he following alkene undergoes hydroboration-oxidation to yield a single product rather than a mixture. Explain the result, and draw the product show- ing its stereochemistry.
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- Draw the main organic products of the reaction. Indicate the stereochemistry, including all hydrogen atoms, at each stereocenter. Omit byproducts such as salts or methanol.Friedel–Crafts alkylation of benzene with (R)-2-chlorobutane and AlCl3 affords sec-butylbenzene.a. How many stereogenic centers are present in the product?b. Would you expect the product to exhibit optical activity? Explain, with reference to the mechanism.Draw the products formed by the following acid-base reaction without consideration of the equilibrium position: You do not have to consider stereochemistry. You should include all products. Include counter-ions, e.g., Na+, I-, in your submission, but draw them in their own separate sketcher. Separate structures with + signs from the drop-down menu.
- Draw the arrow-pushing mechanism and propose the products. When appropriate, make sure to indicate the appropriate stereo-/regio-chemistry of the product(s). Note that the mechanism(s) by which the product(s) form in reactions A and B are shown in pink. For Reactions C, D, and E you need to deduce the mechanism by carefully analyzing yout reagents and conditions.The following alkene is treated with one equivalent of N-Bromosuccinimide in dichloromethane in the presence of light to give bromination product(s). Draw a line-angle formula for each product formed.While dehydrating 2-Methlycyclohexanol to 1-Methlycyclohexanol, and 3-Methlycyclohexanol 1)what is the common problem associate with E1 reaction? Discuss the intermediate. 2) Briefly compare and contrast E1 vs E2 Elimination reactions. INclude details such as speed of the reactions in relation to each other, rate-determining steps (E1), and stereochemical requirements (E2). Mention whether the steps of the reactions are reversible and discuss the conditions that can drive the equilibrium to favor product formation.
- The hydroboration–oxidation of internal alkynes produces ketones.(a) When hydroboration–oxidation is applied to but-2-yne, a single pure product isobtained. Determine the structure of this product, and show the intermediates in itsformation.(b) When hydroboration–oxidation is applied to pent-2-yne, two products are obtained.Show why a mixture of products should be expected with any unsymmetricalinternal alkyne.The bicyclic heterocycles quinoline and indole undergo electrophilic aromatic substitution to give the products shown.(a) Explain why electrophilic substitution occurs on the ring without theN atom for quinoline, but occurs on the ring with the N atom in indole. (b)Explain why electrophilic substitution occurs more readily at C8 than C7in quinoline. (c) Explain why electrophilic substitution occurs morereadily at C3 rather than C2 of indole.Please provide a curved-arrow mechanism for the following reaction. Be sure to use your mechanism and a few words to explain the regiochemistry of the bromines in the final product and why each carbocation intermediate in your mechanism is the preferred intermediate for that step. Include ALL lone pairs and formal charges. Thank you.
- Arrange the following alkyl halides in increasing reactivity in E2 reaction. Write 1 for the least reactive, then 2 and 3 for the most reactive Answer: A. _____ B. _____ C. _____Each of the following reactions has been reported in the chemical literature and proceeds in good yield. What are the principal organic products of each reaction? In some of the exercises more than one diastereomer may be possible, but one of them is either the major product or the only product. For those reactions in which one diastereomer is formed preferentially, indicate its expected stereochemistry.Based on your answer to parts A - C, draw the correct regio- and stereoisomer of the product in the space provided. Provide a systematic name of the substrate. Provide a systematic name of the product (see section 8.3 for alkene nomenclature). Draw a transition state structure of the reaction with partial bonds and partial charges indicated. Draw an energy diagram for the E2 reaction on the previous page. Your reaction coordinate diagram should: Include structures of starting materials, products, and transition states at correct relative energies. Indicate the activation energy of the rate determining step and whether the reaction is endothermic or exothermic.