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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 · 2017 · Mains Paper III

Q9(c). Lactone carbonyl frequencies

Question

Order C=O stretching frequencies for the depicted six-membered lactones: I saturated, II with C=C conjugated to C=O, III with C=C next to the ring oxygen.

Answer in brief

III > I > II.

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CoversLactone carbonyl frequenciesInfrared spectroscopy

All parts of Question 9