Synthesis and spectroscopic studies of the nicotinamide adducts of cobalt(II), nickel(II) and zinc(II) chlorides

Abstract

Nicotinamide (na) adducts of Co(II), Ni(II) and Zn(II) chlorides are synthesized and characterized by thermoanalytical methods (TG, DTG, DTA), FT IR (4000-400 cm(-1)) and UV/Vis spectroscopy. Structural similarity is inferred between the octahedral Co and Ni compounds of type [M(na)(2)(H2O)(4)]Cl-2. The tetrahedral Zn complex [Zn(na)(2)Cl-2] presents a different structure. The coordination of the metal ions in the Co and Ni adducts modelled by semiempirical theoretical methods compares well with the structural data for [Ni(na)(2)(H2O)(4)](NO3)(2). 2H(2)O.