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Platinum carbonyl derived catalysts on inorganic and organic supports: a comparative study

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Title Platinum carbonyl derived catalysts on inorganic and organic supports: a comparative study
 
Creator PAUL, HIMADRI
BASU, SUSMIT
BHADURI, SUMIT
LAHIRI, GOUTAM KUMAR
 
Subject platinum carbonyl cluster
hydrogenation
catalysis
polystyrene
inorganic oxides
 
Description Fumed silica, silica gel, silica–alumina and cross-linked (5.5%) polystyrene have been functionalized with quaternary ammonium groups and the Chini cluster [Pt12(CO)24]2− has been anchored onto these functionalized materials by ion pairing. A catalyst has also been prepared by the adsorption of Na2[Pt12(CO)24] on unfunctionalized fumed silica. The catalytic activities of the resultant materials, and that of commercially purchased 5% platinum on alumina have been studied for the hydrogenation of a variety of unsaturated compounds. The substrates studied are: α-acetamidocinnamic acid, cyclohexanone, acetophenone, methyl pyruvate, ethyl acetoacetate, nitrobenzene and benzonitrile. Compared to the polystyrene supported catalyst, the inorganic oxide supported catalysts have higher surface areas and for most of the substrates have notably higher activities. The functionalized fumed silica-based catalyst gives higher conversions than functionalized silica gel and silica–alumina-based catalysts. In the hydrogenation of acetophenone and ethyl acetoacetate, the functionalized fumed silica-based catalyst show superior activity compared to the commercial platinum catalyst, and the catalyst made by conventional adsorption method. In benzonitrile hydrogenation with all the cluster-derived catalysts a hydrazine derivative is selectively formed, but when the commercial platinum catalyst is used benzyl amine is the main product.
 
Publisher Elsevier
 
Date 2009-03-23T05:12:10Z
2011-11-25T20:05:56Z
2011-12-26T13:08:01Z
2011-12-27T05:56:02Z
2009-03-23T05:12:10Z
2011-11-25T20:05:56Z
2011-12-26T13:08:01Z
2011-12-27T05:56:02Z
2004
 
Type Article
 
Identifier Journal of Organometallic Chemistry 689(2), 309-316
0022-328X
http://dx.doi.org/10.1016/j.jorganchem.2003.10.017
http://hdl.handle.net/10054/1059
http://dspace.library.iitb.ac.in/xmlui/handle/10054/1059
 
Language en