One approach involves a novel arrangement of these atoms into what is commonly referred to as "P,N-ligands." These are commonly configured for purposes of metal chelation within 5-or 6membered rings. However, by forming three P,N-bonds via addition of a secondary amine to PCl3, a new series of "P3N-liands" results. The 3HCl given off is consumed as the salt of the added amine, which is filtered away from the newly generated ligand formed in virtually quantitative yield (Scheme 1).