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75. What is the major organic product of the following reaction?

(A)
(B)
(C)
(D)
(E)

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統計： A(5), B(0), C(0), D(0), E(0) #2347851

其他試題

71. What is the major product of the following conversions? (A) (B) (C) (D) (E) none of the above

72. What is the major organic product of the following reaction? (A) (B) (C) (D) (E) none of the above

73. What reagent(s) would you use to accomplish the following conversion? (A) CH3Br, H3O+ (B) CH3MgBr, H3O+ (C) (CH3)2CuLi, H3O+ (D) CH3Br, LiAlH4, H3O+ (E) CH3MgBr, LiAlH4, H3O+

74. What carbonyl compound and what phosphonium ylide are required for the synthesis of the following alkene? (A) only (1) (B) only (2) (C) only (3) (D) (2) and (3) (E) (1),(2),and (3).

76. Which of the following is most reactive toward nucleophilic aromatic substitution? (A) (B) (C) (D) (E)

77. What are the products of the following reaction? (A) only (1) (B) only (2) (C) only (3) (D) (1) and (2) (E) (2) and (3)

78. An unknown compound has the formula C8H10OS, and is known to contain a thiophene ring. The proton NMR spectrum of this compound is: 0.98, triplet, 3H; 1.74, multiplet, 2H; 2.80, triplet, 2H; 7.40, multiplet, 1H; 7.55, multiplet, 2H. What is the structure of this compound? (A) (B) (C) (D) (E) none of the above.

79. Deduce the identity of the compound from the data provide. C5H8O4: IR(cm-1):2800-3300 (broad), 2950, 1740 13C NMR (δ, splitting): 17.3 (quartet), 44.3 (singlet), 210.5 (singlet). (A) HO2CC(CH3)2CO2H. (B) CH3O2CCH2CO2CH3. (C) HO2CCCH2CH2CH2CO2H. (D) CH3O2CCH2CH2CO2H. (E) CH3O2CCO2CH2CH3.

80. What is the major organic product of the following reaction? (A) (B) (C) (D) (E)none of the above.

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