Which of the Following Statements About Photochemical Electrocyclic Reactions Is

question 38

Multiple Choice

Which of the following statements about photochemical electrocyclic reactions is not true?

• A) In photochemical reactions, we consider the orbitals of the HOMO of the excited state to determine the course of the reaction.
• B) Photochemical electrocyclic reactions occur in a conrotatory fashion for a conjugated polyene with an odd number of  bonds.
• C) Photochemical electrocyclic reactions occur in a disrotatory fashion for a conjugated polyene with an even number of  bonds.
• D) In photochemical reactions, we consider the orbitals of the LUMO of the excited state to determine the course of the reaction.

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