A Study of Adduct Formation of Heterocyclic Nitrogen Bases with Nickel(II) Chelate of Di-(2-Bromo,4-Methylphenyl) Carbazone

Abstract

Adduct formation constants of various heterocyclic nitrogen bases with Ni(II) chelate of di(2-bromo,4-methylphenyl) carbazone have been determined in a monophase chloroform by spectrophotometric study. The monodentate and bidentate bases form penta and hexacoordinated adducts respectively with 1:1 stoichiometry for metal-chelate-base. The behaviour of some saturated heterocyclic bases like pyrrolidine, piperidine, hexamethyleneimine and morpholine has also been studied. The results are discussed in terms of steric hindrance, basicity and ring structure of the heterocyclic bases used.