14.9 (a) This diene has an s-cis conformation and should undergo Diels-Alder cycloaddition. (b) This diene has an s-trans conformation. Because the double bonds are in a fused ring system, it is not possible for them to rotate to an s-cis conformation. (c) Rotation can occur about the single bond of this s-trans diene. The resulting s-cis conformation, however, has an unfavorable steric interaction of a methyl group with a hydrogen at carbon 1. Rotation to the s-cis conformation is possible but not favored.

14.9 (a) This diene has an s-cis conformation and should undergo Diels-Alder cycloaddition. (b) This diene has an s-trans conformation. Because the double bonds are in a fused ring system, it is not possible for them to rotate to an s-cis conformation. (c) Rotation can occur about the single bond of this s-trans diene. The resulting s-cis conformation, however, has an unfavorable steric interaction of a methyl group with a hydrogen at carbon 1. Rotation to the s-cis conformation is possible but not favored.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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