2. What species is attacked by the alcohol's hydroxyl in the mechanism of the Swern oxidation?
(A) dimethylchlorosulfonium ion
(B) dimethylsulfoxide
(C) oxalyl chloride
(D) oxalinium ion
(E) aldehyde or ketone

78 I prigionieri del campo di Jiufen… (A)erano impiegati nelle botteghe del villaggio. (B)venivano tenuti lì dentro per fare lavori manuali. (C)erano costretti a cercare l’oro sotto terra. (D)venivano torturati e poi uccisi dai giapponesi.

79 Dalla fine dell’estrazione mineraria fino alla “rinascita” turistica di Jiufen, passarono circa… (A)10 anni. (B)20 anni. (C)30 anni. (D)40 anni.

80 L’ultimo evento che ha reso ancor più famoso il villaggio di Jiufen è stato… (A)una grande campagna pubblicitaria dell’ufficio turistico taiwanese. (B)una produzione cinematografica che ad esso si è ispirata. (C)una festival di arti tradizionali organizzato annualmente. (D)un grosso centro commerciale con ristoranti e negozi di ogni tipo.

I. Choose one correct answer for the following questions 【單選題】每題 1 分，共計 60 分，答錯 1 題倒扣 0.25 分，倒扣至本大題零分為止，未作答，不給分亦不扣分。 1. What is the carbon nucleophile which attacks molecular bromine in the acid-catalyzed α-bromination of a ketone? (A) an enol (B) a Grignard reagent (C) an acetylide (D) a carbocation (E) an enolate

3. When pyridine is treated with a mixture of nitric and sulfuric acids, the major product is . (A) 2-nitropyridine (B) 3-nitropyridine (C) 4-nitropyridine (D) 3-aminopyridine (E) 4-aminopyridine

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

5. When (R)-butan-2-ol is treated with TsCl in pyridine, the product formed is . (A) a single enantiomer (B) a racemic mixture (C) a mixture of diastereomers (D) an achiral compound (E) none of the above

6. What kind of polymer is produced in the following reaction? (A) a polycarbonate (B) poly(acrylonitrile) (C) a polyester (D) polyurethane (E) a synthetic rubber

7. Which of the following reagents should be used to convert hex-3-yne to {E}-hex-3-ene? (A) H2, Pt (B) Na, NH3 (C) H2, Lindlar's catalyst (D) H2SO4, H2O (E) HgSO4, H2O

8. SN1 reaction usually proceed with . (A) slightly more inversion than retention at the center undergoing substitution (B) slightly more retention then inversion at the center undergoing substitution (C) equal amounts of inversion and retention at the center undergoing substitution (D) complete inversion at the center undergoing substitution (E) complete retention at the center undergoing substitution