Same chapter3 marksDifficulty: Medium
What is meant by an ambident nucleophile? Illustrate with the cyanide ion.
Haloalkanes and Haloarenes
3 marksDifficulty: Medium
Arrange the following in increasing order of reactivity towards SN1 and give the reason: 1-chlorobutane, 2-chlorobutane, 2-chloro-2-methylpropane.
Original Khojo Papers practice question — not from a past board paper.
Answer
1-chlorobutane < 2-chlorobutane < 2-chloro-2-methylpropane. The SN1 rate depends on the stability of the carbocation formed, and stability increases from primary through secondary to tertiary because of the electron-releasing alkyl groups.
No citable source has been recorded for this record. Treat it as practice material, not as fact.
Explanation
For SN2 the order is exactly reversed, because steric hindrance blocks the backside attack.
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