Studies on the Co [II], Ni [II], Cu [II], Zn [II] and Fe [III] chelates with some derivatives of 2-hydroxyphenylazo-B-naphthol

ABSTRACT

The coordination of transition metal ions to chelating azodyes have been investigated by many authors [1-8]. The object of the present investigation is to study the stoichiometry and structure of the complexes formed between Co[2+], Ni[2+] Cu[2+], Zn[2+] and Fe[3+] and some derivatives of 2- hydroxyphenylazo-B-naphthol. The complexes are characterized by conductometric and potentiometric titrations, elemental, analyses, TGIR, 1HNMR, electronic and ESR spectra