“Synthesis of thiophosphoramide and phosphoramide ligands and reactivity studies with metal ions”

Abstract

Various phoshoramide and thiophosphoramide ligands containing hard and soft donor functionalities were synthesized and their reactivity studies were carried out with various transition metal ions. Using tris(alkylamido) functionalized thiophosphoramide ligands, interesting examples of Ag(I), Cd(II) and Pd(II) complexes were synthesized. Further, some of these complexes were used as single-source precursors for stabilizing the corresponding metal-sulfide nano-particles such as Ag2S and CdS nano-particles. These nano-particles were found to be stabilized by the thio-functionalities of the phosphoramide ligands. In another related system using the t-butyl phosphoric diamide ligand containing 3-pyridyl functionalities, interesting examples of metal complexes were obtained as discrete and polymeric assemblies. The Cu(II) complexes of this ligand were obtained as 1D- and 2D-polymeric complexes depending upon the counter ions, While a discrete trinuclear macrocyclic structure cage was obtained for the Ni(II) ions.