未分類

24. What is the major organic product obtained from the following sequence of reactions? (A) 1 (B) 2

44.Ninhydrin與α-amino acid反應如下，得到的紫色產物？

57. A sample of compound X is subjected to elemental analysis and the following percentages by weigh

58. Which of the following conditions will drive the equilibrium of the Fischer esterification towar

59. The Wittig reaction involves .(A) formation of carboxylic acids (B) formation of alkenes (C) for

60. The protons marked Ha and Hb in the molecule below are ______. (A) chemically equivalent (B) ena

25. What is the major product of the following reaction? (A) 1 (B) 2 (C) 3 (D) 4 (E) 5

45.下列生合成(biosynthesis)反應中，proline是從何種起始化合物轉變成？ -

【單選題】每題 2 分，共計 40 分，答錯 1 題倒扣 0.5 分，倒扣至本大題零分為止，未作答，不給分亦不扣分。61. Provide the structure of the major org

26. Which of the following terms best describes the compound shown below? (A) a lecithin (B) a diter

46.下列化合物中，何者是最強的布忍斯特酸(Brenstedacid) ? (A) I(B) II(C) III (D)IV

62. Provide the structure of the major organic product in the following reaction.

27. What configurations are found in the product(s) of the reaction shown below? (A) 1R, 2R only (B)

47.下列反應得到之化合物，其分子式為C9Hl7N，其構造式是：

63. Provide the structure of the major organic product in the following reaction.

28. Which of the following statements correctly describes the molecule shown below? (A) It is achira

48.下列化合物中，最酸性的氫(themost acidic hydrogen) (箭頭所示)是: (A) I(B) II (C)III (D) IV

29. Which of the following m/z values is the base peak for benzyl alcohol?(A) 17 (B) 52 (C) 77 (D) 9

30. What splitting pattern is observed in the proton NMR spectrum for the indicated hydrogens? (A) S

64. Provide the structure of the major organic product in the following reaction.

49.下列反應最終產物是：

31. The Hell-Volhard-Zelinsky reaction involves:(A) α-Bromination of carboxylic acids (B) α-Brominat

32. Which of the following reagents would reduce carboxylic acids and esters into alcohols?(A) H2/Ra

33. Which of the following reducing agents is best used in the reaction shown below? (A) H2/Ranney N

65. Provide the structure of the major organic product in the reaction below.

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