Preparation and characterization of 4-[6-(purinyl)azo]-1-naphthol and some transition metal complexes

Abstract

The New bidentate azo dye ligand 4-[(6-purinyl)azo]1-naphthol (PAN) was
prepared by reacting a diazonium salt solution of 6-amino purine with 1-naphthol in
alkaline solution .
The ligand and its complexes with metal ions; Fe(), Co (), Ni ()and Cu
()were prepared and characterized by infra-red ( FT.IR) , Uv-visible spectroscopy ,
atomic absorption ,(C.H.N) analysis , Magnetic susceptibility and molar conductivity
measurements .
All complexes were found to have a general formula [M(PAN)2(H2O)2]Cl2 . The
complexes with 1:2 (M:L) showed octahedral geometry around metal ions .The molar
conductance data reveal that complexes are electrolytes 2:1, IR spectra show that the
ligand is coordinated to the metal ions in a 4-(6-purine azo )-1-naphthol through the azo
N and purine heterocyclic N .