2. A. Rank the following compounds by the rate of SN1 reactivity. Molecule that reacts fastest with SN1 reaction is 1 while that the slowest is 5 ÇI Br 父
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Q: Which alkene reacts faster with HBr? Explain your choice.
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Q: What happens to the rate of an SN1 reaction under the following conditions? [RX] is halved, and…
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Q: D ОН ČI
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Q: Which reaction is predicted to be faster (A or B)? Reactions A and B are of the same type. Classify…
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Q: Arrange the following compounds in their ease of undergoing an SN2 reaction: a) CH3CH2CH2-CI b)…
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Q: 10. Arrange each set of compounds in order of reactivity towards E2 process: Br Br Br CI (a) (b)
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Q: Although there are nine stereoisomers of 1,2,3,4,5,6hexachlorocyclohexane, one stereoisomer reacts…
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Q: Which alkene reacts faster with HBr? Explain your choice.
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- 7. Reaction Scheme. NH₂ NH2 or two differnet methods (no same steps/reagents) C5H12N2 1. xs Mel, xs K2CO3 2. Ag2O, H₂O 3. heat Br2, xs NaOH, xs H₂O OHC 1.03 2. DMS CHO4. Which one of the following compounds will react faster by SN1? PhBr PhCH2Br PHCH= CHBr MezCBr Ph:CBr A EThe substitution of an Iby a Clon H3C-I can occur by two possiblemechanisms:Mechanism I: step 1. H3CI → H3C+ + I- slow stepstep 2. H3C+ + Cl- → H3CCl fast stepMechanism II: step 1. H3CI + Cl- → H3CClI slow stepstep 2. H3CClI → H3CCl + I- fast stepa.) Write a rate law for each reaction.
- 5. Which of the following statements regarding the reactions A and B (shown below) is the best? 0 heat 0 heat B A . Both reaction A and B are feasible because frontier orbitals of reactants can overlap in-phase, allowing the simultaneous formation of two o bonds. . Both reaction A and B are NOT feasible because frontier orbitals of reactants can NOT overlap in-phase. Only reaction A is feasible because frontier orbitals of reactants can overlap in- phase, allowing the simultaneous formation of two o bonds. Only reaction B is feasible because frontier orbitals of reactants can overlap in- phase, allowing the simultaneous formation of two o bonds.3. The following three SNAR transformations follow different mechanisms. Draw an intermediate or transition state for each reaction that relates the correct mechanism. Write a short sentence as to why that is the correct intermediate for the reaction. Reaction 1: Reaction 2: NO2 NO2 NO₂ + NaOMe NO2 + NaOH2 1. aq NaHCO3. 100 C 2. H₂O+ OMe NO2 NO₂ OH ŇO₂ NO2 Reaction 3: CFa Br CF3 8--2 + NaNH2 NH3 NH₂ Intermediate/transition state Intermediate/transition state Intermediate/transition state2) Rank these molecules by their SN2 reaction rate. If a difference in reaction rate is hard to predict, you may group molecules with similar reactivity. CI CI Br CI CI A D E B
- 6. For each reaction indicate the predominant mechanism: S,1, S,2, E1, or E2. (a) (b) (c) OH H* H* H* ? ? ? A. A OH OH (d) Br (e) .CI NaBr CH,OH DMSO dilute (CH),COK (9) OTs ? OTs (CH),COH EthanolUse the E2 mechanism to explain why when I is mixed with sodium ethoxide (NaOEt) in ethanol, the major product is III, but when II is mixed with sodium ethoxide in ethanol, the major product is IV. H3C CH3 H3C CH3 ..CI CI CH3 I CH3 || H3C. CH3 H3C CH3 E ||| CH3 CH3 IV SANDraw all the possible constitutional isomers for the molecular formula C4H8Br. Rank them according to their reactivity (i.e. rate) in SN2 reactions.
- Which of the following represents the transition state of the rate- determining step in the reaction between 2-bromopropane and sodium methoxide leading to elimination? H;C H;C CH, S0----H----CH2 CH3 -Br -Br 2 H3C CH, Br H3C CH: ---Br 3 H3C а. 1 b. 2 с. 3 d. 4How many transition states and intermediates would the reaction profile have for the reaction shown below?3. Review free radical addition of HX to alkenes. Draw the favored product in each reaction below. Which reaction is faster? Justify your answer. H₂N HO HCI, ROOR HCI, ROOR