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109年 - 109亞洲大學_學士後招生_獸醫學系︰化學(含普通化學、有機化學)#100887
> 試題詳解
32. Which conformation of pentane is most stable?
(A) I
(B) II
(C) III
(D) IV
答案：
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統計：
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30. Which acid is the most acidic?(A)I (B) II (C) III (D) IV
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31. Which is the IUPAC name for the following cycloalkane? (A) 2,4-dimethyl-1-ethylcyclopentane(B) 1,3-dimethyl-5-ethylcyclopentane (C) 1-ethyl-2,4-dimethylcyclopentane(D) 1-ethyl-3,5-dimethylcyclopentane
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33. Which of these diaxial conformations has the highest energy? (A) I(B) II(C) III(D) IV
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34. Which structure is Z-2-bromo-3-methyl-2-pentene? (A) I(B) II(C) III(D) IV
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36. Which of the following alkenes is the major product when 2-bromo-2-methylpentane is treated with sodium ethoxide in ethanol? (A) 2-methylpent-1-ene(B) 2-methylpent-2-ene(C) (E)-4-methylpent-2-ene (D) (Z)-4-methylpent-2-ene
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37. Which of the following alkenes is the major product when 2-bromo-2-methylpentane is treated with potassium tert-butoxide in tert-butanol? (A) 2-methylpent-1-ene(B) 2-methylpent-2-ene(C) (E)-4-methylpent-2-ene (D) (Z)-4-methylpent-2-ene
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38. Which of the following statements applies to the E2 mechanism? (A) It occurs with inversion of stereochemistry. (B) It occurs with racemization of stereochemistry. (C) It proceeds through the more stable carbocation intermediate. (D) The C-H and C-X bonds that break must be anti.
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