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A new C—C bond formation is possible in:
- a)Cannizzaro’s reaction
- b)Friedel-Crafts’ reaction
- c)Clemmensen’s reduction
- d)Reimer-Tiemann reaction
Correct answer is option 'B,D'. Can you explain this answer?
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A new C—C bond formation is possible in:a)Cannizzaro’s rea...
Formation of C–C bond in Friedel-Crafts' reaction and Reimer-Tiemann reaction:
Friedel-Crafts' reaction:
- In the Friedel-Crafts' reaction, a new carbon-carbon bond is formed between an aromatic ring and an alkyl or acyl group.
- This reaction involves the electrophilic substitution of an aromatic ring with an alkyl or acyl halide in the presence of a Lewis acid catalyst such as aluminum chloride.
- The electrophilic species generated attacks the aromatic ring, leading to the formation of a new carbon-carbon bond.
- This reaction is commonly used for the synthesis of alkylbenzenes and acylbenzenes.
Reimer-Tiemann reaction:
- The Reimer-Tiemann reaction involves the formation of a new carbon-carbon bond between an aromatic ring and a carbonyl group.
- In this reaction, phenol or substituted phenol is treated with chloroform (CHCl3) and a strong base like aqueous sodium hydroxide (NaOH).
- The reaction proceeds via the formation of a carbene intermediate, which reacts with the aromatic ring to form a new carbon-carbon bond.
- The Reimer-Tiemann reaction is used for the synthesis of salicylaldehydes from phenols.
Therefore, both Friedel-Crafts' reaction and Reimer-Tiemann reaction involve the formation of new carbon-carbon bonds, making options 'B' and 'D' the correct choices for the question.
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A new C—C bond formation is possible in:a)Cannizzaro’s reactionb)Friedel-Crafts’ reactionc)Clemmensen’s reductiond)Reimer-Tiemann reactionCorrect answer is option 'B,D'. Can you explain this answer?
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