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Synthesis of Ethers

Give the decr...

Question

Give the decreasing order of reactivity of the following alkyl halides in the Williamson' s reaction.
i. ${(C H_{3})}_{3} C - C H_{2} B r$
ii. $C l C H_{2} C H = C H_{2}$
iii. $C l C H_{2} C H_{2} C H_{3}$
iv. $B r C H_{2} C H_{2} C H_{3}$

ii > iv > iii > i

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i > iii > iv > ii

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ii > iii > iv > i

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i > iv > iii > ii

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Solution

The correct option is A ii > iv > iii > i
ii > iv > iii > i (ally chloride > $R X = 1^{\circ} R B r > 1^{\circ} >$ neopentyl bromide. (R-Br) bond is weaker than (R-CI) bond. $S N^{2}$ reaction is faster with (R-Br) than with (R-CI).

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Similar questions

i . {(C H_{3})}_{3} C - C H_{2} B r

i i . C l C H_{2} C H = C H_{2}

i i i . C l C H_{2} C H_{2} C H_{3}

i v . B r C H_{2} C H_{2} C H_{3}

50^{\circ}

R - C H = C H_{2},

M e

E t

M e_{2} C H

M e_{3} C

i . B C l_{3}

i i . A l C l_{3}

i i i . G a C l_{3}

i v . I n C l_{3}

M e_{3} C C H_{2} B r

C H_{3} C H_{2} C H_{2} B r

C H_{2} = C H C H_{2} C l

C H_{3} C H_{2} C H_{2} C l

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