The primary ligands have a formula (Ri)3 -A: wherein A represents P,As, or N. In this formulation, i represents an integer from 1-4 corresponding to the sub-numeral for the respective ligands L. R1 -R4 independently represents the same or different radical including hydrogen, C1- C20 alkyl which is intended to include substituted and unsubstituted alkyl, oxy alkyl (C1 -C10) (i.e., --O--CH3), cyclo