COBALT(II), NICKEL(II) AND COPPER(II) COMPLEXES OF ETHYL-1-PHENYL-5-OXO-3-PYRAZOLIN-4-YL)-N--ACRYLOYL THIOUREA AND ITS HOMOPOLYMER

The cobalt(II), nickel(II) and copper(II) complexes of the monomeric H L1 and polymeric (HL2)n ligands of ethyl-1-phenyl-5-OxO-3-pyrozolin-4- yl)-N'-acryloyl thiourea are described. The reactions of nickel(II) an d Copper(II) acetate (1 mole) with HL1 (1 mole) produce 1:1 metal comp lexes. Cobalt(II) acetate (1 mole reacts with HL1 (1 mole) to yield Co (HL1)2(OOCMe)2. (H-2)n (1 mole) reacts with cobalt(II) and nikle(II) a cetates (1 mole) to produce complexes in which each metal ion coordina tes with two ligating groups, whereas with copper(H) acetate produce a complex in which each copper ion coordinates with one ligating centre . The monomeric ligand and each ligating group in the polymeric ligand behaves as monobasic or neutral bidentate ligands. The complexes were characterized by elemental analysis, conductance measurements, and 1R ., and electronic spectra as well as magnetic susceptibility measureme nts and DTA analysis.