1-phenyl-l- cyclohexene is also known as PCH or phenylcyclohexene. It is a cyclic hydrocarbon made composed of a phenyl (C6H5) group linked to the cyclohexene ring. Due to the presence of a double bond between two carbon atoms in the cyclohexene ring, phenylcyclohexene is an unsaturated molecule. It is a member of the category of substances known as arylalkenes, which are double-bonded alkenes that have had an aryl group (in this case, a phenyl group) substituted. There are several ways to make this 1-phenyl-l- cyclohexene, including adding a phenyl group to a cyclohexene derivative or eliminating a cyclohexanol derivative with a strong base.