Research Information System
TRANSITION METAL CHEMISTRY, vol.25, no.4, pp.474-477, 2000 (SCI-Expanded)
A new soluble vic-dioxime ligand namely 1,4-bis(2'-hydroxyethyl)-2,3-bis(hydroxyimino)-5,6-diphenylpiperazine, (LH2) containing optically active centers has been prepared as a mixture of isomers from (CNO)(2) and N,N-bis(2-hydroxyethyl)stilbendiamine (1) which has been made by the reduction of the condensation of the product of benzaldehyde and 2-aminoethanol in the presence of aluminum amalgam. N,N-coordinated planar metal complexes of this ligand have been synthesized with Ni-II, Cu-II, Co-II, Pd-II and (UO2)-O-VI. Oxidation of (LH)(2)Co in the presence of a base, such as pyridine, leads to an octahedral complex (LH)(2)CopyCl containing pyridine and chloride as axial ligands in addition to vic-dioxime ligands. The structures of the ligand and its complexes are proposed on the basis of elemental analysis, H-1-n.m.r., mass, i.r. and u.v.-vis. spectral data.