SYNTHESIS AND CHARACTERIZATION OF NEW (E,E)-DIOXIMES AND THEIR BF2-CAPPED MONONUCLEAR AND TRINUCLEAR COMPLEXES WITH NI(II), PD(II) AND CO(III)()

Two novel (E, E)-dioximes, )-1,4-dithia-7,12-dioxo-8,11-diazacyclotetr adecane (H(2)L(2)), which contains crown ether group, and )-1,4-dithia -7,12-dioxo-8,11-diazacyclotetradecane (H(2)L(1)), have been synthesiz ed by the reaction of S',S'-bis(2-carbomethoxypheny)dithioglyoxime 1 w ith 4',5'-diaminobenzo(15-crown-5) or 1,2-diaminobenzene, respectively , Only mononuclear Ni(II) and Co(III) complexes with a metal/ligand ra tio of 1,2 have been isolated, Cobalt (III) complexes bridged with BF2 + are obtained with hydrogen-bridged Co(III) complexes and borontriflu oride ethyl ether complex, The reaction of BF2+-capped mononuclear Co( III) complexes with bis(benzonitrile)palladium(II)chloride give hetero trinuclear complexes. The structures of the dioximes and their complex es are proposed according to elemental analyses, H-1- and C-13{H-1}-NM R, IR and mass spectra.