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- 6. Propose the key transition structure that accounts for the stereoselectivity observed in the following reaction. Ph SPh OCH 3 LiB (Et) 3H Ph OH OCH 3 SPh 92:8 favoring synProvide a plausible arrow pushing mechanism for the reaction below. Hint: NaOBr is in solution along with an excess of NaOH for the first step. 1. еxcess NaOн (ад), Brz OH + CO2 NH 2. acidic workup `NH2Mechanism. Propose a mechanism for the following reaction. Label the rate-determining step and the major resonance contributor. Make sure to include (1) the formation of the electrophile and (2) all significant resonance contributors of the sigma complex intermediate. NO2 H2N H2N. HNO, (1 eq.) H2SO4 O °C CF3 CF3
- The following reaction should under go a(n) H₂C SN1 Br NaSPh DMF A/ reaction.biackboard.gwu.edu/webapPps/assessment/feview/review.jsprattempld Select the major product of the reaction below. 1) TIPSCI, Et3N 2) Na 3) 03, then CH3SCH3 4) CH3CH2LI, then H30* 5) Bu4N* F', H2O CI Selected Answer: Он HO Answers: он он он OH OH OH он Select the major product of the reaction below. The answer is there, but please explain step by step.Draw the curved arrow notation and predict the products when one equivalent of methoxide in DMSO a: rcom ten:perature is sdced to S-brome-1. 1odepentane. Part 1 ht See Periodic Table O See Hint DMSO Draw the curved arrow notation. Part 2 Select the major byproduct. Chooso one: O A, I- O B. HI O C. CH:OH O D Er. O E. Her
- 2. N=N CI Na =&m You & benzene, reflux 1. a = Proton transfer b = Lewis acid/base c = Radical chain substitution d = Radical chain addition 2. HO Br Submit Answer CH3 NaOH CHÍNH e = Electrophilic addition f = E1 Elimination g=E2 Elimination Retry Entire Group 3 more group attempts remaining -N disperse yellow, an azo dye NaBr Identify the mechanism by which each of the reactions above proceeds from among the mechanisms listed. Use the letters a -j for your answers. HO h = SN1 Nucleophilic substitution i = SN2 Nucleophilic substitution j= Electrophilic aromatic substitution Previous Next2. Predict the products of the following reactions, paying careful attention to which FG would react in each situation. Br Br OH OH 1) TsCl, pyridine 2) 1 equiv NaCN MeOH mod. heat Br Br OH OH 2 equiv NaOEt 1) PBr3 2) Nal in DMFOne of the steps in the mechanism of the above reaction as shown below. Draw the structure of all the products of this reaction. com/mm/takeAssignCourt Rotivity.do?locator assignment-take 1 pt ment Eto O Eto O 3. NaOH, H₂O, heat 4. HCI, H₂O, heat One of the steps in the mechanism of the above reaction is shown below. Draw the structure of all of the products of this reaction. O OEt O 1. Eto Na 2 Å OH You do not have to consider stereochemistry. • Draw enolate anions in their carbanion form. . You should include all products. Ôno P Ć [References) . Include counter-ions, e.g., Na, I, in your submission, but draw them in their own separate sketcher. . Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner. . Separate multiple products using the + sign from the drop-down menu. ///-000- IF Previous Email Instructor
- Predict the product for the following reaction. Он он excess K,Cr,0,H,SO,H;0shift Curved arrows are used to illustrate the flow of electrons. Using the provided starting and product structures, draw the curved electron-pushing arrows for the following reaction or mechanistic steps. Be sure to account for all bond-breaking. and bond-making steps. caps lock fn tab 1969 esc control ! 1 Q A 1 option Z a Drawing Arrows @ 2 W S * F2 X 3 H command # E 80 F3 D Br 15 $ 4 C a F4 R F % 5 V stv♫ NA o FS T G Question 16 of 18 6 B F6 Y H & 7 8 F7 34044 U N 8 J D-II FG 1 M ( 9 K Undo DD F9 O Reset 1 H O L Done F10 command P > ; I { [ option + 3 = ? F12 -- I 1 O Drag dThere are be specity missing steps in merhanism which es need to Me Me Nu duoplulie Subslitutiony On Meaction Me' OPP * OPP Me NH2 diphusphate KabA, Mg KabC d-KG Fe baind with got Oa t form R (F2, 0 -Fe speies 2ェ