SYNTHESIS AND CHARACTERIZATION OF NEW (E,E)-DIOXIMES AND THEIR COBALT(III) COMPLEXES CONTAINING CROWN-ETHER MOIETIES


GOK Y.

POLYHEDRON, cilt.13, ss.1793-1800, 1994 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 13 Konu: 11
  • Basım Tarihi: 1994
  • Doi Numarası: 10.1016/s0277-5387(00)80112-6
  • Dergi Adı: POLYHEDRON
  • Sayfa Sayıları: ss.1793-1800

Özet

A novel (E,E)-dioxime {S,S'-bis[2-(N-benzo-15-crown-5)carbonyl]dithioglyoxime (5)} which contains crown ether groups has been synthesized from the reaction of 4'-aminobenzo (15-crown-5) and S,S'-bis(2-carbomethoxyphenyl) dithioglyoxime (3), which has been obtained from methyl thiosalicylate and (E,E)-dichloroglyoxime. The cobalt(III) complexes of (5) have been prepared with L' = pyridine and 4,4'-bipyridine, together with chlorine ions as axial ligands. In addition, the synthesis of a new cobalt complex which contains the bridging BF2+ was achieved with the bis(E, E)-dioxime. The ion extraction properties of BF2+ bridged cobalt(III) complexes towards lithium, sodium and potassium picrate from aqueous solution to dichloromethane have been measured. The structure of dioximes and their complexes are proposed according to elemental analysis, H-1 and C-13-NMR, IR, UV-vis and mass spectra.