35. The product of the following reaction immediately undergoes a dimerization at room temperature. What is the structure of the dimer? 
(A) 
(B) 
(C) 
(D) 
(E)

31. Choose the major product of the following reaction. (A) (B) (C)  (D) (E)

32. Rank the following molecules in order of increasing relative rate of SN1 solvolysis with methanol and heat (slowest to fastest reacting).(A) III<II<IV<I<V (B) II<III<IV<I<V (C) I<IV<III<II<V(D) II<III<IV<V<I (E) I<II<V<IV<III 

33. Which of the following compounds will react with methyl vinyl ketone in a Robinson annulation to generate the cyclic enone below?  (A) 1-pentene (B) cyclohexanone (C) 2-pentanone (D) pentanal (E) None of the above

34. Provide the structure of the major organic product in the reaction below. (A)(B)(C)(D)(E)

36. For the following multistep synthesis, choose the best reaction conditions to give the desired product? (A) (i) HBr, (ii) O3 followed by Zn/H+ , (iii) Li/NH3 (B) (i) NaNH2/NH3 followed by CH3CH2I, (ii) Lindlar’s catalyst/H2, (iii) OsO4 followed by NaHSO3 (C) (i) H2/Pd/C (1 equivalent), (ii) NaNH2/NH3 followed by CH3CH2Br, (iii) KMnO4/H2O (D) (i) HgSO4/H2O/H2SO4, (ii) Lindlar’s catalyst/H2, (iii) OsO4 followed by NaHSO3 (E) (i) Lindlar’s catalyst/ H2, (ii) NaNH2/NH3 followed by CH3CH2Br, (iii) OsO4 followed by NaHSO3

37. Which sequence of steps below describes the best synthesis of 5-oxohexanoic acid starting with 1-methylcyclopentan-1-ol? (A) 1. Conc. KMnO4; 2. Dry gaseous HBr; 3. Mg/ether; 4. CO2 (B) 1. H2SO4 and heat; 2. Conc. KMnO4 (C) 1. Conc. KMnO4; 2. CH3MgBr/ ether; 3. H3O+ (D) 1. H2SO4 and heat; 2. O3; 3. (CH3) 2S; 4. PCC (E) 1. H2SO4 and heat; 2. Conc. KMnO4; 3. LiAlH4; 4. H3O+

38. Which of the following amines could be formed by reduction of an amide? (I) benzylamine (II) isopropylamine (III) aniline (IV) triethylamine (A) I (B) III & IV (C) I & IV (D) II & III (E) I, III & IV

39. What is the major product of the following reaction? (A) I (B) II (C) III (D) IV (E) V

40. Predict the major product of the following reaction sequence. (A) I (B) II (C) III (D) IV (E) V

41. Predict the major product of the following dehydration reaction. (A) I (B) II (C) III (D) IV (E) V