The Heck Reaction is a chemical process that allows for the coupling of alkenes with aryl halides, typically using a palladium catalyst. This reaction is significant in organic chemistry for forming carbon-carbon bonds, which are essential in synthesizing complex molecules, including pharmaceuticals and agrochemicals. In the Heck Reaction, the palladium catalyst facilitates the insertion of the alkene into the carbon-halogen bond of the aryl halide. This results in the formation of a new carbon-carbon bond, producing substituted alkenes. The reaction is valued for its efficiency and versatility in creating diverse organic compounds.