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Indian Forest Service (Mains)

Chemistry optional

  • 2 papers
  • 200 marks each
  • 3 h per paper

Paper II covers organic chemistry and spectroscopy.

Indian Forest Service (Mains), Chemistry optional · 2024 · Paper II

Q5(c). Two Birch reductions

Question

Give products for (i) o-toluic acid with Na/liquid NH₃/t-BuOH at −78 °C and (ii) 1,3-dimethoxybenzene under Birch conditions.

Answer in brief

(i) 2-Methylcyclohexa-2,5-diene-1-carboxylic acid after acid work-up; (ii) 1,5-dimethoxycyclohexa-1,4-diene.

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Topic notes: reagents for oxidation, reduction and hydroboration, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversBirch reductionNa liquid NH3o-toluic acid1,3-dimethoxybenzenecyclohexa-1,4-diene

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