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15. Which of the following structures, would be classified as anti-aromatic?
(A)
(B)
(C)
(D)
(E) all of the above

答案：登入後查看
統計： A(0), B(2), C(0), D(1), E(0) #2055432

其他試題

11. To which side (if any) would the following equilibrium lie? (A) to the left (B) to the right (C) equally to the right and left (D) there is no way to tell (E) only SN2, SN1 and E2 reactions are possible

12. Which of the haloalkanes below would you expect to most rapidly undergo the reaction shown? (A) CH3CH2Br (B) (C) (CH3)3CBr (D) (CH3)2CHBr (E) (CH3) 3CCH2Br

13. A mixture of oct-1-yne, oct-2-yne, and oct-3-yne was hydrogenated in the presence of a platinum catalyst until hydrogen uptake ceased. If one assumes that the hydrogenation went to completion, how many different eight-carbon hydrocarbons were produced? (A) 1 (B) 2 (C) 3 (D) 6 (E) 8

14. Which of the following would you expect to have the lowest boiling point? (A) CH3CH2OH (B) CH3CO2H (C) CH3CH2OCH2CH3 (D) (CH3CH2)2NH (E) (CH3CH2)3N

16. Which alkene has the lowest heat of hydrogenation ΔH°hydrog? (A) (B) (C) (D) (E)

17. Which of the following alkyl halides would be suitable to use when forming a Grignard reagent? (A) BrCH2CH2CH2CN (B) CH3COCH2CH2Br (C) (CH3) 2NCH2CH2Br (D) H2NCH2CH2Br (E) all of the above

18. Rank the following aromatics in order of decreasing reactivity toward electrophilic aromatic substitution (most reactive ＞ least reactive). (A)A ＞ C ＞ D ＞ B (B) D ＞ C ＞ A ＞ B (C) B ＞ C ＞ A ＞ D (D) D ＞ A ＞ C ＞ B (E) C ＞ A ＞ D ＞ B

19. Which of the following resonance structures is the most stable? (A) (B) (C) (D) (E)

20. Rank the following in order of decreasing acidity (more acidic ＞ less acidic): (A) II ＞ III ＞ I ＞ IV ＞ V (B) IV ＞ II ＞ I ＞ III ＞ V (C) II ＞ IV ＞ I ＞ III ＞ V (D) V ＞ III ＞ I ＞ II ＞ IV (E) II ＞ IV ＞ I ＞ V ＞ III

21. How would you rank the following in decreasing order of reactivity toward nucleophilic aromatic substitution? (most reactive on left) (A) 4 ＞ 1 ＞ 3 ＞ 2 (B) 2 ＞ 3 ＞ 1 ＞ 4 (C) 3 ＞ 2 ＞ 4 ＞ 1 (D) 1 ＞ 3 ＞ 2 ＞ 4 (E) impossible to predict

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