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In the reaction C(6)H(6)+CH(2)=CH(2)ov...

In the reaction
`C_(6)H_(6)+CH_(2)=CH_(2)overset(HX)to`
The best acid to be used is

A

`HI`

B

`HCl`

C

`HF`

D

`HBr`

Text Solution

Verified by Experts

The correct Answer is:
3
The proton donor HX must afford a weak nucleophile `(F^(-))` because a stronger nucleophile ssuch as `I^(-)`, `Br^(-)` and `Cl^(-)` would add to the protonated alkene forming `CH_(3)CH_(2)I` etc. Thereby preventing the reaction fo alkene with benzene.
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