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- PleaseComplete the synthetic sequence below by providing the structures of the reaction (questions 7-8). 1 mole of HOCH,CH,OH/H > B 1. LIAIH, 1.03 H* 2. Zn/H 2. Н.О. What is the structure of B? HO. (A) (D) OH8) Do you expect the following reaction to go to completion? Why or why not? Explain R-COCH 3 + NaCl ?
- 6. Complete the following reaction scheme (g) CH H3C. 1) 9-BBN CH 2) H-О, NaOH (h) H20, H,SO4. HØSO4 (i) 1) BH3 2) H2O,, NaOH1. How could you fix the reaction below so that it gives the desired product? ( OH 1. Mg, EtO CH3 2. HC, Н,О Not Observed7. The following scheme shows the intermediates in the mechanism for the synthesis of isoamyl acetate, an ester with a characteristic banana flavor. Classify steps 1, 2, 3, and 4 as addition, elimination, substitution, or acid base reactions. lo ОН gor H2SO4 2 HO HO QH₂ H2SO4 1 .H ОН له عليه ملا 4 HO 3 لیڈ جل OH HO OH + H2O H
- Consider the following reaction: КОН + KBr Br OH a) Does the reaction proceed via an SN1 or Sw2 mechanism? b) Write out the mechanism for the reaction using curly arrows to show the formation of the product from the starting material. c) What general solvent type is best to use for this reaction? d) Give a real example of such a solvent. e) What would happen to the rate of the reaction if you doubled the concentration of KOH?In the reaction from compound 10 to compound 11, why the C=C bond is retained and is not hydrogenated? f) LiAlH4, Et2O, 08C; g) Ac2O, py, DMAP, CH2Cl2, RT, 77% over 2 steps;I was super excited to get into the lab and make compound B from Compound A. I refluxed compound A in water and crossed my fingers. Son of a .... it turned out I made Compound C. What kind of reaction was this? Should I have used NaOH in water instead? $=$ H₂O Br OH B НО. 88
- 7. The reaction of methoxide anion with bromoethane to yield the ether ethyl methyl ether and the bromide anon (Br-) is an excellent example of a general reaction type called Sy2 (substitution nucleophilic bimolecular): CH,0+ CH,СH-Br a CH3-0-CH,СH; + Br- a. Change in enthalpy is -103 kJ/mol; the change in entropy is + 0.025 kJ/mol-K. Calculate DG at 300K. b. Is the reaction endergonic or exergonic? c. Is the reaction endothermic or exothermic? d. Use curved arrows to show the complete mechanism. Reaction of 2-methyl-1-butene with H-Cl could yield TWO alkyl chloride products. Draw and name 8. them.18. What is the product of the following reaction sequence? 1. CH,CH,ONa 2. (CHa CHCH,Br 3. H". H0, heat CH,CH,OCH,COCH,CH, (A) (C) CH но OCH,CH (B) (D) Br. OH HO, 19. Predict which of these reactions would be most likely to occur in the forward direction. (A) RCOCH, NHCH, RCNHCH, . OCH, - (B) RCOH CI RCI "OH (C) RCOCH, "SH RCSH OCH, (D) RCOH ROOCH, OH 20. What is the major product of the reaction shown? CH,OH OH OCH, H но (A) OCH, (C) OCH OH CH ÓCH, OH HO OH OH (B) (D) OH OH KOCH YOCH, OCH, OH OCH, CH,0 CH,Ó(a) Under certain conditions, the reaction of 0.5 M 1-bromobutane with 1.0 M sodium methoxide forms 1-methoxybutane at arate of 0.05 mol>L per second. What would be the rate if 0.1 M 1-bromobutane and 2.0 M NaOCH3 were used?