Experimental Evidence for a Dual Site Mechanism in Sn-Beta and Sn-MCM-41 Catalysts for the Baeyer-Villiger Oxidation

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Title:Experimental Evidence for a Dual Site Mechanism in Sn-Beta and Sn-MCM-41 Catalysts for the Baeyer-Villiger Oxidation
Creators:
Corma, Avelino
Renz, Michael
Journal or Publication Title:
Collection of Czechoslovak Chemical Communications, 70, 10, pp. 1727-1736
Uncontrolled Keywords:Knoevenagel-type condensation, Sn-Beta, Heterogeneous catalysis, MAS NMR spectroscopy, Zeolites, Sn-MCM-41, Malononitrile, Ketones

Abstract

It is postulated that the catalytic active centre in Sn-Beta and Sn-MCM-41 zeolites for Baeyer-Villiger oxidations involves not only the framework Sn sites but also an associated "basic" oxygen that stabilises the reaction transition state through hydrogen bonding. The presence of these "basic" sites has been studied by cross-polarization MAS NMR H → Sn, and by carrying out the condensation of ketones with malononitrile. The reaction proceeds highly selectively and the reactivity of the substrates corresponds to that of the ketones in the Baeyer-Villiger oxidation with hydrogen peroxide, catalysed with tin-containing molecular sieves. <p>

Title:Experimental Evidence for a Dual Site Mechanism in Sn-Beta and Sn-MCM-41 Catalysts for the Baeyer-Villiger Oxidation
Creators:
Corma, Avelino
Renz, Michael
Uncontrolled Keywords:Knoevenagel-type condensation, Sn-Beta, Heterogeneous catalysis, MAS NMR spectroscopy, Zeolites, Sn-MCM-41, Malononitrile, Ketones
Divisions:Life and Chemical Sciences > Institute of Organic Chemistry and Biochemistry > Collection of Czechoslovak Chemical Communications
Journal or Publication Title:Collection of Czechoslovak Chemical Communications
Volume:70
Number:10
Page Range:pp. 1727-1736
ISSN:0010-0765
E-ISSN:1212-6950
Publisher:Institute of Organic Chemistry and Biochemistry
Related URLs:
URLURL Type
http://dx.doi.org/10.1135/cccc20051727UNSPECIFIED
ID Code:2435
Item Type:Article
Deposited On:06 Feb 2009 17:18
Last Modified:06 Feb 2009 16:18

Citation

Corma, Avelino; Renz, Michael (2005) Experimental Evidence for a Dual Site Mechanism in Sn-Beta and Sn-MCM-41 Catalysts for the Baeyer-Villiger Oxidation. Collection of Czechoslovak Chemical Communications, 70 (10). pp. 1727-1736. ISSN 0010-0765

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