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- SECTION 6: Show the mechanism of each reactions with arrows and intermediates form as in a. b. C. HBr Br₂ Cl₂, H₂O Br Br CI Br OH18. What is the third intermediate of the following reaction? R shown.) R a. R. b. R 6-0-0- -0-0-6 R ن Na (Sodium cations not R R R R d. e.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
- ide ibong be 2. Consider the following ELIMINATION reaction; a. Write the products(s) III... MeOH b. Write the rate equation for REACTION.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 E21. 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.
- 6. Select the mechanism by which the reactants below will react. NaOCH3 in CH3OH 50 °C a. SN1 b. SN2 c. E1 d. E2D. 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 CH₂CH₂2. The bromination of 2-butene is an exergonic reaction. H3C + HC. CH, Br. CH Br a. Draw the mechanism for the reaction (you may ignore the stereochemistry for this question). b. In the mechanism drawn above, identify any intermediates. Progress of the reaction Progress of the rea ction c. How many transition states are involved in the above mechanism?. Without drawing the transition state(s), indicate where they occur in the mechanism. Each step of the mechanism of reaction involves a transition state, therefore, Here there are two transition states, each with its own activation energy. d. Which of the following reaction co-ordinate diagrams best illustrates this reaction?.Explain briefly, On the diagram, draw the structures of the reactants, products and intermediates at the correct locations on the diagram and indicate which position(s) correspond to the transition Progress of the readion Progress of the reaction state(s).
- Doubling 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.Complete the reactions by predicting the product/s: Zn + 2HC1 –→ ZnH2 + Cl2 b. ZnCl2 + H2 C. no reaction a.3. Use curved arrow to describe reaction mechanisms for the following reactions. a. b. ∞ OH Br AlBr3 H₂SO4 80
