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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- 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.Electrophiles 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
- Write the mechanism for the reaction of 1-butanol with HBr and include a brief explanation of the following points related to the mechanism. Briefly explain why this reaction requires acidic conditions (comment on the leaving group). A Explain briefly why this reaction proceeds via the SN2 mechanism, rather than the SN1 mechanism.The question is: "Draw the curved arrow mechanism for the reaction between pentan-2-one and (CH3)3O– in t-butanol to form an enolate. Draw all electrons and charges on both resonance structures. Then answer the question about the reaction." I got the initial arrows correct, but am not entirely sure what the carbanion intermediate would look like and then what the curved arrows would be to convert it to its final oxanion form4. Draw the structure of the phosphorus ylide and carbonyl compound which may be used to make the alkene shown below.
- Write the structural formula of the organic product for the given reaction between an alkyne and an alkyl halide. The alkyne group is shown and should be entered as "CC" without the triple bond. Enter C before associated H atoms (e.g., CH3CH2CH2OCHCHCH2). CH3CH2CH2CCH 1. NaNH, 2. CH3CH2BrQUESTION structure of the final products A and B. Provide a complete mechanism with arrow pushing The two reactions below give slightly different products. Show the showing the intermediates and all resonance forms for one transformation. Explain the differences between the two reactions. HCI (cat) CH2CH3 CH3OH (excess) Зда HCI (cat) B CH2CH3 CH CH2OH (excess)Draw structures for all mono-chlorinated products formed from the radical chlorination of pentane. Under each structure, indicate the class of hydrogen replaced (i.e., 1°, 2° or 3°) to form this compound and write its IUPAC name.
- 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 the structures of the two carbocation intermediates that might form during the reaction of 2-methylpropene (above) with HBr.a) Free radical bromination is more selective than free radical chlorination. Draw a reaction coordinate diagram for the specific step in the radical chain mechanism that illustrates the source of this selectivity, and explain your reasoning. b) Explain why the bond dissociate energy (BDE) of tert-butane is 95 kcal/mol while the BDE for propane is 99 kcal/mol.