Cadmium(II) Complexes of 1,2-Di(Imino- 4′-Antipyrinyl)Ethane

Cadmium(II) complexes of the Schiff base 1,2-di(imino-4′-antipyrinyl)ethane (GA) having general formulae [Cd(GA)]X₂; (X=NO₃ ⁻, ClO₄ ⁻) and [Cd(GA)X₂]; (X=Cl⁻, Br⁻ or I⁻) have been synthesized and characterized by elemental analysis, electrical conductance in non-aqueous solvents, infrared and electronic spectra as well as thermogravimetric analysis. In all these complexes, GA acts as a neutral tetradentate ligand coordinating through both the carbonyl oxygens and both the azomethine nitrogens. Both the anions are coordinated in the halide complexes while these remain as counter ions in the perchlorate and nitrate complexes. Thermal decomposition behavior of the nitrate complex indicates that it is stable up to 234 °C and undergoes a three-stage decomposition pattern yielding the anhydrous Cadmium(II) oxide as the final residue.

Keywords:

• Cadmium(II) complexes
• 1,2-di(imino-4′-antipyrinyl)ethane

Acknowledgments

The authors are indebted to Mahatma Gandhi University, Kerala, India for providing the laboratory facilities. We also thank to the Heads of Regional Sophisticated Instrumentation Center, IIT, Chennai and Regional Research Laboratory, Trivandrum, Kerala for providing some instrumental facilities. Also, we wish to express our heartfelt thanks to Mr. K. C. Raju, for some helpful discussions.