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The increasing order of reactivity of th...

The increasing order of reactivity of the following halides for the `S_(N)1` reaction is
I.`CH_(3)CH(CI)CH_(2)CH_(3)`
`II . CH_(3)CH_(2)CH_(2)Cl`
III. `p. -H_(3)CO-C_(6)H_(4)-CH_(2)Cl`

A

`(III) lt (II) lt (I) `

B

`(II) lt (I) lt (III)`

C

`(I) lt (III) lt (II)`

D

`(II) lt (III) lt (I)`

Text Solution

Verified by Experts

The correct Answer is:
B
Since Svi reactions involve the formation of carbocation as intermediate in the rate determining step, more is the stability of carbocation higher will be the reactivity of alkyl halides towards si route Since stability of carbocation follows order.
`CH_3-underset(1^(@))CH_2-CH_2" "lt" "underset(2^(@))CH_3-overset(oplus)CH-CH_2CH_3" " lt" "p-H_3CO-underset("benzylic")(C_(6)H_4)-overset(oplus)CH_2`
Hence correct order is `II lt I lt III`
Hence correct order is I
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DISHA PUBLICATION-HALOALKANES AND HALOARENES -Exercise -2 : Concept Applicator
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