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Titolo:
METAL-COMPLEXES WITH ATROPISOMERIC SULFUR LIGANDS IN ASYMMETRIC HYDROFORMYLATION X-RAY STRUCTURE OF [RH-2(MU-BIPHES)(COD)(2)] (H(2)BIPHES =4,4'-BIPHENANTHRENE-3,3'-DITHIOL)
Autore:
RUIZ N; AALITI A; FORNIESCAMER J; RUIZ A; CLAVER C; CARDIN CJ; FABBRI D; GLADIALI S;
Indirizzi:
UNIV ROVIRA & VIRGILI,DEPT QUIM,PL IMPERIAL TARRACO 1 TARRAGONA 43005SPAIN UNIV ROVIRA & VIRGILI,DEPT QUIM TARRAGONA 43005 SPAIN UNIV ABDELMALEK ESSAADI,DEPT CHIM TETOUAN MOROCCO UNIV READING,DEPT CHEM READING RG6 6AD BERKS ENGLAND CNR,IST APPLICAZ TECN CHIM AVANZATE PROBLEMI AGROBIOL I-07100 SASSARIITALY UNIV SASSARI,DIPARTIMENTO CHIM I-07100 SASSARI ITALY
Titolo Testata:
Journal of organometallic chemistry
, volume: 546, anno: 1997,
pagine: 79 - 87
SICI:
0022-328X(1997)546:<79:MWASLI>2.0.ZU;2-#
Fonte:
ISI
Lingua:
ENG
Soggetto:
RHODIUM COMPLEXES; ENANTIOSELECTIVE HYDROFORMYLATION; SELECTIVE HYDROFORMYLATION; CRYSTAL-STRUCTURE; CRUCIAL INFLUENCE; CATALYSTS; OLEFINS; DERIVATIVES; MU;
Keywords:
RHODIUM; IRIDIUM; ATROPISOMERIC SULFUR LIGANDS; ASYMMETRIC HYDROFORMYLATION;
Tipo documento:
Article
Natura:
Periodico
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
N. Ruiz et al., "METAL-COMPLEXES WITH ATROPISOMERIC SULFUR LIGANDS IN ASYMMETRIC HYDROFORMYLATION X-RAY STRUCTURE OF [RH-2(MU-BIPHES)(COD)(2)] (H(2)BIPHES =4,4'-BIPHENANTHRENE-3,3'-DITHIOL)", Journal of organometallic chemistry, 546, 1997, pp. 79-87

Abstract

The addition of the atropisomeric racemic sulfur compound 4,4'-biphenanthrene-3,3'-dithiol (H(2)biphes) to a dichloromethane solution of [{M(mu-OMe)(cod)}(2)] (M = Rh, Ir, cod = cycloocta-1,5-diene) afforded the dithiolate-bridged complexes [{Rh-2(mu-biphes)(cod)(2)}(n)] (n = 2 5 or n = 1 6) and [{Ir-2(mu-biphes)(cod)(2)}].nCH2Cl2 7. When 1,1'-binaphthalene-2,2'-dithiol (H(2)binas) reacted with [{Ir(mu-OMe)(cod)}(2)], complex [Ir-2(mu-binas)(cod)(2)] 8 was obtained. Complexes 5 and 6 reacted with carbon monoxide to give the dinuclear tetracarbonyl complex [Rh-2(mu-biphes)(CO)(4)] 9. The reaction of 9 with PR3 provided themixed-ligand complexes [{Rh-2(mu-biphes)(CO)(2)(PR3)}(2)]. xCH(2)Cl(2) (R = Ph, x = 2 10, C6H11, x = 1 11) and [{Rh-2(mu-biphes)(CO)(3)(PR3)}(2)]. CH2Cl2 12 (R = OC6H4But-o). The crystal structure of 6 was determined by X-ray diffraction. Reaction of the dithioether ligand Me(2)biphes with [Rh(cod)(2)]ClO4 in CH2Cl2 solution afforded the cationic complex [Rh(cod)(Me(2)biphes)]ClO4 . CH2Cl2 13. Asymmetric hydroformylation of styrene was performed using the complexes described. The extent of aldehyde conversion ranges from 53 to 100%, with selectivities towards branched aldehydes in the range 51 to 96%. The enantioselectivities were quite low and did not exceed 20%. (C) 1997 Elsevier Science S.A.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 29/11/20 alle ore 02:58:23