acac)2, MoO2(oxine)2 and MoO2(PDTC)2, were prepared, characterised and essayed as catalysts for the epoxidation of cyclohexene in a batch reactor. The reaction was performed at 60 and 70°C using tert-butylhydroperoxide as oxidant agent and toluene and dichloroethane as solvents. All the complexes exhibit high selectivity to the corresponding epoxide under the studied conditions, being the MoO2(acac)2 the one that exhibits the highest specific rate constant. An enhancement in the specific rate constant is observed at higher reaction temperatures and by using dichloroethane as solvent. A detailed kinetic study showed that the cyclohexene epoxidation is a global second order reaction: order one with respect to cyclohexene and also order one dependence in tert-butylhydroperoxide. A reaction mechanism that explains the experimental results is proposed
author	Gnecco,J. A. Borda,G. Reyes,P.
author_facet	Gnecco,J. A. Borda,G. Reyes,P.
author_sort	Gnecco,J. A.
title	Catalytic epoxidation of cyclohexene using Molybdenum complexes
title_short	Catalytic epoxidation of cyclohexene using Molybdenum complexes
title_full	Catalytic epoxidation of cyclohexene using Molybdenum complexes
title_fullStr	Catalytic epoxidation of cyclohexene using Molybdenum complexes
title_full_unstemmed	Catalytic epoxidation of cyclohexene using Molybdenum complexes
title_sort	catalytic epoxidation of cyclohexene using molybdenum complexes
publisher	Sociedad Chilena de Química
publishDate	2004
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-97072004000200014
work_keys_str_mv	AT gneccoja catalyticepoxidationofcyclohexeneusingmolybdenumcomplexes AT bordag catalyticepoxidationofcyclohexeneusingmolybdenumcomplexes AT reyesp catalyticepoxidationofcyclohexeneusingmolybdenumcomplexes
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Catalytic epoxidation of cyclohexene using Molybdenum complexes

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