6. Show the complete mechanism for the following aromatic substitution reaction. Use curved arrows to indicate the direction of electron flow. NH2 Br O,N. ZON' O,N NO2 NaNH,/NH3 NO2 NO2
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- This reaction does not follow the expected theory. Given what you know about substitution/elimination, what is the expected mechanism this reaction should follow? Suggest why that is not what happens and give the actual product of the reaction. Br ткон sWhat is the rate-determining step in the mechanism of an electrophilic substitution reaction of benzene? Select one: OA. Attachment of the electrophile to benzene ring. OB. Bonding of catalyst to electrophile precursor. O C. Reformation of acid catalyst. OD. Formation of the electrophile. OE. Loss of H+ ion form arenium ion intermediate to reform aromatic ring.The first reaction can lead to over substitution. In the second reaction, no over substitution is observed. In 4 sentences or less, provide a reasonable explanation for this observation. AICI3 over substitution product AICI3
- Choose the reagent(s) that would be most likely to complete this reaction. I||| / A B C D 1. BH3-THF 2. H2O2, NaOH Br₂ H₂O OsO4 (catalytic) NMO RCO3H DoneOnly one of these statements about nucleophilic aromatic substitution is true. O as the number of ortho and para electron withdrawing groups increases, the reaction rate decreases O the reaction proceeds by an addition-elimination mechanism the reaction involves a carbocation intermediate with delocalization of electrons all are falsePredict the products/intermediates of the following nucleophilic substitution reactions. ... NaN3 Ph acetone intermediate DCM, rt (2 products) Br PHSH (2 products) OBoc PhMgBr CuBr OMe
- [Review Topics] [References] Acyl transfer (nucleophilic substitution at carbonyl) reactions proceed in two stages via a "tetrahedral intermediate." Draw the tetrahedral intermediate as it is first formed in the following reaction. H3C CH3 H2O NaOH • You do not have to consider stereochemistry. • Include all valence lone pairs in your answer. • Do not include counter-ions, e.g., Nat, I', in your answer. • In cases where there is more than one answer, just draw one. C opy aste C. Previous Next Email Instructor Save and Ex Cengage Learning | Cengage Technical Support 5:48 PI 82°F 3/28/20Identify the best conditions to complete the SN2 reaction shown below. N3 A) CHI, THF B) NaCN, DMSO C) NaN», ethylamine D) KI, THF E) NaN, DMFReview topics] [References) 1. CI NaOH NH2 NaCI H20 2. OH NAHCO3 12 H20 CO2 Nal a = Proton transfer d = Electrophilic addition g = SN1 Nucleophilic substitution b = Lewis acid/base c = Radical chain substitution e = El Elimination h = SN2 Nucleophilic substitution f= E2 Elimination Identify the mechanism by which each of the reactions above proceeds from among the mechanisms listed. Use the letters a - i for your answers. 1. 2. Retry Entire Group 9 more group attempts remaining nswer
- Acyl transfer (nucleophilic substitution at carbonyl) reactions proceed in two stages via a "tetrahedral intermediate." Draw the tetrahedral intermediate as it is first formed in the following reaction. H3C. ... NH2 HCI/H₂O reflux • You do not have to consider stereochemistry. • Include all valence lone pairs in your answer. • Do not include counter-ions, e.g., Na+, I, in your answer. • In cases where there is more than one answer, just draw one. + 4 n [ ?3. Nucleophilic aromatic substitution (NAS) reactions have the opposite trend in terms of reaction rate when compared with SN2 reaction rates. This is to say that aromatic fluorides undergo substitution the fastest under NAS conditions but the slowest under SN2 conditions. Using your knowledge of the mechanisms of these reactions, explain why this is the case. (Hint: It is important to consider the rate-determining step of each mechanism). NuO Nu Rate of reaction follows the following trend: F> CI > Br>1 NuO Nu Rate of reaction follows the following trend: I> Br > CI >FFor the given molecule, highlight any nucleophilic sites in red and any electrophilic sites in blue. O: 439 0-H