Which of the following statements about orbital symmetry and cycloaddition reactions is true?

Question

Quizplus · Accepted Answer

The Woodward-Hoffmann rules state that thermal and photochemical reactions involve different pathways based on the number of F1F1F1S1F1F1F10 bonds involved and the even or odd nature of the bonds. Thermal reactions involving an even number of F1F1F1S1F1F1F10 bonds proceed by a suprafacial pathway, while thermal reactions involving an odd number of such bonds proceed by an antarafacial pathway. For photochemical reactions, the opposite is true, with even numbers of F1F1F1S1F1F1F10 bonds proceeding by an antarafacial pathway and odd numbers proceeding by a suprafacial pathway. Therefore, the correct statement is D.

Which of the Following Statements About Orbital Symmetry and Cycloaddition π\piπ

Which of the Following Statements About Orbital Symmetry and Cycloaddition $\pi$