JEE 2017 – Frequently Asked Questions from Free Radical ReactionAccording to JEE syllabus, free radical reactions cover a wide range of reactions in organic chemistry. Having a good understanding of the mechanism of free radical reactions helps you understand a majority of reactions in organic chemistry. Some FAQs related to free radical reactions are underlined below:
What is a Free Radical Reaction?Free radical reactions in organic chemistry are defined as the reactions involving free radicals obtained from homolysis or homolytic cleavage. In such reactions, each bonding partner receives an equal number of electrons. A general free radical reaction involving homolysis can be given as:
What is the general mechanism for free radical reactions?JEE syllabus involves wide range of free radical reactions. One of these reactions is anti-Markovnikov addition. A general chemical reaction and its mechanism are underlined below:
Mechanism of anti-Markovnikov addition: Reaction proceeds in several steps involving:
- Generation of free radical through homolytic cleavage.
- Attack of generated free radical on the hydrogen halide to generate halide radical through homolysis.
- Attack of generated halide radical on alkene molecule to generate alkyl radical through homolysis.
- Attack of generated alkyl radical on hydrogen halide to form alkyl halide through homolytic cleavage of hydrogen halide bond.