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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

Q4(a). Grignard addition and competing reduction

Question

Explain the products from cyclohexanone with (i) MeMgBr and (ii) tert-BuMgBr, each followed by aqueous acid.

Answer in brief

(i) 1-Methylcyclohexan-1-ol. (ii) 1-tert-Butylcyclohexan-1-ol may form, but reduction to cyclohexanol and enolization compete more strongly.

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Topic notes: carbonyl additions and condensations, with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversGrignard reactionGrignard reductionβ-hydride transferenolizationtert-butylmagnesium bromide

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