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UPSC Combined Geo-Scientist

Chemist

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

Mains Paper III covers analytical and organic chemistry.

UPSC Combined Geo-Scientist, Mains · 2019 · Mains Paper III

Q10(b). Acetylacetone proton NMR

Question

Predict the ¹H NMR spectrum of acetylacetone with approximate chemical shifts.

Answer in brief

Both keto and enol signals can occur; their relative areas depend on solvent and temperature.

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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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CoversAcetylacetone proton NMRTautomerism and spectroscopy

All parts of Question 10