Chemistry - Sciene

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+,

       Choline chloride / tartaric acid room temperature ionic liquid was prepared and the obtained phase diagrams of the mixture showed eutectic point at 5 ^oc. The ionic liquid showed a conductive properties, high density and low PH values. Secondly, the dissolution of Co₃O₄, CrO₃, NiO, CuO, and ZnO. Were studied and found   soluble in choline chloride / tartaric acid ionic liquid as their solubilities were determined by measuring the dissolved metal by atomic absorption from room temperature up to 100 ^oc.

          Chromium (III) complexes were prepared from sulphur containing ligands; Potassium alkyl xanthate, (PAX), these complexes were:

1- Tris (methylxanthato) chromium (III) complex Cr(mex)₃.

2- Tris (ethylxanthato) chromium (III) complex    Cr(etx)₃..

3- Tris (isopropylxanthato) chromium (III) complex Cr(prx)₃.

4- Tris (butylxanthato) chromium (III) complex   Cr(bux)₃.

5- Tris (hexylxanthato) chromium (III) complex   Cr(hex)₃.