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CHEMISTRY AND CHEMICAL ENGINEERING

CHEMISTRY AND CHEMICAL ENGINEERING

Abstract

The synthesis of mixed ligand coordination compounds of copper, cobalt and nickel formates with formamide and urea in an aqueous solution was carried out. The metal content in the complexes was determined by complexometric titration. Using IR spectroscopy, it was proved that the coordination of formamide and urea with the complexing atom is carried out through the oxygen atom of the carbonyl group. The absorption spectrum of coordinated water is also present in the IR spectrum. The nature of the change in the frequency of stretching vibrations of the –OH group in the composition of water indicates its location in the nearest coordination sphere of the central atom. Derivatographic analysis investigated the thermal behavior of the obtained compounds. Based on the nature of the heating curves, sequential cleavage of water and ligands is shown and a molecular formula for synthesized compounds is proposed. The equation of the synthesis reaction of these coordination compounds is also given.

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