arylethylene

An arylethylene is an organic compound characterized by an aromatic ring directly attached to an ethylene group. The general formula for arylethylene is Ar-CH=CH2, where Ar represents an aryl group, most commonly a phenyl group. Styrene (phenylethylene) is the most well-known example of an arylethylene. These compounds are important monomers in the production of polymers.

The presence of the aromatic ring influences the reactivity of the double bond, making it susceptible to polymerization reactions. This polymerization can occur through various mechanisms, including free radical, cationic, and anionic polymerization. The aryl group also imparts specific properties to the resulting polymers, such as rigidity, thermal stability, and optical clarity.

Arylethylenes are synthesized through several methods. A common industrial route for styrene production involves the dehydrogenation of ethylbenzene. Other methods may include Wittig reactions or elimination reactions from appropriate precursors. The properties and applications of arylethylenes are largely dictated by the specific aryl group and any substituents present on the ring or the ethylene moiety. Beyond styrene, other substituted arylethylenes find use in specialized polymer applications and as intermediates in organic synthesis.