question_answer

Acetophenone \[(Ph-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-C{{H}_{3}})\] is prepared in the laboratory by

A)  

B)  

C)  

D)  \[Ph-\overset{\begin{smallmatrix}  O \\  || \end{smallmatrix}}{\mathop{C}}\,-Cl+C{{H}_{4}}\xrightarrow{AlC{{l}_{3}}}\]

Correct Answer: C

Solution :

                 Key Idea Aromatic ketones can be prepared by Friedel-Crafts acylation or benzoylation. Acetophenone is prepared by the action of benzene with acetyl chloride in the presence of anhydrous \[AlC{{l}_{3}}\]In this reaction the H atom of benzene is replaced by acyl \[(COC{{H}_{3}})\] group.                 This reaction is an example of electrophilic substitution reaction. Note -