Epoxidation of Alkenes with Molecular Oxygen Catalyzed by Immobilized Co(acac)2and Co(bpy)2Cl2Complexes within Nanoreactors of Al-MCM-41 release_fcnsn2sw5rcd3bara6en7q4zhe

by F. Farzaneh, M. Jalalian, L. Tayebi

Published in E-Journal of Chemistry by Hindawi Limited.

2012   p2205-2212

Abstract

Cobalt complexes with different ligands such as bipyridine, and acetylacetonate were immobilized within nanoreactors of Al-MCM-41, designated as Co(acac)<jats:sub>2</jats:sub>/Al-MCM-41 and Co(bipy)<jats:sub>2</jats:sub><jats:sup>2+</jats:sup>/Al-MCM41. The immobilized complexes were characterized by XRD, N<jats:sub>2</jats:sub>-adsorption desorption, FT-IR and UV-Vis techniques. It was found that Co(bipy)<jats:sub>2</jats:sub><jats:sup>2+</jats:sup>/Al-MCM41 and Co(acac)<jats:sub>2</jats:sub>/Al-MCM-41 successfully catalyze the oxidation of norbornene, styrene, cis-stilbene, trans-stilbene, and cyclohexene with 68% to 100% conversion and 41% to 90% selectivity toward the corresponding epoxides. No desorption was observed during the course of reactions.
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