Mechanism in replacement

It is difficult to distinguish a D from an Ij mechanism in replacements of coordinated solvent with the entering ligand, L. For instance, in replacement of water of an aqua complex by L, both mechanisms, D and Ij, will yield a linear dependence of the reaction rate on the concentration of L. Thus, if replacement of water by L in the reaction M-H20 + L proceeds by a D mechanism, then the following equation must hold ... 

---