Reaction mechanism of alkanes with halogens is known as;
Correct answer: B. Free radical substitution
- A. Propagation
- B. Free radical substitution
- C. Addition
- D. Elimination
Explanation
Halogenation of alkanes means the substitution of a halogen atom(s) by the removal of one or more hydrogen atoms in the alkane. The mechanism of halogenations occurs in three steps: chain initiation, chain propagation, and chain termination.The order of reactivity of the halogens towards the halogenations reaction of alkanes as follows: F2> Cl2> Br2> I2.The iodination reaction is reversible as follows:CH4+I2βCH3βI+HI.
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About Alkyl Halides
Alkyl halides are named and related to their carbon-halogen structure, polarity and reactivity. The key reactions are nucleophilic substitution by SN1 and SN2 mechanisms and elimination by E1 and E2 mechanisms, including how substrate structure, nucleophile, base, solvent and temperature influence substitution versus elimination.
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