6. From what alkyl halides are the following alkenes have been made? CH3 CH3 CH3CHCH2CH2ĊHCH=CH2 7. Which of the two isomers would you expect to undergo E2 elimination faster? trans-1-bromo 4-tert-butylcyclohexane or cis-1-bromo-4-tert-butylcyclohexane? Draw each molecule in it more stable chair conformation. Provide an explanation to your answer.
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- CH3 O O CH3CH₂CHCH₂CH=CHCOH HCI CH3 CHOMO CH3CH₂CHCH₂CH- CHCOH ChemDoodleⓇ CI H CH3 CH3CH₂CHCH₂CH- O CHCOH H CI this product is not observed Account for the fact that this reaction yields only a single product by drawing the carbocation intermediate leading to the observed product. Sty √n [FElimination reactions of cis- and trans-1-bromo-2-methylcyclohexanes with Eto in ETOH could potentially give the two products, 1-methylcyclohexene (1) or 3-methylcyclohexene (2). Which answer (a-d) indicates the major products for each reaction? Br „Br EtO Eto "CH3 ELOH `CH3 *CH ELOH "CH3 cis trans Select one: a. 2 from the cis and 1 from the trans substrate b. 2 both from the cis and trans substrates c. 1 both from the cis and trans substrates d. 1 from the cis and 2 from the trans substratealkyl halide V Br OH Me when treated with NaOH, He E2 elimination only gave a single alkere isomer rotate the newman structure that was drawn down the bond shown by the arrow to show the confirmation of the E2 result, then draw the sole alkene isomer and label it cis or trans isomer
- Draw a structural formula for the major product of the reaction shown. Cl₂ H₂O Show product stereochemistry IF the reactant alkene has both carbons of the double bond within a ring. • Do not show stereochemistry in other cases. If the reaction produces a racemic mixture, just draw one stereoisomer. 8 Sn [F ChemDoodleⓇFor each reaction, decide whether substitution or elimination (or both) is possible, andpredict the products you expect. Label the major products. chlorocyclohexane + NaOC(CH3)3 in (CH3)3COH46. Which alkene below would result in the most regioselective reaction with HCl? Which would result in the least regioselective? oor of ook oor o + 10 20 30 A |3ა B C D E
- The reaction of methylpropene with HBr in ether gives one of the two products below as the major product. Br HBr Br ether Product A Product B Product would have a higher energy transition state for the formation of the intermediate leading to it. O A O B O Both products would have the same transition state.What is the major product of the following reaction? CH3 NaOCH3 CH3-CH2-C-Br ČH3 CH3 CH3-CH=C-CH3 CH2 CH3-CH2-C-CH3 но CH, CH,=CH-C-Br CH3 Which of the following Sy2 reactions proceeds the slowest? CH3-CH2-F OH CH3-CH2-I OH CH3-CH2-CI + OH CH3-CH2-Br + Он Rank the species below in order of increasing nucleophilicity in protic solvent. I. H20 IL. CH3S- m. CH3CO0- IV. t- Buo- O , II, I, IV O , I, II, IV O , II, IV, I O , I, IV, IIWhat is the major elimination product obtained from the following reaction? Br toons CH3 (CH3)3CO (CH3)3COH CH₂ Of-Bu || CH₂ Of-Bu III CH3 o IV CH3
- If 1,3,5-trimethylcycloheptane will undergo monobromination, how many possible alkyl halides will be formed (exclude HBr in the counting of products)? 9 6 05 DQuestão 10A certain hydrocarbon had the molecular formula C16H26 and contained two triple bonds. Ozonolysis resulted in CH3(CH2)4CO2H and HO2CCH2CH2CO2H as the only products. What is the reasonable structure for this hydrocarbon? Hexadec-6,10-dino undec-1,5-dino Hept-1,5-dino hex-1,5-dino nah4. What are the products obtained from the following elimination reaction? Indicate the major product. CH;CH2CCH3 H2O CI 5. a) Determine the major product that is formed when the alkyl halide reacts with a hydroxide ion in an elimination reaction. CH;CH,CH,CH,CCH3 Br b) For the major elimination product obtained in 5a), which stereoisomer (cis or trans) is obtained in greater yield? Draw the two isomers and provide the names of the compounds.