Concept explainers
Interpretation:
Given that the major product formed by intramolecular aldol cyclization of 2, 5-heptanedione has two singlet absorptions in the 1H NMR spectrum at 1.65 δ and 1.90 δ and has no absorptions in the range 3 δ to 10 δ. Its structure is to be given.
Concept introduction:
Looking at the number of signals and the region in which they are observed it is possible to predict the major product.
To give:
The structure of the major product formed by the intramolecular aldol cyclization of 2, 5-heptanedione that has two singlet absorptions in the 1H NMR spectrum at 1.65 δ and 1.90 δ and has no absorptions in the range 3 δ to 10 δ.
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