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109年 - 109 國立台灣大學_碩士班招生考試:有機化學(A)#90650
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23. Which of the following reagents would not convert an alkene to an alcohol? (A) Br
2
, H
2
O (B) (1) Hg(OAc)
2
, H
2
O; (2) NaBH
4
(C) 1) MCPBA; 2) H
3
O
+
(D) 1) O
3
; 2) CH
3
SCH
3
(E) 1) BH
3
-THF; 2) H
2
O
2
, NaOH
其他申論題
19. Which of the following compounds has a chirality center with the R configuration? (A) (B) (C) (D) (E)
#371303
20. Which of the following is a meso compound? (A) (B) (C) (D) (E)
#371304
21. Which of the following types of compounds could not afford carboxylic acid product upon hydrolysis? (A) nitrile (B)triglyceride (C) thioester (D) enamine(E)imide
#371305
22. Which of the following thermal reactions does not need a catalyst? (A) hydrogenation of isoproylene (B) hydration of acetylene (C) cis-trans isomerization of 2-butene (D) Wolff-Kishner reduction of acetone hydrazone (E) Cope rearrangement of 3-methyl-1,5-hexadiene
#371306
24. How many of the following reactions give enantiomeric pairs as major products? (A)1 (B)2 (C)3 (D)4 (E)5
#371308
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
#371309
26. What type of compound would best fit the following IR spectrum? (A) Alkene (B) Alkyne (C) Phenol (D) Aldehyde (E) Amide
#371310
27. How many triplet signals are expected for the following compound in 1H NMR? (A)0 (B)1 (C)2 (D)3 (E)4
#371311
28. Which of the following conditions does not generate carbocation intermediates? (A) (B) (C) (D) (E)
#371312
29. Which of the following is the LUMO of 1,3,5-hexatriene? (A) (B) (C) (D) (E)
#371313