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Question
Halogenation of halo arenes follows which of the following mechanism?
Halogenation of halo arenes follows which of the following mechanism?
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Solution
The correct option is B Electrophillic substitution
The reactions of haloarenes take place when haloarene reacts with chlorine in the presence of a solvent (say ferric chloride). The chlorine molecule tends to become polar in nature and develops a slightly positive charge. Thus, the chlorine acts as an electrophile and will attack the electron-rich Ortho and Para position of the compound.
The reaction will result in the formation of both Ortho and Para compounds. However, Para isomer will be the major product and Ortho isomer will be the minor product of the reaction. In the above example chlorobenzene reacts in the presence of Lewis acid and form ortho and para substitutes of dihalobenzenes.
The reactions of haloarenes take place when haloarene reacts with chlorine in the presence of a solvent (say ferric chloride). The chlorine molecule tends to become polar in nature and develops a slightly positive charge. Thus, the chlorine acts as an electrophile and will attack the electron-rich Ortho and Para position of the compound.
The reaction will result in the formation of both Ortho and Para compounds. However, Para isomer will be the major product and Ortho isomer will be the minor product of the reaction. In the above example chlorobenzene reacts in the presence of Lewis acid and form ortho and para substitutes of dihalobenzenes.
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