Ochlorostyrene

Ochlorostyrene is a class of organic compounds that are derivatives of styrene, a petrochemical widely used in the production of plastics and synthetic rubber. In ochlorostyrene, one or more hydrogen atoms on the vinyl group of styrene are replaced by chlorine atoms. The most common examples are monochlorostyrene, dichlorostyrene, and trichlorostyrene, each referring to the number of chlorine atoms present. These compounds are synthesized through various chlorination reactions of styrene or its precursors.

Ochlorostyrenes are typically colorless liquids or low-melting solids with a characteristic odor. Their physical and chemical properties, such as boiling point, melting point, and reactivity, vary depending on the degree and position of chlorination. The presence of chlorine atoms influences the electron density of the molecule, affecting its polymerization behavior and its susceptibility to different chemical reactions compared to unsubstituted styrene.

While styrene is a monomer for widely used polymers like polystyrene, ochlorostyrenes can also undergo polymerization. However, the resulting chlorinated polymers often exhibit different properties, such as increased flame retardancy, chemical resistance, or modified mechanical characteristics. These specialized polymers may find applications in niche areas where these specific properties are advantageous. Ochlorostyrenes themselves can also serve as intermediates in the synthesis of other organic chemicals, including pharmaceuticals and agrochemicals, leveraging the reactivity imparted by the chlorine substituents. Due to the presence of chlorine, their environmental fate and potential toxicity are important considerations.