Oxidative addition

Oxidative addition represents a fundamental and widely utilized reaction in organometallic chemistry. It describes a process where a metal complex, typically a transition metal, adds another chemical species across a previously existing bond. This addition results in a significant change within the metal complex: the metal’s oxidation state increases, indicating it has gained electrons, and its coordination number – the number of ligands directly attached to the metal – also increases by two. Crucially, oxidative addition frequently forms a pivotal step within complex catalytic cycles, particularly those involving reactions like C-H activation and cross-coupling. Understanding this reaction mechanism is essential for designing and controlling a vast array of chemical transformations and materials.