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Titolo:
Synthesis of mixed chalcogenido-bridged dirhenium complexes of the type Re-2(mu-ER)(mu-E ' R')(CO)(8) (E, E ' = S, Se, Te; R, R ' = org. residue)
Autore:
Egold, H; Florke, U;
Indirizzi:
Univ Gesamthsch Paderborn, D-33098 Paderborn, Germany Univ Gesamthsch Paderborn Paderborn Germany D-33098 8 Paderborn, Germany
Titolo Testata:
ZEITSCHRIFT FUR ANORGANISCHE UND ALLGEMEINE CHEMIE
fascicolo: 9, volume: 627, anno: 2001,
pagine: 2295 - 2305
SICI:
0044-2313(200109)627:9<2295:SOMCDC>2.0.ZU;2-G
Fonte:
ISI
Lingua:
ENG
Soggetto:
NUCLEAR MAGNETIC-RESONANCE; CLUSTER COMPLEXES; ORGANOTELLURIUM COMPOUNDS; CARBONYL-COMPLEXES; CRYSTAL-STRUCTURES; REACTIVITY; LIGANDS; SULFIDO; RHENIUM; CHEMISTRY;
Keywords:
rhenium; metal carbonyl complexes; organochalcogenolato bridges; hydrido bridged complexes;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
39
Recensione:
Indirizzi per estratti:
Indirizzo: Egold, H Univ Gesamthsch Paderborn, Warburger Str 100, D-33098 Paderborn, Germany Univ Gesamthsch Paderborn Warburger Str 100 Paderborn Germany D-33098
Citazione:
H. Egold e U. Florke, "Synthesis of mixed chalcogenido-bridged dirhenium complexes of the type Re-2(mu-ER)(mu-E ' R')(CO)(8) (E, E ' = S, Se, Te; R, R ' = org. residue)", Z ANORG A C, 627(9), 2001, pp. 2295-2305

Abstract

Hydrido sulfido bridged complexes Re-2(mu -H)(mu -SR)(CO)(8) (R = Ph, naph, Cy) react with the base DBU to give the salts [DBUH][Re-2(mu -SR)(CO)(8)]. Upon addition of electrophiles R 'E ' Br (E 'R = SPh, SePh, TePh) to the in situ prepared salts mixed chalcogenido bridged complexes RC2(mu -SR)(mu -E 'R ')(CO)(8) were formed. The structures of the new compounds Re-2(mu -SCy)(mu -SePh)(CO)(8) and Re(mu -Snaph)(mu -TePh)(CO)(8) were determined by single crystal X-ray analyses. For the preparation of analogous selenido tellurido bridged complexes Re-2(mu -SePh)(mu -TeR)(CO)(8) the novel hydrido selenido bridged complex Re-2(mu -H)(mu -SePh)(CO)(8) was prepared from Re-2(CO)(8)(NCMe)(2) and PhSeH. Its structure was determined by single crystalX-ray analysis. Subsequent deprotonation with DBU gave in situ [DBUH][Re-2(mu -SePh)(CO)(8)] which upon addition of RTeBr (R = Ph, Bu-n, Bu-t) formedthe desired complexes Re-2(mu -SCPh)(mu -TeR)(CO)(8). The reaction with (BuTeBr)-Te-t also yielded the novel spirocyclic Complex (mu (4)-Te)[Re-2(mu -SePh)(CO)(8)](2) in low amounts. It was identified by single crystal X-rayanalysis. Re-2(mu -SePh)(mu -TeBut)(CO)(8) is oxidised in chloroform in the presence of air to give the novel complex (mu -Te-Te-mu)[Re-2(mu -SePh)(CO)(8)](2). All mixed chalcogenido bridged dirhenium complexes were proved to be dynamic in solution by C-13 NMR spectroscopy. The dynamic behaviour isbased on the fast and permanent inversion of the sulfido and selenido bridges. The tellurido bridges are rigid on the time scale of C-13 NMR spectroscopy.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/12/20 alle ore 12:05:39