The Hammond Postulate is a concept that relates the structure of the transition state to the structures of the reactants and products. It states that the transition state will resemble the species (reactants or products) to which it is more similar in energy. For exothermic reactions, the transition state resembles the reactants, while for endothermic reactions, it resembles the products. This postulate helps in understanding and predicting the nature of the transition state.
