Synthesis and structural characterization of Schiff base complexes of Pd~(II), Rh~(III) and Ru~(III)

摘要

A bidentate ligand, 2-hydroxy-1-naphthalidene-4'-nitroaniline (HNNA) was synthesized from 2-hydroxy-1-naphthaldehyde and 4-nitroaniline. Its metal complexes of general formula M(HNNA)2 where M = Pd~(II) and [M(HNNA)2X.H2O].2H2O where M = Rh~(III) and Ru~(III) and X = Cl have been prepared. All the complexes were characterized using various physico-chemical methods such as elemental analysis, thermal analysis and spectral (IR, electronic and NMR) analysis. The Rh~(III) and Ru~(III) complexes have octahedral structures while Pd~(II) complex has square planar geometry.