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Question
Why are haloalkanes more reactive towards nucleophilic substitution reactions than haloarenes and vinylic halides?
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Solution
Haloalkanes are more reactive than haloarenes and vinylic halides because of the presence of a partial double bond character C-X bond in haloarenes and vinylic halides. Hence they do not undergo nucleophilic reactions easily.
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RELATED QUESTIONS
Draw the structure of the major monohalo product in the following reaction:
Which of the following compounds can be classified as aryl halides?
(i) \[\ce{p-ClC6H4CH2CH(CH3)2}\]
(ii) \[\ce{p-CH3CHCl(C6H4)CH2CH3}\]
(iii) \[\ce{o-BrH2C - C6H4CH(CH3)CH2CH3}\]
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| Column I | Column II | |
| (i) | \[\begin{array}{cc} \ce{CH3 - CH - CH3}\\ |\phantom{..}\\ \ce{X}\phantom{..} \end{array}\] |
(a) Aryl halide |
| (ii) | \[\ce{CH2 = CH - CH2 - X}\] | (b) Alkyl halide |
| (iii) |  |
(c) Vinyl halide |
| (iv) | \[\ce{CH2 = CH - X}\] | (d) Allyl halide |
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1-Bromobut-2-ene
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