Cu AND Mn COMPLEXES OF NICOTINIC ACID AND IMIDAZOLE: A CURRENT REVIEW.

Abstract

The copper(II) and Mn(II) complexes with nicotinic acid and imidazole ligands have potentially donor and acceptor character in the formation of a coordination bond and a hydrogen bond. They can function as a ligand-complex or as a self-complementary building block for the construction of the assembly structure due to the formation of a coordination bond or a hydrogen bond. In such self-complementary complexes, the monomer is stabilized as a protonated species under acidic conditions, while under appropriate basic conditions the generated imidazolate nitrogen atom coordinates to the Cu(II) and Mn(II) ion of the adjacent unit or hydrogen-bonds to the imidazole as well as nicotinic acid group of the adjacent unit to give assembly structures in the crystals, depending on the ligand framework and the preferred coordination number of the Cu(II) and Mn (II) ion. Numerous methods for the synthesis of imidazole and nicotinic acid complexes of Cu(II) and Mn(II) also their various structure reactions offer enormous scope in the field of medicine chemistry. Copy Right, IJAR, 2017,. All rights reserved. Introduction:-Copper is metal atom with atomic number 29 and its symbol is Cu. It is ductile having high electrical and thermal conductivity. Copper is found naturally as native Cu. Copper shows Cu +1 and Cu +2 oxidation states and sometimes also shows Cu +3 oxidation state. Cu +1 are diamagnetic and are colorless. Cu +1 is stable mostly in solid form and Cu +2