1.

Consider the reactions: (i) (CH_(3))_(2)CH-CH_(2)Broverset(C_(2)H_(5)OH)to(CH_(3))_(2)CH-CH_(2)OC_(2)Hd_(5)+Br^(-) (ii) (CH_(3))_(2)CH-CH_(2)Broverset(C_(2)H_(5)O^(-))to(CH_(3))_(2)CH-CH-(2)OCH_(2)H_(5)+Br^(-) The mechanism of reactions (i) and (ii) are respectively-

Answer»

`S_(N)1andS_(N)2`
`S_(N)1andS_(N)1`
`S_(N)2andS_(N)2`
`S_(N)2andS_(N)1`

Solution :Carbocation INTERMEDIATE is formed in case of `S_(N)1` reaction and the corbocations attains stability via rearrangements have taken place. Therefore, it MAY be ASSUMED that they follow `S_(N)2` mechanism.


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