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Titolo:
Chiral gallium and indium alkoxometalates
Autore:
Pauls, J; Chitsaz, S; Neumuller, B;
Indirizzi:
Univ Marburg, Fachbereich Chem, D-35032 Marburg, Germany Univ Marburg Marburg Germany D-35032 eich Chem, D-35032 Marburg, Germany
Titolo Testata:
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
fascicolo: 9, volume: 626, anno: 2000,
pagine: 2028 - 2034
SICI:
0044-2313(200009)626:9<2028:CGAIA>2.0.ZU;2-D
Fonte:
ISI
Lingua:
GER
Soggetto:
CRYSTAL-STRUCTURES; HETEROBIMETALLIC COMPLEXES; SUPEREXCHANGE; CATALYSTS;
Keywords:
BINOL; chiral ligands; gallium compounds; indium compounds; crystal structures;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
32
Recensione:
Indirizzi per estratti:
Indirizzo: Neumuller, B Univ Marburg, Fachbereich Chem, D-35032 Marburg, Germany UnivMarburg Marburg Germany D-35032 35032 Marburg, Germany
Citazione:
J. Pauls et al., "Chiral gallium and indium alkoxometalates", Z ANORG A C, 626(9), 2000, pp. 2028-2034

Abstract

Li-2(S)-BINOLate ((S)-BINOL = (S)-(-)-2,2'-Dihydroxy-1,1'-binaphthyl) generated by dilithiation of (S)-BINOL with two equivalents (BuLi)-Bu-n was reacted with GaCl3 und InCl3 in THF to the alkoxometalates [{Li(THF)(2)}{Li(THF)}(2){Ga((S)-BINOLate)(3)}] (1) and [{Li(THF)(2)}(2){Li(THF)}{In((S)-BINolate)(3))] . [{Li(THF)(2)}{Li(THF)}(2){In((S)-BINOLate)(3)}](2) (3), respectively. 1 and 3 crystallize from THF/toluene mixtures as 1 . 2 toluene and 3. 8 toluene. The treatment of PhCH2GaCl2 with Li-2(S)-BINOLate in THF under reflux, followed by recrystallization of the product from DME gives the gallate [{Li(DME)}(3){Ga((S)-BINOLate)(3)}] . 1.5 THF (2 . 1.5 THF). 1-3 were characterized by NMR, IR and MS techniques. In addition, 1 . 2 toluene, 2. 1.5 THF and 3 . 8 toluene were investigated by X-ray structure analyses. According to them, a distorted octahedral coordination sphere around the group 13 metal was formed, built-up by three BINOLate ligands. The three Licounter ions act as bridging units by metal-oxygen coordination. The coordination sphere of the Li+ ions was completed, depending on the available space, by one or two THF ligands (1 . 2 toluene, 3 . 8 toluene) and one DME ligand (2 . 1.5 THF), respectively. The sterical dominance of the BINOLate ligands can be shown by the almost square-planar coordination of the Li+ ions in 2 . 1.5 THF giving a small twisting angle of only 17 degrees.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 28/11/20 alle ore 02:55:17