PROBLEM 15-20(a) Show that the [4 + 4] cycloaddition of two butadiene molecules to give cycloocta1,5-diene is thermally forbidden but photochemically allowed.(b) There is a different, thermally allowed cycloaddition of two butadiene molecules. Showthis reaction, and explain why it is thermally allowed. (Hint: Consider the dimerizationof cyclopentadiene.)

PROBLEM 15-20(a) Show that the [4 + 4] cycloaddition of two butadiene molecules to give cycloocta1,5-diene is thermally forbidden but photochemically allowed.(b) There is a different, thermally allowed cycloaddition of two butadiene molecules. Showthis reaction, and explain why it is thermally allowed. (Hint: Consider the dimerizationof cyclopentadiene.)

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter6: An Overview Of Organic Reactions

Section6.3: Radical Reactions

Problem 2P

See similar textbooks