Synthesis and Characterization of some Metal Ion Complexes with 8-Acetyl-7-hydroxy-4-methylcoumarin-4-chloro/nitroaniline

Inorganic Research Laboratories, Department of Chemistry, Dr. H. S. Gour University, Sagar-470 003

Manuscript received 9 June 1997, revised 20 August 1997, accepted 29 August 1997

The Schiff base compounds of 8-acetyl-7-hydroxy-4-methylcoumarin with substituted aromatic amines, viz. 4-chloroaniline and 4- nitroaniline have been synthesized and their metal complexes with Cu^II, Ni^II and Co^II have been prepared. The Schiff bases function as bidentate anionic ligands chelating through deprotonated phenolic oxygen and azomethine nitrogen. The ligand field parameters of the complexes have been evaluated.