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- What's the mechanism?Which molecule is a reaction intermediate in the mechanism of the reaction shown below? a. OH 人士 O b. O O d. l 1. OH MgBr (2 equiv.) 2. H3O+1. What are the expected major products (A, B and C) in the following reaction sequence? OH PBr3 A C 1. Mg, Et₂0 2. (CH3)₂C=0 3. H H™, heat B
- Which of the reacting sequence of nitration is correct? A. bc>a>d C.>b>a>c E.c>b>a>d B. c>a>b>d D. d>a>b>c OA A OBB ODD OE ED. 36. Which of the following choices is the key intermediate in the reaction shown below. A. CI- H A. CH₂CH₂ + Cl₂ B. -CHCH, C. CH₂CH₂ NO₂ 4-nitro-t-butylbenzene D. 37. What is the major product of the reaction shown below: NO₂ FeCl, B. Fe, HCI, H₂O then neutralize with NaOH (CH₂),CCI HNO, AICI, H₂SO (CH₂) CH AICI, NO₂ A. B. CL C. D. 38. Of the following synthetic routes, which is the best synthesis of 4-nitro-t-butylbenzene (structure shown below). C(CH3)3 HNO, (CH₂)₂CCI H₂SO AICI, HNO (CH₂),COH H₂SO H₂SO CHCH HNO₂ H₂SO -CH₂CH₂ C. NH₂ CI OH CH₂CH₂Question 32: Which elementary step occurs first in the mechanism of the reaction in Figure 32?* OB Figure 32 CH3 1 Mg 10: II CH-CH-C-CH3 CI CH-CH-C-CH3 -> 2 H* CH3 CH-CH-C-CH3 %3D CH-CH-C-CH CH3 D. 101 %3D CH-CH-C-CH CH-CH-C-CH, B.
- 21. Which of the following is the correct reaction intermediate? HCI, CH3OH Meo OMe intermediate НО Он нО ОМе OMe OH OMe a. b. C. d. e.N 1Doubling the concentration of potassium hydroxide in Question # 24 causes: C'a. The reaction rate to be cut in half C b. The reaction rate to double C c. No effect on reaction rate C d. The reaction mechanism to change КОН CH,CH2NH2 - CH=CH, heat КОН b. CH,CH,OTOS CH=CH2 heat a.
