Concentration versus time graph of the favourable thermodynamic mechanism kinetic study. N: B2nep2:NaOPh adduct. L: fluoroborane ; A: fluorobenze; Z: phosphine; Y: Ni(COD)2. [A]0=0.25M; [Z]0=0.05M; [Y]0=0.0125M; [C]0=0.75; [D]0=0.75.