A new Schiff base (H3L) was obtained through the reaction of 2,4-dihydroxybenzaldehyde with anthranilic acid in alcohol [Ln(H2L)2NO3] (Ln = La, Pr, Nd, Sm. Gd, Dy, Ho, Er, Yb), which were not reported previously, were synthesized using an improved method and characterized by elemental anal., molar conductivity, TG-DTA, IR, UV and NMR spectra. The ligand, which acts as tridentate in the complexes, forms a double 6-membered ring structure with Ln(III). These complexs can be used as a new catalyst in the polymerisation of Me methacrylate.

Key words: ULTRAVIOLET SPECTROPHOTOMETRY, METHYLMETHACRYLATE, INFRARED SPECTROPHOTOMETRY, NMR SPECTROMETRY, BENZENECARBOXYLIC ACID P, YTTRIUM COMPLEX, HOLMIUM COMPLEX, THERMOGRAVIMETRY, YTTERBIUM COMPLEX, DIFFERENTIAL THERMAL ANALYSIS