Abstract
Metal complexes of dehydroacetic acid hydrazone are synthesized and characterized by physical, chemical, and spectral studies. The ligand behaves as monobasic tetradentate coordinated with the metal ions through C=O, deprotonated phenolic oxygen, and azomethin nitrogen. The characterization data suggests a square planar geometry for Cu(II) complex and an octahedral geometry for all other complexes. The crystal and molecular structure of the [Cu(HL)]Cl.H2O complex has been established by a single crystal maXus. The thermal studies of the complexes showed that the decomposition takes place through four steps.