6) Complete the following mechanism. (D and SN2) H Br. NaH "H: 7) Complete the following mechanism. (D and SN2) [1 0: H NaH "H: " Br. SN2 Good Nucleophile SN2 ether
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- b) Explain in detail what characteristics of the alkyl halide influence whether a mechanism will be SN1 or SN2. c) Explain in detail what characteristics of a nucleophile influence whether a reaction will be SN1 or SN2.1. For the reaction in Fig. 9 draw the curved arrows and the structure of the transition state. H to Figure 9: Draw curved arrows and the structure of TS H₂O محمد OO-H.0. For 0.1 M equimolar reaction of CH3COOH + NH3 ----> CH3-CO-O™ + NH4+ How does the concentration of ]? [CH3COOH] compare to that of [CH3-CO-O (a) Equal (b) Greater than (c) Less than) (d) not possible determine a
- 5) For the following multi-step reaction involvling a carbocation Overall Transformation CH3 CH3 H-Ci: CH3.. rearrangement, draw mechanism each -C : arrows to show how intermediate is formed and fill in the blanks for the types of elementary 丰 steps that are involved in this overall Stepwise Mechanism transformation. H. CH3, CH3 Step 3: Formation (fill in the blank) What is the driving force for Step 2 in problem #5? H-Ci: H. H-CI: CH3 CH3 Step 1: Addition (fill in the blank) Step 2: Shift (fill in the blank)1. SN1 or SN2 2. Include major product and stereochemistry 3. Add detailed reaction mechanismsfinal product. b) Draw the correct first step and complete the mechanism, showing the structure of the HO: H. H. НО-Н H. H. .. reaction. H. H a) Explain why the following mechanism is not plausible for the first step of this 2. Consider the following reaction:
- 1. What is the major organic product generated in the reaction sequence below? (A) ...OH CH3 (B) CH3 OH |||||CH3 "||||||OH 1. H₂SO4/ heat 2. Hg(OAc)2 / H₂O 3. NaBH4 (C) |||||CH3 OH (D) OH CH3(7) Rank the following nucleophiles in order of their reactivity in an SN2 reaction (1 - most reactive.4 - least reactive). REMEMBER: The SN2 reaction has a crowded transition state! H,C-o3) Explain how and why the reaction below results in the observed regiochemistryand/or stereochemistry.
- 149) Why is a tertiary alcohol more reactive with hydrogen halides, than secondary alcohols? Because secondary alcohols are smaller and therefore less reactive for the attack of halide nucleophile. Because tertiary alcohols have more hydrogen atoms available for substitution reactions. Because a tertiary alcohol can form a more stable carbocation as an intermediate in the reaction. Only the 1st and the 2nd statements are acceptable.Predict the product of this E2 elimination reaction. ||| Brill.... H3C Ph Ph H3C Ph Ph Ph CH3 || reaction H3C Ph IV CH3 NaOCH3 Ph H3C Bril... Ph CH3 Ph CH₂ PhQuestion 5. (20 points) Consider the following reaction. + PhLi (2 eq.) then water a) Propose a structure for the final product. b) Give a complete mechanism for the transformation. c) Draw an energy diagram of the transformation and briefly comment on the relative energies of the starting material, final product, and any intermediate(s), and about the rate determining step.