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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 · 2021 · Paper II

Q4(c)(ii). Alcohol to chloride with retention

Question

Give a conversion of a secondary alcohol to a secondary chloride with retention of configuration through an intimate ion pair.

Model answer

The free solution for 2021 answers questions 1, 2, 3, 5 and 6, the ones picked in its time plan. This part is not answered on the site yet. New answers are announced on Telegram.

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Topic notes: nucleophilic substitution (SN1, SN2, SNi, neighbouring group participation, solvent effects, rearrangement), with every Civil Services, IFoS and Geo-Scientist PYQ →

Topic notes: stereochemistry and conformational analysis (R/S, E/Z, Fischer and Newman projections, cyclohexane chair), with every Civil Services, IFoS and Geo-Scientist PYQ →

CoversSNi mechanismthionyl chlorideretention of configurationchlorosulfiteintimate ion pair

All parts of Question 4