2. Write structural formulas for the products you expect from Friedel-Crafts alkylation or Acylation of benzene with O a) (CH3)3CCCI b) b) CH3CH2CH2Cl CI c) CHCH3
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- Which of the following best describes a key step in the mechanism for the reaction below? HO, ... -CH3 -CH3 + en dihydroxylation H3C- H3C- OH (A) free-radical substitution at the carbonyl carbon B elimination reaction by abstraction of a beta-hydrogen nucleophilic attack by an alkene to form a cyclic (epoxide) intermediate electrophilic addition reaction to form a carbocation intermediateWhich is the MAJOR product of the following reaction? Et 1) BH3:THF 2) H2O2, NaOH Which of the following best describes a key step in the mechanism for the reaction below? HO ... CH3 -CH3 dihydroxylation + en H3C- H3C- HO. electrophilic addition reaction to form a carbocation intermediate B nucleophilic attack by an alkene to form a cyclic (epoxide) intermediate elimination reaction by abstraction of a beta-hydrogen D free-radical substitution at the carbonyl carbon Which alkene will produce the HIGHEST yield of the alkyl halide below? Br. alkene HBr |Br Brz CH3 CH3 H3C CH2CI2 H3C Br Electrophilic addition of bromine, Br2; to alkenes yields a 1,2-dibromoalkane. The reaction proceeds through a cyclic intermediate known as a bromonium ion. The reaction occurs in an anhydrous solvent such as CH,Cl). In the second step of the reaction, bromide is the nucleophile and attacks at one of the carbons of the bromonium ion to yield the product. Due to steric clashes, the bromide ion always attacks the carbon from the opposite face of the bromonium ion so that a product with anti stereochemistry is formed. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions Br: :Br: .CH3 H3C H3C CH3 Br:
- i would like to request expert to give a detailed drawing of the mechanism yea including all the arrows and etcPossible alternative brominations include: Veratrole (1,2-dimethoxybenzene) to 1,2-dibromo-4,5-dimethoxybenzene; 4-Methylacetanilide to 2-bromo-4-methylacetanilide; 2-Methylacetanilide (made in experiment S.1) to 4-bromo-2-methylacetanilide; Vanillin to 5-bromovanillin; Acetanilide to 4-bromoacetanilide; a. b. C. d. e. EXPERIMENT S4: BROMINATION OF AROMATIC COMPOUNDS Certain other acetanilides made in experiment S.1 may also be used as precursors in this experiment. Estimated time: 1 afternoon Associated learning goals: Section 6, LG 6.6; Section 7, LG 7.2 and 7.4 Pre-lab report: complete the standard report form, and answer the following questions. In this experiment, molecular bromine (Br2) is generated from the redox reaction of potassium bromate with hydrobromic acid. Write a balanced equation for this process. Briefly outline the mechanism by which Br2 brominates your aromatic compound. Why do the bromine atoms end up at the positions indicated rather than anywhere else in the…Identify the major product of the following: C6H5MgBr then H3O+ hydrazine, H₂NNH₂ KOH PCC,CH₂Cl₂ LiAlH4 then water H Benedict's solution H -CH₂OH Choose... Choose... 1,1-diphenylethanol benzoic acid 1-phenylethanmine propylbenzene cyclopentanaldehyde No reaction 1-phenylethanol propanoic acid propan-1-ol cyclopentanecarbaldehyde OnG09... Choose... Choose... 4 <
- 2. Isomerization of alkenes can be achieved through conjugate addition of nucleophiles. Examine the reaction below and answer the questions that follow: i) ii) iv) blogg Starting Alkene Alkene Product Give the chemical structure of the Alkene Product that is formed (NB: Show and label the geometry of the Alkene Product). Explain why geometry given in i) above is preferred. What is likely to be the geometry of the Starting Alkene? Give the full mechanism through which the isomerization is likely to occur.2. Isomerization of alkenes can be achieved through conjugate addition of nucleophiles. Examine the reaction below and answer the questions that follow: i) ii) iv) bigg Starting Alkene Alkene Product Give the chemical structure of the Alkene Product that is formed (NB: Show and label the geometry of the Alkene Product). Explain why geometry given in i) above is preferred. What is likely to be the geometry of the Starting Alkene? Give the full mechanism through which the isomerization is likely to occur.Draw a structural formula for the enol form of the carbonyl compound
- How is the mechanism for oxymercuration/demercuration reactions of alkenes understood? How are the (Markovnikov) products predicted and what reagents would you need to use to incorporate this reaction into a multistep synthesis strategy. Finally, what makes this a potentially more useful way to synthesize alcohols from alkenes than simple acid hydration?Which of the following is the best choice to prepare the following alkene using the Wittig reaction? 1) ethanal and 2-bromopentane/PPH3 2) propanal and 2-bromopentane/PPH3 O 3) 2-pentanone and 1-bromopropane/PPh3 O 4) 2-pentanone and 2-bromopropane/PPh3 5) butanal and 2-bromopentane/PPH3A problem often encountered in the oxidation of primary alcohols to acids is that esters are sometimes produced as by-products. For example, oxidation of ethanol yields acetic acid and ethyl acetate: Propose a mechanism to account for the formation of ethyl acetate. Take into account the reversible reaction between aldehydes and alcohols:
