Which of the Following Statements About Thermal Electrocyclic Reactions Is

question 6

Multiple Choice

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

• A)The number of s 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 p bonds.
• C)Thermal electrocyclic reactions occur in a conrotatory fashion for a conjugated polyene with an even number of p 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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