ISSN 2329-9843
Full Length Research Paper
Preparation, characterization and kinetic study of metal complexes derived from N5 acyclic ligand
Omar Hamad Shehab AL- Obaidi, Taghreed M.Musa, Mahmod N.Al-jibouri
*Chemistry department, Women Education College, Al-Anbar University, Iraq.
*Chemistry department, College of science, Al-Mustansrya University, Iraq.
*Corresponding author. E-mail: dromaralobaidi@yahoo.com
Accepted 15 July, 2013.
Abstract
The complexes of a new pentadentate acyclic ligand derived from 1,2-diamino benzene and 2,6-diacetylpyridine with vanadium(IV), Cr(III), Mn(II), Fe(III), Co(II), Ni(II), and Cu(II) have been synthesized. Metal to ligand ratio in all complexes has been found to be 1:1. The polydentate ligand behaves as N5 system upon linkage with Cr (III), Fe (III), Mn(II), Co(II), and Cu(II) ions. All the complexes have been assigned octahedral stereo chemistry, while VO (IV) complex was square pyramid. The thermodynamic parameters such as ∆G*, ∆H* and ∆S* are calculated from the curve of logKs verse temperature. It is found that Ni (Π) and Cu (II) are the most stable complexes from the data of formation constant and Gibbs free energy.
Key words: Preparation, characterization, kinetic study, metal complexes, acyclic ligand.