electrochemical formation of nitrosonaphthol complexes I. Spectral, magnetic and thermal studies of Fe [II], Co [II], Ni [II], Cu [II] and Cd [II] complexes

ABSTRACT

Electrochemical and chemical reaction of alpha-nitroso-beta-naphthol [HL] with some transition metals gave complexes of the type ML2nH2O and MLCl[H2O]nH2O. The mixed ligand adduct [CuL2L]2H2O was also prepared, where L=1,10-phenanthroline. The complexes have been characterized by elemental analyses and differential thermal analysis [DTA]. The thermal stability of the investigated complexes is discussed in terms of the type of metal ions and structure of the complexes. The energy of activation of the thermal decomposition is determined. The bonding of the complexes is confirmed IR spectra while, the electronic and ESR-spectra as well as magnetic measurements indicated the arrangement of the ligand groups around the central metal ions