CHEMISTRY OF DIORGANODITHIOPHOSPHATE (AND PHOSPHINATE) DERIVATIVES WITH ARSENIC, ANTIMONY AND BISMUTH

Dialkyldithiophosphates, alkylenedithiophosphates (and dialkyldithioph osphinates) are versatile ligands and exhibit remarkable diversity in their coordination patterns with transition and non-transition metals including arsenic, antimony and bismuth. Their derivatives with these metals have also found applications in a number of ways such as analyt ical reagents, lubricant additives, regeneration of cracking catalysts and antitumour agents. In view of the above, a brief review article i s being presented on synthetic and structural aspects of dialkyldithio phosphate, alkylenedithiophosphate and dialkyldithiophosphinate deriva tives of arsenic, antimony and bismuth and their organometallic moieti es. Starting with a brief introduction and synthesis of ligands, the s ynthesis of various diorganodithiophosphate (and dialkyldithiophosphin ate) derivatives with arsenic, antimony and bismuth and their correspo nding organometallic moieties and mixed derivatives as well as their p roperties and reactions have been described. The structural features h ave been discussed with the help of spectroscopic (IR, NMR and mass) s tudies. X-ray single crystal structures of a number of tris as well as organometallic derivatives have also been reviewed explaining various types (monodentate, iso and anise bidentate and tricoordinate-mixed b ridging and chelating) of behaviour of the ligands and stereochemistry of the complexes considering various factors such as the presence of the stereochemically active lone pair, small ligand bite and molecular associations. (C) 1998 Elsevier Science S.A.