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Boiling Point of Carboxylic Acids

In the given ...

Question

In the given pairs, which pair represent correct order of rate of dehydrohalogenation reaction?

C H_{3} - C H_{2} - C H_{2} - C H_{2} (C l) < C H_{3} - C H_{2} - C H (C l) - C H_{3}

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C H_{2} = C H - C H_{2} - C H_{2} C l < C H_{3} - C H_{2} - C H (C l) - C H_{3}

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C H_{3} - C H_{2} - C H (I) - C H_{3} < C H_{3} - C H_{2} - C H (B r) - C H_{3}

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C H_{3} - C H_{2} - C l < C D_{3} - C D_{2} - C l

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Solution

The correct option is A $C H_{3} - C H_{2} - C H_{2} - C H_{2} (C l) < C H_{3} - C H_{2} - C H (C l) - C H_{3}$
In the given pairs, the pair that represent correct order of rate of dehydrohalogenation reaction is $C H_{3} - C H_{2} - C H_{2} - C H_{2} (C l) < C H_{3} - C H_{2} - C H (C l) - C H_{3}$ .
The rate of dehydrohalogenation reaction for primary alkyl halide is lower than the rate of dehydrohalogenation reaction for secondary alkyl halide. This is because, secondary carbocation is more stable than primary carbocation.
Hence, option A is the correct answer.

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Similar questions

S_{N} 2

K I

C H_{3} - C H_{2} - C H_{2} - C H_{2} - C l a n d C H_{3} - C H ∣ C H_{3} - C H_{2} - C l

(I) (I I)

C H_{3} - C H_{2} - C H_{2} - C l a n d C H_{3} - C H_{2} - C H_{2} - B r

(I) (I I)

C H_{3} - C H ∣ C H_{3} - C H_{2} - C H_{2} - C l a n d C H_{3} - C H_{3} ∣ C ∣ C H_{3} - C H_{2} C l

(I) (I I)

C H_{3} - C H_{2} - C H_{2} - B r ∣ C H - C H_{3} a n d C H_{3} - C H_{3} ∣ C H - C H_{2} - B r ∣ C H - C H_{3}

(I) (I I)

H_{2} C = C H - C H_{3} + H C l \to

C H_{3} - C H_{2} - C H_{3} | C | C H_{3} - C H_{2} C l

C H_{2} = C H C l

A . C H_{3} - C H = C H_{2} + H C l ⟶ C H_{3} - C | C l H - C H_{3}

B . C H_{3} - C H = C H_{2} + H B r ⟶ C H_{3} - C H_{2} - C H_{2} B r

C . C H_{3} - C H = C H_{2} + H B r p e r o x i d e - ---- \to C H_{3} - C H_{2} - C H_{2} - B r

D . C H_{3} - C H = C H_{2} + H I p e r o x i d e - ---- \to C H_{3} - C | I H - C H_{3}

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