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Titolo:
CONFORMATIONAL STUDIES OF MIXED-LIGAND COPPER(II) CHELATES - CRYSTAL AND MOLECULAR-STRUCTURE OF AMINOETHANE)(1-PHENYL-1,3-BUTANEDIONATO)COPPER(II) PERCHLORATE
Autore:
TSIAMIS C; TZAVELLAS LC; KAVOUNIS CA; CARDIN CJ;
Indirizzi:
UNIV THESSALONIKI,DEPT CHEM GR-54006 THESSALONIKI GREECE UNIV THESSALONIKI,DEPT CHEM GR-54006 THESSALONIKI GREECE UNIV THESSALONIKI,DEPT PHYS GR-54006 THESSALONIKI GREECE UNIV READING READING RG2 6RD BERKS ENGLAND
Titolo Testata:
Inorganica Chimica Acta
fascicolo: 2, volume: 254, anno: 1997,
pagine: 411 - 415
SICI:
0020-1693(1997)254:2<411:CSOMCC>2.0.ZU;2-9
Fonte:
ISI
Lingua:
ENG
Soggetto:
BETA-KETOENOLS; COMPLEXES; 1,2-DIAMINES; SPECTRA;
Keywords:
CRYSTAL STRUCTURES; COPPER COMPLEXES; MIXED-LIGAND COMPLEXES; CHELATE COMPLEXES; BETA-DIONATO COMPLEXES;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
22
Recensione:
Indirizzi per estratti:
Citazione:
C. Tsiamis et al., "CONFORMATIONAL STUDIES OF MIXED-LIGAND COPPER(II) CHELATES - CRYSTAL AND MOLECULAR-STRUCTURE OF AMINOETHANE)(1-PHENYL-1,3-BUTANEDIONATO)COPPER(II) PERCHLORATE", Inorganica Chimica Acta, 254(2), 1997, pp. 411-415

Abstract

The IR and ligand field spectra and the structure of the mixed-ligandcompound thyl-1,2-diaminoethane(1-phenyl-1,3-butanedionato) (perchlorato)copper(II)]), [Cu(dmeen)bzac(OClO3)], are reported. The structure was determined by single crystal X-ray diffraction analysis (triclinic, space group P (1) over bar, a = 8.581(6), b = 9.669(6), c = 12.664(6) Angstrom, alpha = 103.32(6), beta = 103.33(6), gamma = 91.43(6)degrees, Z = 2, R = 0.0628, R(w) = 0.1607). The structure is square pyramidal with the apical position occupied by one oxygen of the tetrahedral perchlorato group (distance from copper 2.452(5) Angstrom). The plane of the phenyl ring is tilted forming an angle of 16.72(14)degrees withthe plane of the beta-dionato moiety. The nitrogenous base adopts thegauche conformation with torsional angle of 108.72(14)degrees. The ethyl group is cis oriented relative to the phenyl group, occupying the equatorial position with the vector of the carbon-nitrogen bond forming an angle of 143.9(3)degrees with the CuNN plane. The interactions ofthe adjacent axial hydrogen with an oxygen of the perchlorato group result in hydrogen bond formation. The IR spectra reveal that in the solid state the Br- or Cl- displace easily the ClO4- group. The shifts in the ligand field spectra indicate that polar solvents participate indonor-acceptor interactions with the metal centre along an axis perpendicular to the CuN2O2 plane.

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Documento generato il 24/11/20 alle ore 14:30:12