Silica immobilized salicylaldimine Cu(II) and Co(II) complexes as catalysts in cyclohexene oxidation: A comparative study of support effects

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• 作者：N ; i Malumbazo ; Selwyn F. Mapolie
• 关键词：Immobilized catalysts ; Salicylaldimine complexes ; Cyclohexene oxidation
• 刊名：Journal of Molecular Catalysis A: Chemical
• 出版年：2009
• 出版时间：1 October 2009
• 年：2009
• 卷：312
• 期：1-2
• 页码：70-77
• 全文大小：1223 K

文摘

Unsubstituted and tertiary-butyl substituted salicylaldimine complexes of Cu(II) and Co(II) immobilized on silica supports (MCM-41, SBA-15 and Davisil 710) were tested as catalysts for cyclohexene oxidation using hydrogen peroxide as an oxidant under an oxygen atmosphere. The effect of the nature of the salicylaldimine ligand and the type of support were investigated. Allylic species were isolated as the major products with cyclohexene–epoxide produced as a by-product in only some instances. Product selectivity was found to be greatly influenced by the nature of the support material.