2. Consider the following reaction OH + PPO OH a. Draw the resonance structures of the intermediate that is formed after the benzene ring reacts with the allylic carbocation. b. Provide arrow-pushing mechanism for the formation of the product from the intermediate formed in part a.
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- A benzene ring alters the reactivity of a neighboring group in the so-called “benzylic” position, similarly to how a double bond alters the reactivity of groups in the “allylic” position. Benzylic cations, anions, and radicals are all more stable than simple alkyl intermediates. a) Use resonance structures to show the delocalization of the positive charge, negative charge, and unpaired electron of the benzyl cation, anion, and radical.6. Complete this multi-step reaction sequence on paper: Convert 2-pentanol into 2,3-dibromopentane. Draw structures of the starting material (2-pentanol) and final product (2,3-dibromopentane), and show the two reactions needed for this synthesis. Include the structure of the intermediate compound, and the reagents and conditions for each reaction. Then explain why 1,2-dibromopentane would not be a significant product of this synthesis.Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 1-methylcyclohexanol as the major product. • You do not have to consider stereochemistry. • You do not have to explicitly draw Hatoms. • If more than one structure fits the description, draw them all. • 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. ● 8) *9.8 MUIT / ? ChemDoodle [ ] remove
- For each horizontal row of substituted benzenes, indicatea. the one that is the most reactive in an electrophilic aromatic substitution reaction.b. the one that is the least reactive in an electrophilic aromatic substitution reaction.c. the one that yields the highest percentage of meta product in an electrophilic aromatic substitution reaction.For each horizontal row of substituted benzenes, indicate a. the one that is the most reactive in an electrophilic aromatic substitution reaction. b. the one that is the least reactive in an electrophilic aromatic substitution reaction. c. the one that yields the highest percentage of meta product in an electrophilic aromatic substitution reaction.Wittig reactions with the following -chloroethers can be used for the synthesis of aldehydes and ketones. (a) Draw the structure of the triphenylphosphonium salt and Wittig reagent formed from each chloroether. (b) Draw the structural formula of the product formed by treating each Wittig reagent with cyclopentanone. Note that the functional group is an enol ether or, alternatively, a vinyl ether. (c) Draw the structural formula of the product formed on acid-catalyzed hydrolysis of each enol ether from part (b).
- Write a mechanism that accounts for the formation of ethyl isopropyl ether as one of the products in the following reaction. A. Write the mechanism for step one of this reaction. Show lone pairs and formal charges. Only the acidic hydrogen should be drawn out with a covalent bond. B. Write the mechanism for step two of this reaction (where the product of step one reacts with the solvent, ethanol). Show lone pairs and formal charges. Only the acidic hydrogen should be drawn out with a covalent bond. C.Write the mechanism for the last step of this reaction (formation of ethyl isopropyl ether). Show lone pairs and formal charges. Only the acidic hydrogen should be drawn out with a covalent bond. Cl- will act as the base in this reaction.1. The alkene mixture obtained on dehydration of 2,2-dimethylcyclohexanol contains a significant amount of 1,2-dimethylcyclohexene a. Draw the structure of 1,2-dimethylcyclohexene b. Show a mechanism for the formation of this alkene product c. Draw the structures and give the names of any other alkene products, explaining how they could arise from the dehydration reactionElectrophiles for the electrophilic aromatic substitution reactions have to be very strong to react with the stable aromatic rings. A nitronium ion is needed for nitration of aromatic rings. Complete the mechanism of the formation of the nitronium ion from concentrated nitric acid in concentrated sulfuric acid
- 2. Check the reaction given below. Benzoic acid is synthesized from benzene. Suggest a synthetic route from benzene to benzoic acid with the reactions you learn in electrophillic aromatc substitution reactions. PS: This is not a one step reaction !!! .COOH 3. You all know the carbonyl structure. It is carbon atom double bonded to the oxygen atom. a. Draw the dipol moment of the carbonyl structure. b. Here are two different carbonyl bearing molecules. With the knowledge you learned so far explain which one is more stable and why? CH3 H3C H3C b. а. 4. Is it possible to achieve this reaction directly? Explain your reasons. *CH32. Prepare the following compound start from 1-methylenecyclopentane, 1-pentyne, and any other reagents you may need.Draw a structural formula of an alkene or alkenes (if more than one) that undergo acid-catalyzed hydration and without rearrangement give 1-methylcyclohexanol as the major product. • You do not have to consider stereochemistry. • You do not have to explicitly draw H atoms. • If more than one structure fits the description, draw them all. • 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. ● AAVII -85 ? ChemDoodleⓇ Y [F
