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Titolo:
SYNTHESES AND STRUCTURES OF BIS(TRICARBONYLCHROMIUM)-SUBSTITUTED ALPHA,OMEGA-DIPHENYLHEXATRIENE COMPLEXES
Autore:
GILBERT TM; HADLEY FJ; SIMMONS MD; BAUER CB; ROGERS RD;
Indirizzi:
NO ILLINOIS UNIV,DEPT CHEM DE KALB IL 60115 ROCKFORD COLL,DEPT CHEM ROCKFORD IL 61108
Titolo Testata:
Journal of organometallic chemistry
fascicolo: 1-2, volume: 510, anno: 1996,
pagine: 83 - 92
SICI:
0022-328X(1996)510:1-2<83:SASOBA>2.0.ZU;2-D
Fonte:
ISI
Lingua:
ENG
Soggetto:
NONLINEAR-OPTICAL-PROPERTIES; SUBSTITUTED (ETA-6-ARENE)CR(CO)3 COMPLEXES; ETA-6-ARENE COMPLEXES; PI-DONOR; CRYSTAL;
Keywords:
CHROMIUM; ARENE COMPLEXES; WITTIG REACTION; DIPHENYLHEXATRIENE; POLYENE;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
T.M. Gilbert et al., "SYNTHESES AND STRUCTURES OF BIS(TRICARBONYLCHROMIUM)-SUBSTITUTED ALPHA,OMEGA-DIPHENYLHEXATRIENE COMPLEXES", Journal of organometallic chemistry, 510(1-2), 1996, pp. 83-92

Abstract

Treatment of several (4-substituted benzaldehyde)chromium tricarbonylcomplexes with bisphosphoranes provides the first examples of (4,4'-substituted alpha, omega-diphenylhexatriene)bis(chromium tricarbonyl) complexes in good yield. Systems containing both donor and acceptor substituents may be prepared. The structures of three examples, E,E,E-eta(6)-4-R-C6H4-(CH=CH)(3)-eta(6)-C6H4-4'-R] [Cr(CO)(3)](2), (R = Me(2)N,1; R = Me(3)Si, 3; R = F3C, 4) have been determined by single crystalX-ray diffraction. The results demonstrate that the olefinic portionsof the molecules adopt the all trans E,E,E conformation, and that thetricarbonylchromium groups adopt anti orientations on each face of the organic plane. Compounds 3 and 4 are soluble enough to allow acquisition of H-1 NMR spectra of sufficient quality to allow the accurate simulation of the resonances corresponding to the olefinic protons. The simulations suggest that the hexatriene moiety behaves as three independent double bonds, in accord with the structural results.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 01/12/20 alle ore 06:10:32