M.Sc.

     The oxidation-reduction behavior of the newly prepared choline chloride/d-tartaric acid ionic liquid was studied by electrolysis at 25°C to 95°C with applied voltages of 0.5 to 5 volts. This ionic liquid was found stable up to 45°C and 5 volts as only showed small changes in current density. But, at 65°C the liquid showed noticeable unstable behavior particularly at or above 2.5 volt, which increased at higher temperature with increase conducting too.

There are several ways for preparing Schiff bases. The most common way is the condensation reaction between amines and aldehydes.The Schiff bases were prepared by the reaction of cyclohexylamine with piperonaldehyde and reaction of 2,4-dichloroaniline with salicylaldehyde with mole ratio 1:1 to prepare ligand [L_A] (Piperonaldehyde cyclohexylimine) and ligand [L_B] (Salicylidene-2,4-dichloroaniline) respectively.

Investigation of some transition metal complexes were carried out at room temperature in the new clan of room temperature ionic liquids of choline chloride based composition The Ultraviolet Visible Spectroscopic spectra of Cr3+, Fe3+, Co2+, Ni2+ and Cu2 indicated a complexes formation between the metal ions and the entities of these types of RTILs solvents namely choline chloride/ urea and choline chloride malonic acid which have freezing point at 12o C and 0oC respectively The complexes in choline chloride/ urea were found to be of Octahedral geometry for Cr3+,