SYNTHESIS AND CHARACTERIZATION OF LANTHANIDE(III) COMPLEXES OF 1-NAPHTHOXY-QUINOLINYLOXYACETIC, 2-NAPHTHOXY-QUINOLINYLOXYACETIC AND 8-QUINOLINYLOXYACETIC ACIDS

Lanthanum(III), praseodymium(III), neodymium(III), samarium(III), gado linium(III), terbium(III) and dysprosium(III) chelates of the type [M( RCOO)3].2H2O with the ligands 1-naphthoxy-, 2-naphthoxy- and 8-quinoli nyloxyacetic acids have been isolated and characterized on the basis o f elemental analyses, spectral, magnetic and thermal data. The IR data show that the bonding of the carboxylato group to the metal ion is bi dentate. A coordination number of six is suggested for the rare earth metal ions in these complexes.