SYNTHESIS, CHARACTERIZATION AND STRUCTURE OF COMPLEXES OF 4-[2-(4-DIMETHYLAMINO PHENYL)-VINYL]-1-METHYLPYRIDINIUM PENTANITRATO AND HEXANITRATO LANTHANIDES

The title complexes have been synthesized by the reaction of lanthanid e nitrate, Ln(NO3)3(H2O)x, with 4-[2-(4-dimethylamino phenyl)-vinyl]-1 -methylpyridinium nitrate in anhydrous ethanol and have been character ized by TG-DTA, molar conductance, IR, UV, H-1 NMR spectra and X-ray p owder diffraction. The crystal structure of the La complex was investi gated using a four-circle single-crystal X-ray diffractometer. The La atom is 12-coordinate with six bidentate nitrates forming a slightly d istorted icosahedral geometry.