Which of the Following Statements About Thermal Electrocyclic Reactions Is

question 14

Multiple Choice

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

• A) The number of  bonds in the conjugated polyene determines whether rotation is conrotatory or disrotatory.
• B) Thermal electrocyclic reactions occur in a disrotatory fashion for a conjugated polyene with an odd number of  bonds.
• C) Thermal electrocyclic reactions occur in a conrotatory fashion for a conjugated polyene with an even number of  bonds.
• D) In thermal reactions, we consider the orbitals of the HOMO of the ground state electronic configuration to determine the course of the reaction.

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