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- 17. Which of the following is a mechanism for an SN2 reaction? III. نعت a. I b. II c. III d. IV e. Both I & II LAM Br CN O + Br IV - Br + BrWhat is the major product of this reaction sequence? 1. ELONA/E1OH 2. ВГCH-CH2CH3 (1 ед.) 3. НО", heat 67. b. C d. ОН HO. dl loExamine each reaction. Determine the mechanism (E1, E2, SN1, or SN2) for each reaction. SN1 E2 E1 SN2 CH2CH3 OocCHa)s CH2CH3 CH2CH3 А. Br major product Br DBU В. OOCH,CH, C. „Br Ooc(CH)a D.
- 6. Draw the major neutral product of each reaction and indicate whether the predominant mechanism is S1 or S2 in each case. A. B. C. D. E. Br Br CI HO NaSMe DMF NaN3 DMF IOH OH KCN THF11. Draw the products for the reactions (SN1, SN2, or E2) (remember that E2 and SN2 can be paired) a. b. c. & MeNLi DMSO t-BuOk DMSO H₂OWhich sequence of reactions can be used to carry out the following transformation? A. B. 1. ia CI, AIC13 2. Cl2, FeCl3 1. Cl₂, FeCl3 2. i₁. AIC AlCl3 CI C. Either D. Neither CI
- Through what mechanism does this reaction primarily proceed? a. SN2 b. E1 c. E2 d. SN128. It is best to carry out the conversion of CH3B to CH3-S-CH3 with the use of the reaction sequence: i) NaSH ii) 12 А. i) NaSH i) NaOH C. iii) CH3Br iv) H2O2 В. i) NASH i) KMNO4 i) NaSH i) NaOH i) CH3Br iv) CH3CO3H D. `Br NaH 29. In the reaction shown above, part of the product shown on the right came from: А. В. C. D. None of these 30. The transformation of 1-bromopropane to 1-butanol may be carried out by which of the reaction sequence? i) Mg i) HCHO ii) H3o* ) Mg i) HC(OC2Hs)s ii) H3O* iv) LIAIH, v) H3O* А. с. i) Mg i) CO2 ii) H30° iv) NABH4 v) H3o* В. D. None of thesec. Snl reactions dominate under polar protic solvents. Increasing the polarity of the solvent will increase the rate of the reaction because the polar solvent will stabilize the dispersed charges on the transition state more than it will stabilize the neutral reactant. Label areas of ô* and & on the molecules of the transition state of the SN1 reaction below: Me Me Ме Me Me H20 Br -Br OH + НО \'H Et Et RDS Et H Et Et transition state not isolable carbocation intermediate not isolable
- What is the product of the illustrated mechanism? A A B B C C D D HAC H₂C A H- ,CH 3 O: H3C. CH3 ? H3C H3C. , CH 3 H3C. H3COH ధర్మం , వ O: HAC H3C P CH3 H B D CH3Which conditions will produce the target product in the highest yield? O A) 1. BH3; 2. H₂O₂, NaOH, H₂O B) 1. OsO; 2. S(CH3)2 C) 1. Hg(OAc)₂, H₂O; 2. NaBH4 D) H₂SO4, H₂O A ? B OH racemic mixtureFor Nos. 63-70 Choose: A -if the indicated property/behavior in item I is greater than in item II B-if the indicated property/behavior in item I is less than in item II. C- if the indicated property/behavior is equal in item I and item II. D- if the indicated data is insufficient to make a comparison.