NEETChemistryAldehydes Ketones and Carboxylic AcidsMCQ+4 / −1
The order of stability of the following tautomeric compounds is
- AII > I > III
- BII > III > I
- CI > II > III
- DIII > II > I
View written solutionFree
Correct answer: D
Enolic form predominates in compounds
containing two carbonyl groups separated by a
–CH2
group. This is due to following two
factors.
(i) Presence of conjugation which increases
stability.
(ii) Formation of intramolecular hydrogen
bond between enolic hydroxyl group and
second carbonyl group which leads to
stablisation of the molecule.
Hence the correct answer is III > II > I
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