2. Describe the results of all of these experiments in terms of the concepts of thermodynamic and kinetic control. Assume that the energies of cyclohexanone and furfural are about the same and draw an energy profile for both reactions that would explain the behavior you observed.
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- 1-pentanol + NaBr/H2SO4 -> 1-bromopentane Is this substitution reaction reversible? In other words, would one expect to obtain an equilibrium mixture of the alcohol and bromoalkene at the end of the reaction of would one expect this reaction to go to completion? Justify your answer?In the window below draw the structure of cyclohexyl cyclohexanecarboxylate. You do not have to consider stereochemistry. • In cases where there is more than one answer, just draw one. *** Sn [F ChemDoodleⓇ паAlkenes can be converted into alcohols by acid-catalyzed addition of water. Assuming that Markovnikov's rule is valid, predict the major alcohol product from the following alkene. • You do not have to consider stereochemistry. • In cases where there is more than one answer, just draw one. • Remember to consider hydride and alkyl shifts. Sn [F ?
- The synthesis of carbohydrates can be particularly difficult because of the large number of chiral centers and OH functional groups present. Epoxides can be useful synthetic intermediates in carbohydrate synthesis. Draw the product of the reaction of a phenyl Gilman reagent with this epoxide. A • Use the wedge/hash bond tools to indicate stereochemistry where it exists. • Explicitly define the cis/trans stereochemistry of fused rings using wedge or hash bonds. • If enantiomers are formed, draw both. • Separate multiple products using the + sign from the drop-down menu.1-pentanol + HBr -> 1-bromopentane Is this substitution reaction reversible? In other words, would one expect to obtain an equilibrium mixture of the alcohol and bromoalkene at the end of the reaction of would one expect this reaction to go to completion? Justify your answer?Give evidence, through specific examples (research on the internet), to support the carbocation mechanism. include Markovnikov’s rule and Hammond’s postulate when providing the examples.
- 8. Starting with (2S)-2-bromobutane: ● Draw the Line-Dash-Wedge structure of the reactant (2S)-2-bromobutane. Identify the Stereochemistry of the following four products. Identify the, "Mechanism for Synthesis of the Four Products". The Mechanism is Draw Three-Dimensional Mechanisms for Synthesis of the Four Products. (Reference: Solomons, Chapter 6, Section 6.14, 11th Edition pages 271-274; 10th Edition p 264 -265). :0° H-S: C-Ö: -S: H -Ö: I H II H H IVDraw structural formulas for all of the enol forms of the carbonyl compound below. You do not have to consider stereochemistry. • Consider stereoisomeric enols as a single enol form. • In the case of dicarbonyl compounds, do not include stuctures in which both carbonyl groups are present as enols. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. Separate structures with + signs from the drop-down menu. -85 0 n ChemDoodle > laImagine that phenol (“hydroxybenzene”) and nitrobenzene are reacted (in separate beakers) with a hot solution containing both concentrated sulfuric acid and concentrated nitric acid. A) Phenol reacts much more quickly than benzene, and benzene reacts much more quickly that nitrobenzene. Explain this observation, using at least one appropriate reaction coordinate diagram as part of your answer (be sure to label your reaction diagram with appropriate structures). You do not need to include any complete mechanisms, but you may wish to use portions of mechanisms as part of your discussion.
- The molecule does not react with bromine in chloroform but can be brominated using bromine and FeBr3, and three different monobromo products are obtained. The number of H’s in the compound have to be a multiple of what integer? Explain your answer. The number of C’s in the compound have to be a multiple of what integer? What is the maximum number of C’s that can be in the compound? Explain how you determined the maximum number of C’s in the compound What functional groups are present in the compound (alkyl, aryl, ketone, etc.)? Explain your answer by referring to the information provided above.Preparation of para-iodonitrobenzene 1. Weight of p-nitroaniline = 0.552 g 2. Weight of para-iodonitrobenzene = 0.231 g 3. Theoretical yield = ............................................ 4. Percentage yield = ............................................. 5. Melting point range = .................... 0C.CH₂OCH₂C(CH3) can be synthesized by an S2 reaction. Draw the structures of the alkyl chloride and nucleophile that will give this compound in highest yield. . Use the wedge/hash bond tools to indicate stereochemistry where it exists. • Include all valence lone pairs in your answer. Separate multiple reactants using the+sign from the drop-down menu. . When a metal counterion is needed, use Na", but draw it in its own sketcher. Ⓒ CH₂ 24 Jn (F