ESR, MAGNETIC an‎d THERMAL INVESTIGATIONS OF BINARY Cu(II) an‎d VO (II) CHELATES DERIVED FROM OXIMES INVOLVING HETEROCYCLIC beta-DIKETONES

Binary copper(II) and oxovanadium (IV) complexes with a bidentate mononegative NO donor Schiff baseligand 4-acyloxime-1-phenyl-3-methyl-2-pyrazoline-5-one, where acyloxime = acetyloxime, propyloximeand butyryloxime. Microanalytical data, magnetic susceptibility (300 °K), molar conductance,thermogravimetric analysis, reflectance, FT–IR, Uv–visible, 1H–NMR and ESR spectral study were usedto confirm the structure of the compounds. Electronic absorption and FT–IR spectra of the copper(II) andoxovanadium(IV) complexes suggest square planar and square pyramidal geometry respectively. The ESRspectra recorded in mixed solvent 40:60 (toluene–pyridine) at 77 °K and 300 °K from that the bondingparameters are calculated. TGA was used to find out the stability of complexes.