question_answer 38)

Classify the following reactions in one of the reaction type studied: (i) \[C{{H}_{3}}C{{H}_{2}}Br+H{{S}^{-}}\xrightarrow{{}}C{{H}_{3}}C{{H}_{2}}SH\] (ii)\[{{(C{{H}_{3}})}_{2}}C=C{{H}_{2}}+HCl\xrightarrow{{}}{{(C{{H}_{3}})}_{2}}CCl-C{{H}_{3}}\](iii)\[C{{H}_{3}}C{{H}_{2}}Br+H{{O}^{-}}\to {{H}_{2}}C=C{{H}_{2}}+{{H}_{2}}O\] (iv)\[{{(C{{H}_{3}})}_{3}}C-C{{H}_{2}}OH+HBr\to (C{{H}_{3}})CBrC{{H}_{2}}C{{H}_{3}}\]  

Answer:

(i) Nucleophilic substitution (ii) Electrophilic addition (iii) Elimination (bimolecular) (iv) Rearrangement of carbocation intermediate formed followed by nucleophilic substitution.