EVERYDAY SCIENCE

Detailed explanation-1: -A radical substitution reaction is a reaction which occurs by a free radical mechanism and results in the substitution of one or more of the atoms or groups present in the substrate by different atoms or groups.

Detailed explanation-2: -When ethane and bromine are mixed and illuminated by ultraviolet light, they react together in a substitution reaction. The incomplete balanced equation for this reaction is shown. C2H6 plus Br2 react to form X plus HBr.

Detailed explanation-3: -Radical reactions are very often initiated by light and are not dependent on polarity of the reaction medium. Halogenation of alkanes is a good example of free radical reaction, esp. the chlorination of methane where chloroform(trichloromethane) and tetrachloromethane are formed.

Detailed explanation-4: -Free Radical Addition Of HBr To Alkenes Leads To “Anti-Markovnikov” Products. As discussed previously, alkenes normally react with HBr to give products of “Markovnikov” addition; the bromine ends up on the most substituted carbon of the alkene, and the hydrogen ends up on the least substituted carbon.