2-hydroxy naphthyl-1-azo-Bacetylacetone [HNAAA] as chelating agent for alkaline earth and bivalent metal ions of the first transition series

ABSTRACT

The members of a new series of [M [HNAAA]]. x H2O are prepared, where, M = Ca[2+], Mn[2+], Fe[2+], Co[2+], Ni[3+],Cu[2+], Zn[2+], Mg[2+] and Sr[2+] and [HNAAA] is 2-hydroxy naphtnyl-1-azo Beta- acetylacetone [a dibasic tridentate ligand]. The complexes are-Subjected to elemental micro analysis and characterized by ir, electronic and [1] H nmr spectra, DTA and x-ray analysis. The stability constants of the complexes formed are determined by potentiometric techniques and discussed in relation to the ionic potentials