THE SYNTHESIS AND CHARACTERIZATION OF NOVEL DIOXIMES AND THEIR HETERONUCLEAR COMPLEXES CONTAINING CROWN-ETHER MOIETIES

A novel vic-dioxime '-benzylidenamino-benzo-15-crown-5)]dithioglyoxime (6), with crown ether groups has been synthesized from the reaction o f 4'-formylbenzo(15-crown- 5) and S,S'-bis(2-aminophenyl)dithioglyoxim e (4), which has been synthesized from the potassium salt of 2-aminoth iophenol and dichloroglyoxime. Mononuclear complexes with a metal: lig and ratio of 1:2 have been isolated for nickel(II) and cobalt(III). Th e reaction of mononuclear complexes with copper(I) and cadmium(II) giv es heterotrinuclear complexes. The structure of dioximes and their com plexes are proposed according to elemental analyses, H-1 and C-13 NMR, IR, UV-vis and mass spectra.