Grubbs Catalyst is a type of chemical catalyst used in organic chemistry, particularly for a process called olefin metathesis. Developed by Robert H. Grubbs, this catalyst helps in the rearrangement of carbon-carbon double bonds, allowing for the formation of new compounds. It is widely used in the synthesis of pharmaceuticals, polymers, and other complex molecules. The catalyst is known for its efficiency and versatility, making it a valuable tool in both academic and industrial settings. Grubbs Catalyst comes in several forms, including first, second, and third generation variants, each with improved properties for specific applications in chemical reactions.