Mixed-Ligand Complexes of Copper(II), Palladium(II) and Platinum(IV) with Homophthalic Acid and Heterocyclic Bases

Abstract

New raixed-ligand complexes of Cu(II), Pd(II) and Pt(IV) with horaophthalic acid (hpH₂) and nitrogen-containing heterocyclic bases have been prepared and characterized by elemental analyses, conductometric, magnetic, infrared, and electronic spectral studies. The complexes have the compositions (M(hp).L] and [pt(hp)₂.L] (M-Cu(II) or Pd(II); L=2-arainopy-ridine (2-Apy), 3-aminopyridine (3-Apy), 2,2′-bipyridine (Bipy), 1,10-phenanthroline (Phen) or 2,2′-biquinoline (Biq); hp = dianion of homophthalic acid), respectively. A proposed square-planar structure for the Cu(II) and Pd(II) complexes and octahedral structure for the Pt(IV) complexes are supported by magnetic and spectral data.