Which of the following statements are true? Check all that apply. (CCB, McMaster University) A) A reaction between (H3C)3C-Br and CI will go through a 2-step mechanism. B) SN1 mechanisms occur preferentially with more highly substituted alkyl halides. C) Curved arrows show electron flow from an electrophile to a nucleophile. D) SN1 mechanisms have two species involved in the rate-limiting step.
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- This question has multiple parts. Work all the parts to get the most points. The following reaction occurs in two steps. HI Predict the organic intermediate(s) and product(s), and provide the mechanism for the reaction. a.1 Draw the organic intermediate formed after the first step of this reaction. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. • You do not have to consider stereochemistry. Do not include counter-ions, e.g., Na+, I-, in your answer. • Do not include lone pairs in your answer. They will not be considered in the grading. Ө ? ChemDoodle >3) Use the reaction shown below and the associated reaction energy diagram to answer the following questions. E A Но- + Br HO. Br- reaction coordinate a) In the space above, use curved arrows to show the mechanism of the reaction. b) Classify the reaction as either addition, elimination or substitution. c) In this reaction is hydroxide (HO-) acting as a nucleophile or as a base? c) Based on the reaction energy diagram, is the reaction endergonic or exergonic? d) Based on the reaction energy diagram, and assuming the reaction is reversible, would the equilibrium lie to the left or to the right? e) Which position on the reaction energy diagram (A, B or C) corresponds to the transition state?H₂C H H₁C Br NBS CH, CH₂ CC, hv **You may assume that Br-Br is formed by a side reaction that occurs (which we discussed in class). This is useful for one of the steps of the mechanism.
- a) Draw the structure of alkene and proposed reagent(s) used to prepare the product in Reaction A. Draw the reaction mechanism for first image b) Predict the molecular structure of the major product(s) of Reaction B and C with second image c) Rank the following compounds from the lowest to highest boiling point. Explain your answer briefly. A: 1-Butanoic acid; B: 1- Butanol; C: 1-Butane d) Draw any three alcohol isomers with molecular formula of C4H10O. e) Based on isomer structures you drawn in part (d), draw the final oxidation product(s) (by KMnO4/H+) of any two isomer, respectively.4. Complete the phrases with one or more of the following terms: SNI, SN2, E1, E2. a) The reaction takes place in two or more steps. b) The reaction goes through a carbocation. c) The rate determining step has two reactants. d) The rate is independent of the concentration of nucleophile or base. e) Zaitsev's rule is often applicable to the products..1.) Draw the least stable resonance form for the intermediate in the following electrophilic substitution reaction. N N Br₂/FeBr3 • You do not have to consider stereochemistry. • Include all valence lone pairs in your answer. • In cases where there is more than one answer, just draw one. [Review topics] 2.) Draw the most stable resonance form for the intermediate in the following electrophilic substitution reaction. [References OH OH Br₂ You do not have to consider stereochemistry. • Include all valence lone pairs in your answer. • In cases where there is more than one answer, just draw one. Br 'Br
- HBr can be added to an alkene in the presence of peroxides (ROOR). What function does the peroxide serve in this reaction? A) nucleophile B) electrophile C) radical chain initiator D) acid catalyst E) solventDraw the electron-pushing mechanism for the propagation steps of the allylic bromination reactions below. You may omit NBS in your mechanism, and use Br and Br2.I. Complete the following statements about mechanisms, bases, and nucleophiles. a) The SN2 mechanism reaction requires a b) The E2 mechanism reaction requires a c) A poor nucleophile makes what mechanism UNlikely? d) A weak base makes what mechanism UNlikely? e) If you determine the SN2 and E2 mechanisms are unlikely, what are you left with?
- I am studying so much but I am not sure if these are correct. Can you go over it plsss? A Hoffmann product is O the result of the fastest mechanistic process. the most highly substituted alkene possible. the same as the Zaitsev's product, but the term "Hoffmann" is used for E2. the most stable alkene. What does Zaitsev's rule state? As the degree of substitution around the C=C of an alkene decreases, the stability of alkene increases. None of the statements is correct. O As the degree of substitution around the C=C of an alkene decreases, the stability of alkene decreases. As the degree of substitution around the C=C of an alkene increases, the stability of alkene decreases.Choose the major substitution and elimination products. Check all that apply. л ি CH₂OH/H₂ODraw the predominant product(s) of the following reactions including stereochemistry when it is appropriate. H₂C HC-CEC-CH₂ + 1 HCI H₂C • Consider E/Z stereochemistry of alkenes. Do not show stereochemistry in other cases. • If no reaction occurs, draw the organic starting material. • Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right . . corner. Separate multiple products using the + sign from the drop-down menu. ** CP ChemDoodle (F Previous