Which of the Following Statements About Orbital Symmetry and Cycloaddition

question 60

Multiple Choice

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

• A)Thermal cycloadditions involving an even number of p bonds proceed by a suprafacial pathway.
• B)Thermal cycloadditions involving an odd number of p bonds proceed by an antarafacial pathway.
• C)Photochemical cycloadditions involving an even number of p bonds proceed by an antarafacial pathway.
• D)Photochemical cycloadditions involving an even number of p bonds proceed by a suprafacial pathway.

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