Halogenated
Halogenation is a process of chemical units, is the process of introducing halogen atoms into organic compounds. The most common is the introduction of halogen atoms into hydrocarbon molecules to form "halocarbons". Since halocarbons are relatively active, they are easily replaced by other atoms or "Base" replacement, so commonly used in the process of organic synthesis of intermediates. The halogenation may also refer to a process in which a halogen atom is introduced into an inorganic compound (e.g., metal). The halogenation pathway and the chemical dose and the nature of its chemical structure, the functional group of the organic compound or the halogenated halogen element are related. Halogen is fluorine, chlorine, bromine, iodine, astatine five elements of the general term, so the halogen is also divided into fluoride, chlorination, bromination and iodization. Iodine is much more expensive than chlorine and bromine, so the most commonly used chemical production is chlorination and bromination. Commonly used chlorinating agents are chlorine or hydrogen chloride. Because the fluorine gas oxidation is too strong, usually the reactants directly oxidative decomposition, so fluoride generally with the corresponding fluoride agent. Halogenated examples of acetylene chloride chlorination, can produce vinyl chloride, PVC to become a plastic raw materials; benzene is chlorinated to generate hexachlorobenzene and so on. Dehalogenation (Dehalogenation) is the reverse reaction of halogenation, that is, from the molecular removal of halogen elements, the most common is dehydrohalogenation reaction. ...