Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Synthesis, structures and P-31 NMR studies of bis(diphenylphosphino)methane adducts of copper and silver thiocarboxylates
Autore:
Deivaraj, TC; Vittal, JJ;
Indirizzi:
Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore Natl Univ Singapore Singapore Singapore 117543 ngapore 117543, Singapore
Titolo Testata:
JOURNAL OF THE CHEMICAL SOCIETY-DALTON TRANSACTIONS
fascicolo: 3, , anno: 2001,
pagine: 322 - 328
SICI:
1472-7773(2001):3<322:SSAPNS>2.0.ZU;2-Y
Fonte:
ISI
Lingua:
ENG
Soggetto:
DPPM = BIS(DIPHENYLPHOSPHINO)METHANE; RAY CRYSTAL-STRUCTURE; CU-I INTERACTION; HYDROGEN-BOND; COMPLEXES; CHEMISTRY; LIGANDS; SPECTRA; CLUSTER; CUPROPHILICITY;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
51
Recensione:
Indirizzi per estratti:
Indirizzo: Vittal, JJ Natl Univ Singapore, Dept Chem, 3 Sci Dr 3, Singapore 117543, Singapore Natl Univ Singapore 3 Sci Dr 3 Singapore Singapore 117543 pore
Citazione:
T.C. Deivaraj e J.J. Vittal, "Synthesis, structures and P-31 NMR studies of bis(diphenylphosphino)methane adducts of copper and silver thiocarboxylates", J CHEM S DA, (3), 2001, pp. 322-328

Abstract

The compounds [Cu-3(mu -dppm)(3)(SC{O}Me)(2)][PF6] 1, [Cu-3(mu -dppm)(3)(SC{O}Ph)(2)][X] (X = ClO4 2 or PF6 2a) were synthesized by treating Na+R{O}CS- (R = Me or Ph) with a mixture of [Cu(MeCN)(4)]X (X = PF6 or ClO4) and bis(diphenylphosphino)methane (dppm) in stoichiometric ratios. The structuresof 1 and 2 have been determined by single crystal X-ray crystallography. The trinuclear core is held intact by the three bridging dppm ligands and two capping thiocarboxylate anions. One of the thiocarboxylate anions triply bridges to the Cu-3(mu -dppm)(3) core through a mu (3)-S and the other by amu (3)-S,O bonding mode. Compounds [Ag-3(mu -dppm)(3)(SC{O}Me)(2)][X] (X =NO3 3 or ClO4 3a) and [Ag-3(mu -dppm)(3)(SC{O}Ph)(2)][ClO4] 4 were prepared by treating Na+R{O}CS- (R = Me or Ph) with dppm and the corresponding silver salt. The structures of 3 and 4 were determined by X-ray crystallography. Both the thiocarboxylate anions bond in mu -S fashion, thereby stabilizing the trinuclear core. In all the four crystal structures C-H . . .O hydrogen bonding is present between one of the methylene hydrogen atoms and the carbonyl oxygen of the thiocarboxylate ligand. P-31 NMR studies in solutionat low temperatures reveal that all the compounds retain their trinuclear core in solution, while intramolecular exchange involving dppm does not cease even at lower temperatures. Attempts to prepare monocapped trinuclear cations, [M-3(mu -dppm)(3)(SC{O}R)](2+), and binuclear neutral compounds, [M-2(mu -dppm)(2)(SC{O}R)(2)], yielded only the corresponding bicapped trinuclear compounds.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 15/07/20 alle ore 08:36:30