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alexira [117]
3 years ago
12

Using molecular orbitals, determine if the following cycloaddition of 1,3-butadiene and allyl anion is thermally allowed. heat ?

Chemistry
1 answer:
ASHA 777 [7]3 years ago
4 0

Answer: cycloaddition of 1,3-butadiene and allyl anion is thermally allowed.

Explanation:

Using the frontier molecular orbital approach, we consider if the symmetry of the LUMO of the diene (1,3-cyclobutadiene) and the HOMO of the dienophile allyl anion), match each other since the diels alder reaction is a symmetry allowed process. The symmetries of these frontier molecular orbitals match each other hence the reaction is thermally allowed. It should be notes that 4+2 cycloadditions are thermally allowed although they are slow.

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