未分類 45 - 題庫堂

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50. (S) (+)-Butanol shows a specific rotation at +13.52o. What is the ratio of (S) (+)-butanol and (

51. Consider the SN1 reaction of tert-butyl chloride with iodide ion:(CH3)3C-Cl + I - → (CH3)3C-I +

52. Which of the following functional groups would NOT show an IR absorbance above 3000 cm-1?(A) An

53. Which part of the electromagnetic spectrum interacts with the nuclear spins of protons ?(A) Radi

54. The pinacol rearrangement proceeds via intermediate.(A) carbanion (B) carbocation (C) radical (D

55. Which carbon in the following sugar is the anomeric carbon atom? (A) a (B) b (C) c (D) d (E) e

74. Based on the structure shown below, choose the stereoisomer having a configuration of (1R,3S,4S)

56. A tree diagram for the splitting of a proton Ha is reproduced below. What is the origin of this

75. Deduce the identity of the compound from the data provided.C8H13Br, 1H NMR δ(splitting, integral

76. Provide the structure of the major organic product in the following reaction. (E) none of these

57. Which of the following combinations of reactants would produce a meso compound?(A) Cis-3-hexene

58. What is the product of the following sequence of reactions? (A) 1,1-Diethylcyclopropane (B) Cis-

77. Which of the following reactions will result in the formation of a secondary alcohol(s) in good

59. An unknown hydrocarbon shows a parent peak on the mass spectra at m/z = 86. There is no evidence

78. Arrange the following reactions in order for preparing 1,4-diaminobutane from cyclohexene.I. NH3

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

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

60. Which statement is correct for the reaction shown below?1-chloro-2,4-dinitrobenzene + NaOH → 2,4

【單選題】每題 2 分，共計 40 分，答錯一題倒扣 0.5 分，倒扣至本大題零分為止，未作答，不給分亦不扣分。61. What is the product of the following rea

62. What is the major product of the following reaction?

63. What is the major product of the following reaction?

64. Which of the following compounds is the major organic product generated in the reaction below? P

65. Which of the following series of synthetic steps could be used to carry out the transformation s

66. What is the major organic product obtained from the following reaction? (A) 1 (B) 2 (C) 3 (D) 4

67. Which of the following statements correctly describes the molecule shown below? (A) Its C-4 NH2

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