Synthesis, characterization and electrochemical behaviour of some manganese and copper complexes with tetradentate Schiff base ligands

Article abstract of DOI:10.1080/00945719909349505

A series of symmetrical tetradentate Schiff bases derived from substituted salicylaldehyde and ethylenediamine were prepared and characterized by elemental analysis, IR, UV-Visible and ¹H NMR spectroscopy. The interaction of these bases with MnCl₂ 4H₂O and CuCl₂.4H₂O have been studied, leading to the preparation of manganese(II) and copper(II) complexes Microanalysis, molar conductance, IR, UV-Visible spectroscopy, magnetic measurements and ESR spectra have been used to elucidate the stucture of the resultant complexes The experimental data show that all the Schiff base ligands N,N′-bis(2-hydroxybenzyl)ethylenediimine (H₂L¹), N,N′-bis(2-hydroxyacetophenyl)ethylenediimine (H₂L²) and N,N′-bis(2-hydroxypropiophenyl)ethylenediimine (H₂L³) yield 1:1 compounds except for the ligand H₂L² which gave a 2:1 compound with manganese(II). The spectral studies support the binding of the ligands with two N and two O donor sites to the metal(II) ion, giving an arrangement of N₂O₂ donor groups Magnetic and ESR data indicate that the manganese(II) adopts a high spin configuration in the complexes studied and the covalent character of the metal-ligand bonding in the copper(II) complexes increases with the increasing electron donating effect of the ligand substituents R The electrochemical behaviour of the manganese(II) and the copper(II) complexes was determined by cyclic voltammetry which shows that the chelate structure and electron donating effects of the ligand substituents are among the factors influencing the redox potentials of the complexes.

Full text of DOI:10.1080/00945719909349505

Synthesis and Reactivity in Inorganic and Metal-Organic
Chemistry
ISSN: 0094-5714 (Print) 1532-2440 (Online) Journal homepage: http://www.tandfonline.com/loi/lsrt19
Synthesis, Characterization and Electrochemical
Behaviour of Some Manganese and Copper
Complexes with Tetradentate Schiff Base Ligands
N. Tidjani-Rahmouni , S. Djebbar-Sid , N. Chenah & O. Benali-Baitich
To cite this article: N. Tidjani-Rahmouni , S. Djebbar-Sid , N. Chenah & O. Benali-Baitich (1999)
Synthesis, Characterization and Electrochemical Behaviour of Some Manganese and Copper
Complexes with Tetradentate Schiff Base Ligands, Synthesis and Reactivity in Inorganic and
Metal-Organic Chemistry, 29:6, 979-994, DOI: 10.1080/00945719909349505
To link to this article: http://dx.doi.org/10.1080/00945719909349505
Published online: 14 Apr 2008.
Submit your article to this journal
Article views: 42
View related articles
Full Terms & Conditions of access and use can be found at
http://www.tandfonline.com/action/journalInformation?journalCode=lsrt20
Download by: [University of York]
Date: 18 February 2016, At: 10:02