Synthesis and characterization of a new (E,E)-dioxime and its mono and polynuclear complexes containing a 14-membered dithiadiaza macrocyclic moiety


BILGIN A., ERTEM B., GOK Y., Dilber G., KILICARSLAN M.

Journal of Coordination Chemistry, vol.57, no.10, pp.883-891, 2004 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 57 Issue: 10
  • Publication Date: 2004
  • Doi Number: 10.1080/0092897041000172005
  • Journal Name: Journal of Coordination Chemistry
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.883-891
  • Keywords: (E,E)-Dioxime, [UO2]2+, Cu(I), Heteropentanuclear complex, Heterotrinuclear complex, N2S2-Donor macrocycle, Ni(II)
  • Karadeniz Technical University Affiliated: Yes

Abstract

A novel (E,E)-dioxime,5,6:13,14-di(4′-t-butylbenzo)-2,3- bis(hydroxyimino)-8,11-dithia-1,4-diazacyclotetradecane (H2L), containing a 14-membered dithiadiaza macrocyclic unit has been synthesized by the reaction of 1,2-bis(4-t-butyl-2-aminobenzylthio)ethane (1) and cyanogendi-N-oxide (2). A mononuclear nickel(II) complex (3) with a metal:ligand ratio of 1:2 was also prepared. A heterotrinuclear complex [Cu 2Ni(HL)2](PF6)2 (4) was synthesized by using the mononuclear complex 3 and [Cu(CH3CN)4]PF6. A heteropentanuclear complex [Cu2(UO2)2(phen) 2Ni(HL)2](PF6)2(NO3) 2 (5) containing the oximato tetraanion as a bridging ligand and 1,10-phenanthroline as an end-capping ligand was obtained by using the heterotrinuclear ligand for the Cu2Ni(HL)2n+ center. The ligand and its complexes have been characterized by 1H and 13C NMR, IR and mass spectroscopy, elemental analysis and semiempirical quantum chemical calculations.