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MHT CET202526 Apr 2025Evening ShiftChemistryHaloalkanes and HaloarenesActual

Which of the following is a fittig reaction?

Options

  1. AC ₆ H ₅ Br + CH ₃- Br +2 Na [ ether ] dry C ₆ H ₅- CH ₃+2 NaBr
  2. B2 C ₂ H ₅ Br +2 Na [ ether ] dry C ₂ H ₅- C ₂ H ₅+2 NaBr
  3. C2 CH ₃ Br +2 Na [ ether ] dry CH ₃- CH ₃+2 NaBr
  4. D2 C ₆ H ₅ Br +2 Na [ ether ] dry C ₆ H ₅- C ₆ H ₅+2 NaBr

Correct answer

D. 2 C ₆ H ₅ Br +2 Na [ ether ] dry C ₆ H ₅- C ₆ H ₅+2 NaBr

Step-by-step solution

The Fittig reaction couples two aryl halides with sodium in dry ether to form a biaryl compound: 2 Ar-X + 2 Na dry ether Ar-Ar + 2 NaX Option A: C ₆ H ₅ Br + CH ₃- Br +2 Na dry ether C ₆ H ₅- CH ₃+2 NaBr involves an aryl halide and an alkyl halide, characteristic of the Wurtz–Fittig reaction . Option B: 2 C ₂ H ₅ Br +2 Na dry ether C ₂ H ₅- C ₂ H ₅+2 NaBr uses only alkyl halides, indicating the Wurtz reaction . Option C: 2 CH ₃ Br +2 Na dry ether CH ₃- CH ₃+2 NaBr also uses alkyl halides and is another Wurtz reacti

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