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- 1. An SN2 reaction exhibits second-order kinetics. What happens to the rate of an SN2 reaction under each of the following conditions? iv. [RX] is halved and [Nu:] is doubled. v. [RX] is doubled and [Nu:] is halved.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 stateWhich SN2 reaction will occur most rapidly? (Assume the concentrations and temperatures are all the same.) CH A CH,0 + + CI- B CH,0 CH3 CH,0+ +F CHO CH, Br Br
- 2. A reaction similar to #1 is below, however it reacts at a much slower rate, give 2 reasons why and explain. Br ОН 0 °C4. Rank the following reactions in terms of rate for an SN2 reaction (1 = fastest reaction). Are any of these reactions not possible? Br OH NaOH NaOH OMS NaOH NaOHFor the following reaction there are three (3) possible products. Two of the products are expected to be minor and one product is expected to be a major product. Br H₂O Name and draw out the step-by-step mechanisms by which each of the products is formed. Briefly explain why one of the three products is expected to be a major product.
- Which of the following reaction coordinate diagrams represents SN1 and E1 reactions? A B C DWhich SN2 reaction will occur most rapidly? (Assume the concentrations and temperatures are all the same.) * CH;0 CH3 CI + CI CH,0 + CH + I CH3 C CH;O¯ + + F CH D CH,O Br + BrDetermine the major thermodynamic and kinetic products in the following reaction. Br₂
- Which will undergo carbocation rearrangement? 1 2 O 1 and 3 only O 1 and 2 only 2 only O 3 onlyWhich of the following is most reactive under E2 conditions? Br Br Br Br (A) (B) (C) (D) O Compound B OCompound C Compound A Compound DThe rate law for the reaction of HO- with tert-butyl bromide to form an elimination product in 75% ethanol/ 25% water at 30 °C is the sum of the rate laws for the E2 and E1 reactions. What percentage of the reaction takes place by an E2 pathway when [HO-] = 5.0 M? (k2 = 7.1 x 10-5, and k1 = 1.5 x 10-5)