The mechanism usually involves the following steps:
1. Coordination: The alkene coordinates to the metal center, forming a π-complex. 2. Activation: The coordinated alkene is activated by the metal, making it more reactive. 3. Transformation: The activated alkene undergoes the desired chemical transformation (e.g., hydrogenation, polymerization). 4. Release: The product is released from the metal center, regenerating the catalyst for another cycle.