question_answer

Which of the following reagents is/are INCORRECT for the given conversion?

A) (i) \[M{{e}_{2}}C=C{{H}_{2}}/HF\]at \[0{}^\circ C\]  (ii) \[2MeCl/AlC{{l}_{3}}\]           (iii) HF at high temperature

B) (i) \[M{{e}_{3}}C-OH/B{{F}_{3}},\]      (ii) \[2MeCl/AlC{{l}_{3}}\]         (iii) HF at high temperature

C) (i) \[{{C}_{3}}{{H}_{7}}Cl/AlC{{l}_{3}}\]                     (ii)\[2MeCl/AlC{{l}_{3}}\]          (iii) HF at high temperature

D) (i) Conc. \[{{H}_{2}}S{{O}_{4}},\]                    (ii)\[2MeCl/AlC{{l}_{3}}\]          (iii) \[{{H}_{2}}S{{O}_{4}}+Steam\,\,({{H}_{2}}O)\]

Correct Answer: C

Solution :

[c] \[(Me-)\]group is o, p-directing, so p-position has to be blocked by \[s'{{'}^{1}}\]'phonation or by bulky t butyl group.