Suitability of Diels Alder Reactants

Problem 1. Examine the following diene formulas ( A through G ) and select those that would not be a suitable diene component of a Diels-Alder reaction. Enter the letters corresponding to your selections in the answer box.
Do not enter superfluous characters, since they will be counted as incorrect answers.

		Which would not serve as Diels-Alder dienes?

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Problem 2. Examine the following formulas ( V through Z ) and select those that are probably good dienophiles in the Diels-Alder reaction.
Enter the letters corresponding to your selections in the answer box.
Do not enter superfluous characters, since they will be counted as incorrect answers.

Which are likely to function as good Diels-Alder dienophiles?

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