Title of article :
SYNTHESIS and SOLUTION COMPLEXATION STUDIES OF A NEW SCHIFF BASE LIGAND
Author/Authors :
payeghadr, mahmood payame noor university of tehran - department of chemistry , nourifard, farzaneh payame noor university of tehran - department of chemistry , kalhor, mehdi payame noor university of tehran - department of chemistry , shahoei, chiman payame noor university of tehran - department of chemistry
Abstract :
A new Schiff base ligand, 2, 2'-{pyridine-2, 6-diylbis [nitrile (E) methylylidene]} bis (4 bromophenol), has been synthesized by reaction of the 2, 6-diamino pyridine with 5- bromo salicylaldehyde at ethanol under refluxing. The structure of the synthesized compound resulted from the IR, 1HNMR, MS and UV spectroscopy and elemental analysis data. Formation Constant (kf) value of it’s complexes with Cu2+, Ni2+, Cd2+, Co2+ and Hg2+ has been determined Conductometrically. The formation constants of the resulting 1:1 complexes have been calculated from the computer fitting of the molar conductance - mole ratio data at different temperatures. The stability of the complexes to vary in acetonitrile solvent was in the order of Cu2+>Cd2+>Co2+>Hg2+>Ni2+. The enthalpy and entropy changes of the complexation reactions have been evaluated from the temperature dependence of formation constants.
Keywords :
CONDUCTOMETRY , COMPLEXATION , FORMATION CONSTANT , SYNTHESIS , SCHIFF BASE , LIGAND
Journal title :
Astroparticle Physics
