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{Formation of Pd2X2(mu-S)(mu-dpm)(2) by reaction of PdX2(dpm) with H2S in the presence of alumina (X = halogen

Title{Formation of Pd2X2(mu-S)(mu-dpm)(2) by reaction of PdX2(dpm) with H2S in the presence of alumina (X = halogen
Publication TypeJournal Article
Year of Publication1999
AuthorsWong, TYH, James, BR, Wong, PC, Mitchell, KAR
JournalJournal of Molecular Catalysis a-Chemical
Volume139
Pagination159-169
Date PublishedMar
Type of ArticleArticle
ISBN Number1381-1169
KeywordsALUMINA, ASPECTS, bis(diphenylphosphino)methane, CONVERSION, CRYSTAL, DERIVATIVES, DINUCLEAR PALLADIUM(I) COMPLEXES, H2S, HYDROGEN-SULFIDE, Mechanistic, models, Pd2X2(mu-S)(mu-dpm)(2), PdX2(dpm), SURFACE
Abstract

Alumina promotes the reaction of PdX2(dpm) (3) (X = Cl, Br, I) with H2S to form Pd2X2(mu-S)(dpm)(2) (2)(1) and HX, with chemisorption of the HX (quantified by titration) providing the driving force; although no intermediate species are detected, the reaction likely proceeds via mercapto species formed via ’alumina activated H2S’. XPS studies show interactions of species 2 and 3 with alumina, these interactions being weak as demonstrated by recovery of the species on dissolution using an appropriate solvent. For the iodide system, adsorbed HI on alumina undergoes partial photodecomposition to give I-2 and H atoms. (C) 1999 Elsevier Science B.V. All rights reserved.

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