A. Ourari, K. Ouari, Wahiba Moumeni
Mar 1, 2006
Citations
0
Influential Citations
32
Citations
Journal
Transition Metal Chemistry
Abstract
Salicylaldehyde or 5-bromosalicylaldehyde reacted with 2,3-diaminophenol in absolute EtOH in a 2:1 molar ratio to give new unsymmetrical Schiff bases (H2L). The bases were used as ligands to coordinate Mn(III), Ni(II) and Cu(II) chlorides leading to [MnIIIClL] · EtOH and [MIIL] or [MIIL] · 2H2O (M = Ni or Cu) complexes. Their structures were determined using mass spectroscopy, IR, u.v.–vis and 1H-n.m.r. The cyclic voltammetry in acetonitrile showed irreversible waves for both ligands. Under the same experimental conditions, the complexes exhibited mainly the non-reversible reduction of the Ni(II) or Cu(II) ion to Ni(0) or Cu(0), while the reduction of Mn(III) to Mn(II) was found to be a quite reversible phenomenon.