MIXED-LIGAND COMPLEXES OF CR(III), FE(III) AND RU(III) DIPHENATES WITH HETEROCYCLIC BASES

Several new mixed ligand complexes of chromium(III), iron(III and ruthenium(III) with diphenic acid (DAH2) and nitrogen-containing heterocyclic bases have been prepared. The complexes have the compositions K[M(DA)2.L2], K[M(DA)2.L'] and K2[M(DA)2 (OX)], where M = Cr(III), Fe(III) or Ru(III); DA = dianion of diphenic acid; L = quinoline (Q), isoquinoline (IQ), pyridine (Py), 2-picoline (2-Pic) or 4-picoline (4-Pic); L' = 2-aminopyridine (2-Apy), 3-aminopyridine (3-Apy), 2,2'-bipyridine (Bipy) or 1, 10-phenanthroline (Phen); OX = anion of 8-hydroxyquinoline. The complexes were characterised on the basis of elemental analyses, conductivity measurements, magnetic measurements, infra-red and electronic spectral studies. All the complexes were found to be octahedral.