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Silica-bound imidazole as a heterogeneous axial ligand for Mn(salophen)Cl: Efficient, recoverable and recyclable catalyst for epoxidation of alkenes and hydroxylation of alkanes with sodium periodate

Paper ID Volume ID Publish Year Pages File Format Full-Text
44573 46042 2006 8 PDF Available
Title
Silica-bound imidazole as a heterogeneous axial ligand for Mn(salophen)Cl: Efficient, recoverable and recyclable catalyst for epoxidation of alkenes and hydroxylation of alkanes with sodium periodate
Abstract

Choloropropylated silica-gel reacts with imidazole to give imidazole modified silica, which can bound to manganese(III) salophen complex via ligand-to-metal coordination bond. Silica-bound imidazole (SiIm), is not only a heterogeneous axial base but also is a support for immobilization of Mn(III) salophen. The catalyst, Mn(salophen)Cl-SiIm, has been characterized by FT-IR, UV–vis spectroscopic techniques, SEM, thermal and elemental analysis. Mn(salophen)Cl-SiIm catalyze alkene epoxidation with sodium periodate as oxidant at room temperature. The effect of reaction parameters such as solvent and oxidant in the epoxidation of cis-cyclooctene were investigated. This catalytic system shows a good activity in the epoxidation of linear alkenes, which is higher than the homogeneous analogs, Mn(salophen). Alkylaromatics and cycloalkanes were oxidized efficiently to their corresponding alcohols and ketones in the presence of this catalyst. The obtained results showed that this catalyst is a robust and stable heterogeneous catalyst and can be recovered quantitatively by simple filtration and reused without loss of its acivity.

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Keywords
Silica; Manganese salophen; Periodate; Epoxidation; Hydroxylation
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Silica-bound imidazole as a heterogeneous axial ligand for Mn(salophen)Cl: Efficient, recoverable and recyclable catalyst for epoxidation of alkenes and hydroxylation of alkanes with sodium periodate
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 313, Issue 2, 4 October 2006, Pages 122–129
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us