試題詳解

27. The energy changes for the hydrogenation of 1 mole of cyclohexene, cyclohexadienes, and benzene to produce I mole of cyclohexane are as follows. Which of the following statements is incorrect?
(A) , so the amount of heat released from hydrogenation of carbon- carbon double bonds is proportional to the number of carbon-carbon double bonds in the molecule.
(B) △H₂ < △H₃, so the interaction between two carbon-carbon double bonds alternates between single and double bonds, contributing to the stability of the substance.
(C) 3△H₁<△H₄，so there are not three completely independent carbon-carbon double bonds in the benzene molecule.
(D) △H₃-△H₁< 0 , △H₄-△H₃ > 0 , so the benzene molecule has a special stabilizing property.
(E) The C-H bond energy is greater than the average of the C-C π bond and H-H bond energy.