College of Science

          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.

   This thesis falls into three main chapters. Chapter I deals with a general survey of literature which discusses an introduction for chromium and vanadium (discovery, valances, uses, availability and toxic effects);also it includes the different techniques used for there determination.Focus was made on the determination of chromium and vanadium ions using spectrophotometric method in various different biological,industrial, drinking and sewage water samples.

 The chemistry of Palladuim and Copper is briefly reviewed, with emphasis on their +2 oxidation state, unique properties and structures of their complexes, beside the basic aspects of bonding, structure and geometrical aspected of metal complexation. The structure and bonding chemistry relevant to the use of dithiooxamide in metal complex synthysis is discussed and related to the questions posed in this