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Titolo:
PREPARATION AND STRUCTURAL CHARACTERIZATION OF A SERIES OF TERNARY PALLADIUM(II) BINUCLEAR COMPLEXES CONTAINING TRIAZOLOPYRIMIDINATE BRIDGES
Autore:
NAVARRO JAR; ROMERO MA; SALAS JM;
Indirizzi:
UNIV GRANADA,DEPT QUIM INORGAN,AV FUENTENUEVA S-N E-18071 GRANADA SPAIN UNIV GRANADA,DEPT QUIM INORGAN E-18071 GRANADA SPAIN
Titolo Testata:
Journal of the Chemical Society. Dalton transactions
fascicolo: 6, , anno: 1997,
pagine: 1001 - 1005
SICI:
0300-9246(1997):6<1001:PASCOA>2.0.ZU;2-4
Fonte:
ISI
Lingua:
ENG
Soggetto:
HETERONUCLEAR COMPLEXES; CRYSTAL-STRUCTURES; NMR-SPECTROSCOPY; OXIDATION-STATE; METAL; CHEMISTRY; PLATINUM; LIGANDS; DIAQUA(ETHYLENEDIAMINE)PALLADIUM(II); ISOMERIZATION;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
31
Recensione:
Indirizzi per estratti:
Citazione:
J.A.R. Navarro et al., "PREPARATION AND STRUCTURAL CHARACTERIZATION OF A SERIES OF TERNARY PALLADIUM(II) BINUCLEAR COMPLEXES CONTAINING TRIAZOLOPYRIMIDINATE BRIDGES", Journal of the Chemical Society. Dalton transactions, (6), 1997, pp. 1001-1005

Abstract

The reaction of the [Pd(H2O)(2)(L-L)][NO3](2) electrophiles (L-L = ethane-1,2-diamine 1, propane-1,3-diamine 2, or 2,2'-bipyridine 3) with 4,7-dihydro-5-methyl-7-oxo[1,2,4]triazolo[1, 5-a]pyrimidine (Hmtpo) in1 : 1 molar ratio, in aqueous media (pH 7-8), yielded palladium(II) binuclear complexes of general formula [Pd-2(mu-mtpo-N-3,N-4)(2)(L-L)(2)][NO3](2). The compounds have been structurally characterized by one-and two-dimensional H-1 and C-13 NMR spectroscopy and single-crystal X-ray diffraction (1 and 3). The crystal:structures of both compounds show that the Pd atoms are located in nearly square-planar PdN4 environments Two mtpo ligands arranged in a head-to-tail orientation bridge the two metal centres, giving rise to short intermetallic contacts. The Pd Pd separation appears to be modulated by the interactions betweenthe auxiliary ligands L-L in adjacent co-ordination planes. Thug substitution of ethane-1,2-diamine by planar 2,2'-bipyridine is responsible for a shortening of the intermetallic separation from 3.225(1) Angstrom in compound 1 to 3.034(1) Angstrom in. The NMR data suggest that the structures are preserved in solution.

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Documento generato il 13/07/20 alle ore 19:11:24