Synthesis and characterization of novel (E,E)-dioxime and its mono- and heterotrinuclear complexes


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GOK Y., Kantekin H.

ACTA CHEMICA SCANDINAVICA, cilt.51, ss.664-671, 1997 (SCI İndekslerine Giren Dergi) identifier identifier

Özet

A novel (E,E)-dioxime 5,6: 13,14-dibenzo-9,10-benzo(15-crown-5)-2,3 -bis(hydroxyimino)-1,4,8,11-tetraazacyclotetradecane (H2L) was synthesized by the reaction of (E,E)-dichloroglyoxime (5) with 2,3:10,11-dibenzo-6,7-benzo(15-crown-5)-1,5,8, 12-tetraazadodecane (4) obtained from the reduction of 1,2-bis(o-nitrobenzylidenimino)benzo(15-crown-5) (3). Only mononuclear cobalt(III) and ruthenium(II) complexes with a metal/ligand ratio of 1:2 were isolated then cobalt(III) complexes bridged with BF2+ were obtained with hydrogen-bridged cobalt(III) complex and boron trifluoride etherate. The reaction of BF2+-capped mononuclear cobalt(III) complex with [Cu(CH3CN)(4)]PF6 gave a heterotrinuclear complex, The alkali metal binding ability of the mononuclear cobalt(III) complex was also studied. The structure of the dioxime and its transition-metal complexes are proposed according to elemental analyses, H-1 and C-13 NMR, IR and mass spectra.