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104年 - 104 學士後西醫:有機化學#27032
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23. Which of the following structure represents (S)-L-alanine?
(A)
(B)
(C)
(D)
(E)
答案:
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統計:
A(3), B(3), C(3), D(1), E(43) #937552
詳解 (共 1 筆)
菩提
B1 · 2015/09/25
#1154656
標準答案修正為 E
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私人筆記 (共 2 筆)
王佳萱(已考上:)謝謝阿模前輩們的精華!
2022/01/23
私人筆記#3862018
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努力努力再努力
2019/04/19
私人筆記#1394149
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用Fischer projection來...
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其他試題
19. Which of the following carbonyl compounds may be made from 1,3-dithiane? I. Methyl vinyl ketone II. 2-Pentanone III. 3,3-Dimethyl-2-butanone IV. 2-Phenylethanal (A) I and IV (B) II only (C) II and III (D) II and IV (E) III and IV
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20. Predict the compound from the spectral data given. C9H10O2: 13C NMR, δ 18.06 (quartet), 45.40 (doublet), 127.32 (doublet), 127.55 (doublet), 128.61 (doublet), 139.70 (singlet), 180.98 (singlet); IR, broad 3500-2800, 1708 cm-1 (A) 3-Phenylproponic acid (B) 2-Phenylproponic acid (C) 2-(4-Methylphenyl)acetic acid (D) 2-(3-Methylphenyl)acetic acid (E) 2-(2-Methylphenyl)acetic acid
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21. Which of the following pairs of structures are not resonance forms of the same compounds? (A) (B) (C) (D) (E)
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24. Which of the following description(s) is(are) true for the following reaction? I: the solution of the products is optically active II: the products have stereocenters III: the products are meso compounds IV: the products are racemic mixture V: the reaction is enantioselective (A) V only (B) I and II (C) III and IV (D) II and V (E) II and IV
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26. Which of the following represents the HOMO for the conjugated system in Leukotriene B4? (A) (B) (C) (D) (E)
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27. Which of the following is the most stable conformation for cis-4-methyl-2-pentene? (A) (B) (C) (D) (E) All of the above
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28. Which of the following acids has the lowest pKa value? (A) (B) (C) (D) (E)
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