Alkyl halides are organic compounds that consist of an alkyl group bonded to a halogen atom. The halogens include fluorine, chlorine, bromine, and iodine. These compounds are commonly used in various applications, including solvents, refrigerants, and pharmaceuticals. Their chemical properties are influenced by the type of halogen and the structure of the alkyl group. The reactivity of alkyl halides is primarily due to the polar bond between the carbon and the halogen. This polarity makes them susceptible to nucleophilic substitution and elimination reactions. Alkyl halides can be classified into primary, secondary, and tertiary based on the number of carbon atoms attached to the carbon bearing the halogen.