UPSC Combined Geo-Scientist, Mains · 2016 · Mains Paper III
Q7(d). Dipole moment of cyclopropenone
Question
Which has the greater dipole moment: A, 2,3-diphenylcyclopropenone, or B, benzophenone?
Answer in brief
A has the greater dipole moment because its charge-separated resonance contributor contains an aromatic cyclopropenyl cation.
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CoversDipole moment of cyclopropenoneResonance and aromaticity
All parts of Question 7
- 7(a) Acidity and hybridisation4 marks
- 7(b) Dichlorocarbene addition4 marks
- 7(c) Grignard addition to a keto ester4 marks
- 7(d) Dipole moment of cyclopropenone4 marks
- 7(e) Cannizzaro reaction4 marks
- 7(f) Frontier orbital nodes4 marks
- 7(g) Keto–enol claim: correction4 marks
- 7(h) Hofmann rearrangement and oxidation4 marks
- 7(i) Carbonyl stretching order4 marks
- 7(j) Carbon count from isotope peaks4 marks