ABSTRACT
A large number of inorganic compounds are known to contain metal ions of the same element in two different formal oxidation states, but few organometallic compounds of this type have been reported. Cowan et al. reported biferrocene Fe [II] Fe [III] picrate and Vertes and Suba examined the mixed iron states in formamide. The reaction between para phenylene diamine and aliphatic dibasic acids depends upon the molar ratio of the reactants and the experimental conditions employed. At a 1 : 4 molar ratio [para phenylene diamine: oxalic acid] under reflux condition, the tetrafunctional compounds is obtained. More recently tetrabasic [tetrasuccinyl urea] and tetraoxalyl urea were prepared]. The present work is mainly concerned with the reaction of para phenylene diamine with oxalic acid. The aim is to produce tetrafunctional product [tetraoxalyl para phenylene diamine][To p-phD] and to investigate the formation of Iron [II] and [III] complexes by Mossbauer and Infra-red spectroscopy