SYNTHESIS AND STUDY OF MIXED LIGAND COMPLEX COMPOUNDS OF Lа(III) AND Ce(III) WITH 2-AMINOBENZIMIDAZOLE AND SALICYLIC ACID.

Background. There is no information in the literature about the synthesis of complex compounds of rare earth elements with 2-aminobenzimidazole and salicylic acid and their properties. This work is aimed at a systematic study of the synthesis, structure and properties of previously unknown complex compounds of some rare earth elements with 2-aminobenzimidazole and salicylic acid. Purpose. Development of a procedure for the synthesis of new mixed-ligand complex compounds of lanthanum (III) and cerium (III) with salicylic acid (HSal) and 2-aminobenzimidazole (ABI). Study of the composition and structure of the synthesized complex compounds by modern physicochemical methods. Methodology. Quantum chemical calculations, IR spectroscopy, elemental, thermogravimetric, SEMEDX, fluorescence analyzes. Originality. Mixed ligand complexes of lanthanum and cerium (III) with 2-aminobenzimidazole (ABI) and salicylic acid (HSal) were synthesized for the first time. Findings. Competing donor centers, electronic and geometric structures of the ligand molecule were studied by quantum-chemical calculation method. The composition and structure of the synthesized new complex compounds of lanthanides was determined by quantum-chemical, IR-spectroscopic, thermogravimetric, fluorescent analysis and SEM-EDX. [ABSTRACT FROM AUTHOR]