Question:
A new carbon-carbon bond formation is possible in:
I. Cannizzaro reaction II. Friedel-Crafts reaction III. Clemmensen reduction IV. Reimer-Tiemann reaction
A new carbon-carbon bond formation is possible in:
I. Cannizzaro reaction II. Friedel-Crafts reaction III. Clemmensen reduction IV. Reimer-Tiemann reaction
I. Cannizzaro reaction II. Friedel-Crafts reaction III. Clemmensen reduction IV. Reimer-Tiemann reaction
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Friedel-Crafts = C–C bond formation reaction.
Updated On: Apr 16, 2026
- I, II and III
- II, III and IV
- I and III
- II and IV
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The Correct Option is D
Solution and Explanation
Concept: Carbon–carbon bond formation occurs in reactions where the carbon chain is extended.
Check each reaction:
• Cannizzaro reaction → No C–C bond formation
• Friedel-Crafts reaction → Alkylation/acylation \(\Rightarrow\) C–C bond formation
• Clemmensen reduction → Reduction only (no C–C bond)
• Reimer-Tiemann reaction → Formylation introduces \(-CHO\) group \(\Rightarrow\) C–C bond formation Final Answer: \({(D)\ \text{II and IV}}\)
• Cannizzaro reaction → No C–C bond formation
• Friedel-Crafts reaction → Alkylation/acylation \(\Rightarrow\) C–C bond formation
• Clemmensen reduction → Reduction only (no C–C bond)
• Reimer-Tiemann reaction → Formylation introduces \(-CHO\) group \(\Rightarrow\) C–C bond formation Final Answer: \({(D)\ \text{II and IV}}\)
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