Haloalkanes and Haloarenes - Result Question 8
####8. Which one is a nucleophilic substitution reaction among the following?
[2011]
(a)
(b) $RCHO+R^{\prime} MgX \longrightarrow OH$
(c)
(d) $CH_3 CHO+HCN \longrightarrow CH_3 CH(OH) CN$
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Solution:
- (c) Nucleophilic substitution reactions are the most common reactions of alkyl halides.
Because of high electronegativities of the halogen atom, the carbon halogen $(C-X)$ is highly polarised covalent bond. Thus, the carbon atom of the $C-X$ bond becomes a good site for attack by nucleophiles (electron rich species).
