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首頁 > 研究所、轉學考(插大)-有機化學 > 109年 - 109 國立台灣大學_碩士班招生考試：有機化學(A)#90650 >

27. How many triplet signals are expected for the following compound in ¹H NMR?
(A)0 (B)1 (C)2 (D)3 (E)4

其他申論題

23. Which of the following reagents would not convert an alkene to an alcohol? (A) Br2, H2O (B) (1) Hg(OAc)2, H2O; (2) NaBH4(C) 1) MCPBA; 2) H3O+ (D) 1) O3; 2) CH3SCH3(E) 1) BH3-THF; 2) H2O2, NaOH

24. How many of the following reactions give enantiomeric pairs as major products? (A)1 (B)2 (C)3 (D)4 (E)5

25. Which type of reaction accounts for the oxidation of a primary alcohol to an aldehyde? (A) Substitution (B) Addition (C) Elimination (D) Rearrangement (E) Chain reaction

26. What type of compound would best fit the following IR spectrum? (A) Alkene (B) Alkyne (C) Phenol (D) Aldehyde (E) Amide

28. Which of the following conditions does not generate carbocation intermediates? (A) (B) (C) (D) (E)

29. Which of the following is the LUMO of 1,3,5-hexatriene? (A) (B) (C) (D) (E)

30. Which of the following compounds is not considered as an antioxidant? (A) (B) (C) (D) (E)

(a) Give the IUPAC name of cumene.

(b) Draw the reaction mechanism (with curved arrows) for step I.

(c) Draw the reaction mechanism (with curved arrows) for step II.

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