Hydrocarbons Question 236
Question: Which of the following would not give 2-phenylbutane as the major product in a Friedel- Crafts alkylation reaction on benzene ring-
Options:
A) 1-butene+HF
B) 2-butanol $ +H_2SO_4 $
C) Butanoyl chloride $ +AlCl_3 $ then $ Zn,HCl $
D) Butyl chloride $ +AlCl_3 $
Show Answer
Answer:
Correct Answer: C
Solution:
[c] The Friedal-crafts acylation reaction will give propyl phenyl ketone which further on Clemmenson’s reduction will give butyl benzene
$ C_6H_6+CH_2CH_2CH_2COCl\xrightarrow{AlCl_3} $
$ C_6H_5COCH_2CH_2CH_3\xrightarrow{Zn-Hg/HCl}\underset{(Butylbenzene)}{\mathop{C_6H_5CH_2CH_2CH_2CH_3}} $
BETA
