1.

Consider the reaction: (i) (CH_(3))_(2)CH-CH_(2)Br overset(C_(2)H_(5)OH)to(CH_(3))_(2)CH-CH_(2)OC_(2)H_(5)+HBr (ii) (CH_(3))_(2)CH-CH_(2)Br overset(C_(2)H_(5)O^(-))to(CH_(3))_(2)CH-CH_(2)OC_(2)H_(5)+Br^(-) The mechanisms of reactions (i) and (ii) are respectively:

Answer»

`S_(N)1 and S_(N)2`
`S_(N)1 and S_(N)1`
`S_(N)2 and S_(N)2`
`S_(N)2 and S_(N)1`

SOLUTION :Since rearrangements do not occur in the given nucleophilic SUBSTITUTION reactions, THEREFORE, carbocations are not the immediates in these reactions. Thus, both the reactions occur by `S_(N)2` mechanism, i.e., option (C) is correct.


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