The mechanism by which catalytic complexes operate involves the coordination of reactants to the central metal ion, which then facilitates the breaking and forming of chemical bonds. This process can be broken down into several steps: 1. Adsorption: Reactants are adsorbed onto the surface or coordinated to the metal center. 2. Activation: The catalytic complex activates the reactants by altering their electronic structure. 3. Reaction: The activated reactants undergo the desired chemical transformation. 4. Desorption: The products are released from the catalytic complex, regenerating the catalyst.