The carbon-carbon triple bond in phenylacetylene and the double bond in the benzene ring can form a conjugated system with certain stability. At the same time, the conjugation system also makes phenylacetylene have a strong affinity for electrons and is prone to various substituted Chemicalbook reactions. Because it contains triple bonds and unsaturated carbon-carbon double bonds, the reactivity of phenylacetylene is very strong, and phenylacetylene can undergo addition reactions with hydrogen, halogens, water, etc. to generate corresponding products.