Synthesis of Nickel(II) Complexes Using Malonodihydrazone Ligands Having Long Chain Pendent Arms

The Schiff base complexes of transition metals have been widely used in biological, industrial and analytical fields. The present work is synthesis and characterization of some complexes. The complexes K2[Ni(C­31H26N4O4)2], K2[Ni(C29H38N­4O4)2], and K2[Ni(C41H62N4O2)4], have been prepared by the reaction of Schiff bases with nickel(II) acetate tetrahydrate in the presence of base (KOH) in 2:1 molar ratio. The Schiff base ligands e.g. L'H2, L''H2­ and L'''H2­ were prepared from the reaction of malonodihydrazide with 4-benzyloxybenzaldehyde, 4-hexyloxybenzaldehyde and 4-dodecyloxybenzaldehyde.Where L'H2­represents L''H2, represents L'''H2 represents The complexes 1-3 have been characterized on the basis of elemental analysis, metal estimation, magnetic moments, conductance measurements, IR and UV-visible spectra and study of other physical properties. The suggested structures of the complexes 1-3 are square planar in nature.