New six coordinate cobalt(III) complexes of [1,2-diaminoethane –N,Ń-bis (2-butylidine -3-onedioxime)]

Abstract

The ligand [1,2-diaminoethane –N,Ń-bis (2-butylidine -3-onedioxime)][H2L]. was reacted
with Co(NO3)2.6H2O and KBr in ethanol with reflux in (1:1) metal : ligand ratio to give a
new complex of the general formula [CoIII(HL)Br2]. A series of new complexes with some
heterocyclic nitrogen and aliphatic amine ligands of the general formula [CoIII(HL)(X)Br]Br
(where: X=pyridine, 4-picoline, and 3-picoline, piperidine, octylamine, n-propylamine and
Br) were prepared. All compounds have been characterised by spectroscopic methods [IR,
U.V-Vis, atomic absorption, (1H NMR, and EI-mass spectroscopy for the ligand)],
microanalysis andwith conductivity measurements. From the obtained data, a distorted
octahedral molecular structure about Co(III) ion has been proposed.