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Titolo:
Tuning the selectivity of heterogeneous catalysts: A trimetallic approach to reductive coupling of chloroarenes in water
Autore:
Mukhopadhyay, S; Rothenberg, G; Sasson, Y;
Indirizzi:
Hebrew Univ Jerusalem, Casali Inst Appl Chem, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem Jerusalem Israel IL-91904 -91904 Jerusalem, Israel Univ York, Dept Chem, York Green Chem Grp, York YO10 5DD, N Yorkshire, England Univ York York N Yorkshire England YO10 5DD O10 5DD, N Yorkshire, England Univ Calif Berkeley, Dept Chem Engn, Berkeley, CA 94720 USA Univ Calif Berkeley Berkeley CA USA 94720 em Engn, Berkeley, CA 94720 USA
Titolo Testata:
ADVANCED SYNTHESIS & CATALYSIS
fascicolo: 3, volume: 343, anno: 2001,
pagine: 274 - 278
SICI:
1615-4150(200104)343:3<274:TTSOHC>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
PALLADIUM; ZINC; HALOARYLS; HYDROGEN; BIARYLS;
Keywords:
bismuth; C-C coupling; chloroarenes; heterogeneous catalysis; palladium; trimetallic catalysis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
25
Recensione:
Indirizzi per estratti:
Indirizzo: Sasson, Y Hebrew Univ Jerusalem, Casali Inst Appl Chem, IL-91904 Jerusalem, Israel Hebrew Univ Jerusalem Jerusalem Israel IL-91904 usalem, Israel
Citazione:
S. Mukhopadhyay et al., "Tuning the selectivity of heterogeneous catalysts: A trimetallic approach to reductive coupling of chloroarenes in water", ADV SYNTH C, 343(3), 2001, pp. 274-278

Abstract

Reductive homocoupling of chlorobenzenes to the respective biphenyls affords high yields (93-95%), in the presence of catalytic PEG-400 and 0.4 mol %of a recycleable, heterogeneous trimetallic catalyst (4% Pd, 1% Pt, and 5%Bi on carbon). The competing reduction process is minimized. The catalyticcycle is completed using hydrogen gas, or formate + water or zinc + water mixtures, which generate dihydrogen in situ. Primary kinetic data and some process parameters are studied. The roles of the Pd, Pt, and Bi, different reducing agents, and the phase-transfer agent are discussed. The reaction mechanism is proposed to depend on the relative concentration of hydride species in the immediate vicinity of the palladium metal.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/04/20 alle ore 11:39:15