CRYSTAL-STRUCTURE, SPECTROSCOPIC, MAGNETOCHEMICAL, THERMOANALYTICAL AND ELECTROCHEMICAL PROPERTIES OF BINUCLEAR COPPER(II) COMPLEXES OF SUPROFEN

The crystal structure of the binuclear Cu(II) complex [Cu(Sup)(2)CH3CN ](2) (Sup = deprotonated Suprofen), obtained by ligand exchange betwee n [Cu(Sup)(2)H2O](2) and acetonitrile, has been solved by single cryst al X-ray diffractometry. It exhibits the typical structural characteri stics common to other dimeric Cu(II) complexes bridged by carboxylate ligands. IR and Raman spectra of the two complexes have been analyzed in detail and assigned on the basis of the structural data. Electronic spectra of the solid aquo-complex and its acetonitrile and methanol s olutions were also recorded and discussed. Its magnetic susceptibility has been investigated between 5 and 400 K, and complemented with elec tron spin resonance measurements. Thermogravimetric analysis and diffe rential thermal analysis data, obtained in oxygen atmosphere, are also reported. The electrochemical behavior has been investigated by cycli c voltammetry, in methanolic and acetonitrilic solutions. (C) 1998 Els evier Science S.A.