CHROMIUM(III) COMPLEXES OF 1,2-DI(IMINO-4′-ANTI PYRINYL)ETHANE

ABSTRACT

Chromium(III) complexes of the Schiff base 1,2-di(imino-4′-antipyrinyl)ethane (GA) have been synthesized and characterized by elemental analyses, electrical conductance in non-aqueous solvents, infrared and electronic spectra as well as magnetic susceptibility measurements. The complexes have the general formulae [Cr(GA)(ClO₄)](ClO₄)₂ and [Cr(GA)-X₂]X (X=NO₃, Cl or Br). In the complexes, GA acts as a neutral tetradentate ligand coordinating through both carbonyl oxygens and both azomethine nitrogens. In the perchlorate complex one of the anions is coordinated in a bidentate fashion while in the corresponding nitrate and halide complexes two of the anions are coordinated to the metal ion. A distorted octahedral geometry is assigned around the Cr(III) ion in all of these complexes.

ACKNOWLEDGMENTS

We thank the Head, Regional Sophisticated Instrumentation Centre, Indian Institute of Technology, Chennai, for providing the experimental facilities for this work. We also thank the authorities of the University Grants Commission, New Delhi, India, for granting a Teacher Fellowship to one of us (VTT).