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Titolo:
LANTERN TYPE HETEROBIMETALLIC COMPLEXES - TETRA-MU-4-METHYLPYRIDINE-2-THIOLATO BRIDGED PLATINUM(II)COBALT(II) AND OXIDATION COMPLEXES
Autore:
KITANO K; TANAKA K; NISHIOKA T; ICHIMURA A; KINOSHITA I; ISOBE K; OOI S;
Indirizzi:
OSAKA CITY UNIV,GRAD SCH SCI,DEPT MOL MAT SCI,SUMIYOSHI KU OSAKA 5588585 JAPAN OSAKA CITY UNIV,GRAD SCH SCI,DEPT MOL MAT SCI,SUMIYOSHI KU OSAKA 5588585 JAPAN OSAKA INST TECHNOL,DEPT APPL CHEM,ASAHI KU OSAKA 5358585 JAPAN
Titolo Testata:
Journal of the Chemical Society. Dalton transactions (Print)
fascicolo: 19, , anno: 1998,
pagine: 3177 - 3182
SICI:
0300-9246(1998):19<3177:LTHC-T>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
MIXED-METAL COMPLEX; X-RAY STRUCTURES; CRYSTAL-STRUCTURES; HETERONUCLEAR COMPLEXES; NUCLEOBASE COMPLEXES; COORDINATION GEOMETRIES; BINUCLEAR COMPLEXES; DATIVE BONDS; 2 METALS; LIGANDS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
41
Recensione:
Indirizzi per estratti:
Citazione:
K. Kitano et al., "LANTERN TYPE HETEROBIMETALLIC COMPLEXES - TETRA-MU-4-METHYLPYRIDINE-2-THIOLATO BRIDGED PLATINUM(II)COBALT(II) AND OXIDATION COMPLEXES", Journal of the Chemical Society. Dalton transactions (Print), (19), 1998, pp. 3177-3182

Abstract

A lantern type bimetallic complex [(CH3CN)Co(4-mpyt)(4)Pt] 1 (4-Hmpyt= 4-methylpyridine-2-thiol) was obtained by the reaction of [Pt(4-Hmpyt)(4)]Cl-2 with CoCl2 in the presence of base and recrystallization from acetonitrile. The complex was characterized by single-crystal X-ray crystallography and is paramagnetic. It has a tetragonal Co(4-mpyt)(4)Pt core in which 4-mpyt ligands bridge Pt and Co atoms. The Pt atom has a square-planar co-ordination by four S atoms, whereas the Co atomhas a square-pyramidal co-ordination by five N atoms, the N atom of acetonitrile being located at the axial position of Co. The Co ... Pt distance is 2.573(2) Angstrom. Oxidation of 1 yielded diamagnetic [Co-II(4-mpyt)(4)(PtX)-X-III] type complexes (X = Cl 2a, Br 2b, N-3 2c or NCS 2d): 2a and 2b were obtained by the reaction of 1 with iodobenzene dichloride or Ce-IV in the presence of Br- respectively, while the reaction with pseudo-halides in air gave 2c and 2d. They have been characterized by variable-temperature H-1 NMR and X-ray photoelectron spectroscopies. Complexes 2a-2d exist as the oligomer [{Co(4-mpyt)(4)PtX}(n)] where up to four tetragonal [Co(4-mpyt)(4)PtX] units are linked by Pt-X-Co bridges. Cyclic voltammetry (CV) of 1 in acetonitrile displayeda one-electron oxidation peak at -0.05 V and two rereduction peaks at-0.17 and -0.40 V vs, an Ag-Ag+ electrode at 25 degrees C. The CVs of1 and 2a show similar temperature dependences which can be interpreted on the basis of the dissociation-association equilibrium of the (CoPtIII)-Pt-II species in the co-ordinating solvent.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 03/07/20 alle ore 16:26:04