The equilibrium constants for the ligand dissociation reaction have been determined for...

The equilibrium constants for the ligand dissociation reaction have been determined for a variety of phosphines. (See C. A. Tolman, W. C. Seidel, L. W. Gosser, J. Am. Chem. Soc. , 1974 , 96 , 53). For L = PMe₃, PEt₃, PMePh₂, and PPh₃, arrange these equilibria in order of the expected magnitudes of their equilibrium constants (from largest K to smallest).