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Which of the Following Statements Concerning Electrocyclic Reactions Is (Are)correct

Question 78

Multiple Choice

Which of the following statements concerning electrocyclic reactions is (are) correct?


A) The ground state HOMO of a compound with an even number of conjugated double bonds is asymmetric.
B) The allowed mode of ring closure under thermal conditions for a molecule containing an even number of conjugated double bonds is disrotatory.
C) The allowed mode of ring closure under photochemical conditions for a molecule containing an odd number of conjugated double bonds is disrotatory.
D) both B and C
E) none of the above

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