Answer
Olefin and aryl halide are the two primary components involved in Richard F. Heck's initial reaction discovery. This reaction, known as the Heck reaction, is a palladium-catalyzed carbon-carbon bond-forming reaction that involves the coupling of an aryl or vinyl halide with an alkene or alkyne. The versatility of this reaction lies in its ability to form various carbon-carbon bonds, making it a valuable tool in organic synthesis.