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Titolo:
The influence of steric congestion on the catalytic performance of Ti-IV active centers in the epoxidation of alkenes
Autore:
Klunduk, MC; Maschmeyer, T; Thomas, JM; Johnson, BFG;
Indirizzi:
Delft,Univ Technol, Fac Sci Appl, Waterman Inst, Organ Chem & Catalysis Lab Delft Univ Technol Delft Netherlands NL-2628 BL gan Chem & Catalysis Lab Royal Inst Great Britain, Davy Faraday Res Labs, London W1X 4BS, England Royal Inst Great Britain London England W1X 4BS London W1X 4BS, England Univ Cambridge, Chem Labs, Cambridge CB2 1EW, England Univ Cambridge Cambridge England CB2 1EW abs, Cambridge CB2 1EW, England
Titolo Testata:
CHEMISTRY-A EUROPEAN JOURNAL
fascicolo: 5, volume: 5, anno: 1999,
pagine: 1481 - 1485
SICI:
0947-6539(199905)5:5<1481:TIOSCO>2.0.ZU;2-X
Fonte:
ISI
Lingua:
ENG
Soggetto:
SILICA SURFACES; SITES; TITANOSILICATES; COMPLEXES; OXIDATION; TI(IV);
Keywords:
BINOL; catalysts; epoxidations; silsesquioxanes; titanium;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
26
Recensione:
Indirizzi per estratti:
Indirizzo: Maschmeyer, T Delft,Univ Technol, Fac Sci Appl, Waterman Inst, Organ Chem & Catalysis Lab Delft Univ Technol Julianalaan 136 Delft Netherlands NL-2628 BL
Citazione:
M.C. Klunduk et al., "The influence of steric congestion on the catalytic performance of Ti-IV active centers in the epoxidation of alkenes", CHEM-EUR J, 5(5), 1999, pp. 1481-1485

Abstract

Elucidation of the catalytic performance of Ti-IV centers in titanium-silica epoxidation catalysts has been probed by studying a range of soluble titanium-based silsesquioxane analogues. Several related and new Ti-IV complexes in which the Ti-IV is coordinated to only one or two siloxides of the silsesquioxane backbone have enabled us to modify, in a controlled fashion, the degree of steric congestion around the active site. It has been shown that the performance of these model catalysts is strongly influenced by the precise nature of the coordination environment about the Ti-IV active site, both in terms of steric crowding and in the likely occurrence of dative bonding.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 17:39:52