4. Which of the following is a correct Diels-Alder reaction product of the following reaction?

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

複選題16. (AB) When you have emotional intimacy in a relationship, you feel like you can really be yourself and that they accept and love you for who you are. (AC) You need to feel safe sharing your thoughts, feelings, and experiences without fear of judgment or rejection. (AD) The truth is that emotional intimacy is a vital part of any close relationship, even platonic relationships. (AE) It also means being curious about where the other person is coming from without judgment and ridicule. (BC) This makes sense, as we often need time to develop trust and intimacy with someone. (BD) Our upbringing and society’s messages have played a significant role in our fear of intimacy and vulnerability.(AB) When you have emotional intimacy in a relationship, you feel like you can really be yourself and that they accept and love you for who you are. (AC) You need to feel safe sharing your thoughts, feelings, and experiences without fear of judgment or rejection. (AD) The truth is that emotional intimacy is a vital part of any close relationship, even platonic relationships. (AE) It also means being curious about where the other person is coming from without judgment and ridicule. (BC) This makes sense, as we often need time to develop trust and intimacy with someone. (BD) Our upbringing and society’s messages have played a significant role in our fear of intimacy and vulnerability.

1. What is the correct IUPAC name for the following compound? (A) (2R,5R)-5-chloro-2-methylcycloheptan-1-one (B) (2S,5R)-5-chloro-2-methylcycloheptan-1-one (C) (2R,5R)-5-chloro-2-methylcyclohexan-1-one (D) (1R,5R)-1-chloro-5-methylcycloheptan-3-one (E) (1R,4R)-4-chloro-1-methylcycloheptan-7-one  

2.Predict and arrange the reactivity of the following compounds in ascending order when reacting with HBr. (A)2＜3＜5＜1＜4 (B)5＜3＜2＜4＜1 (C)1＜2＜5＜3＜4 (D)4＜1＜3＜5＜2 (E)2＜5＜3＜1＜4

3. Which of the following structures, if flat, can be considered aromatic? (A) 1 only. (B) 3 and 5 only. (C) 2 and 4 only. (D) 1 and 3 only. (E) None of the above.

5. Which of the following reaction will NOT give the product as shown? (A)(B)(C)(D)(E)

6. Consider a system in which an ester is hydrolyzed in a base catalyzed hydrolysis using potassium hydroxide as the base. After the reaction, what will happen theoretically concerning the acidity of the reaction mixture when compared to the beginning of the reaction? (A) The mixture will become more basic compared to the beginning. (B) The mixture will become more acidic compared to the beginning. (C) The acidity of the reaction mixture will not change. (D) The concept of acidity cannot be applied to organic system. (E) The exact situations depend on the actual structure of the ester.

7. Which of the following position is the most reactive towards electrophilic aromatic substitution? (A)A(B)B(C)C(D)D(E)E

8. Describe the number of signals and their splitting in the 1H NMR of the following compound: (A) 7 signals: 1 singlet, 2 doublets, 1 triplet, 3 quartet (B) 6 signals: 1 singlet, 3 doublets, 1 triplet, 1 quartet (C) 7 signals: 4 doublets, 2 triplet, 1 quartet (D) 7 signals: 1 singlet, 4 doublets, 1 triplet, 1 quartet (E) 8 signals: 2 singlet, 4 doublets, 1 triplet, 1 quartet

9.Which of the following pair of structures represent an identical compound? (A)(B)(C)(D)(E)

10. Which of the following solvent is the most soluble in water? (A) hexanoic acid (B) dichloromethane (C) dimethylformamide (D) 1-butanol (E) ethyl acetate