Organic Compounds Containing Halogens Question 100
Question: A new carbon-carbon bond formation is possible in
[IIT-JEE 1998]
Options:
A) Cannizzaro reaction
B) Friedel-Crafts alkylation
C) Clemmensen reduction
D) Reimer-Tiemann reaction
Show Answer
Answer:
Correct Answer: B
Solution:
New carbon-carbon bond formation takes place in Friedel Crafts alkylation and Reimer-Tiemann reaction. In Friedel Crafts alkylation following mechanism involves
$ R-Cl+AlCl_3 $ ⇌ $ \underset{\text{Alkyl carbonium ion}}{\mathop{{R^{\oplus }}}}+AlCl_4^{}+HCl $
Here a new C-C bond is formed between carbon of benzene ring and alkyl group. Similarly in Reimer-Tiemann reaction. Here a new C-C bond is formed between carbon of benzene ring and -CHO group.
BETA
