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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

Q5(c). Vinylcyclopropane rearrangement

Question

Predict the products of vinylcyclopropane on heating, followed by NCS, benzoyl peroxide and light.

Answer in brief

Thermal rearrangement gives cyclopentene; radical allylic chlorination then gives 3-chlorocyclopent-1-ene.

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The full model answer

As written for the answer booklet: the diagram carries the working, the lines stay short. Read here only; it is not offered as a download.

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Topic notes: pericyclic reactions, with every Civil Services, IFoS and Geo-Scientist PYQ →

Coversvinylcyclopropane rearrangementcyclopenteneallylic chlorinationNCSradical substitution

All parts of Question 5