The Grignard addition is one of those reactions you learn during your first year of Organic chemistry and probably the last you forget when you become a computational chemist. It was Victor Grignard who became one of the earliest Nobel Laureate in Chemistry ever, and I know it took me a while to recognize it as an organometallic reaction. But the Grignard reaction is far from simple and its versatility keeps it as a rich source of study.