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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(a). Condensation of diethyl succinate

Question

Diethyl succinate is treated with NaOEt/EtOH to give A, followed by aqueous NaOH and heating to give B. Identify A and B and explain step 1.

Answer in brief

A is diethyl 2,5-dioxocyclohexane-1,4-dicarboxylate (diethyl succinylsuccinate); hydrolysis, acidification and decarboxylation give cyclohexane-1,4-dione B.

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

CoversClaisen condensationdiethyl succinylsuccinatecyclohexane-1,4-dionedecarboxylationDieckmann condensation

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