1) (R)-2-bromobutane + NaSCH3 —->? 2) (S)-3-bromocyclohex-1-ene + acetic acid—>? 3) 1-bromoheptane + :PPh3 —>? 4)...
Homework Answers
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1)
(R)-2-bromobutane + NaSCH3 —->?
2) (S)-3-bromocyclohex-1-ene + acetic acid—>?
3) 1-bromoheptane + :PPh3 —>?
4)...
1. Predict the major substitution product(s) for the following reactions. Include stereochemistry if appropriate. You may...
1. Predict the major substitution product(s) for the following reactions. Include stereochemistry if appropriate. You may assume an aqueous workup is performed after each reaction. 1. Nah, DMF ТОН 2. Mel BrMg-Ph KCN 16 { ad ton ot MeOH HD Na Br Me DMSO EtOH Br ~ Br DMSO * Me OH LNH2 M HO Me-S (1 equiv) Me DMF
d. AG-AH-AS/T 42. How many stereoisomers of 4-chloro-2-methylpentane (CHs):CHCH:CHCICHs, exist? a. I b. 2 c. 3...
d. AG-AH-AS/T 42. How many stereoisomers of 4-chloro-2-methylpentane (CHs):CHCH:CHCICHs, exist? a. I b. 2 c. 3 d. 4 43. What is the major organic product obtained from the reaction of 1-butanol with aqueous HBr at reflux? a. 1-bromobutane b. 2-bromobutane c. 2-bromo-1-butanol d. 1-butene 44. Which of the following alcohols reacts fastest with HBr to give the corresponding alkyl bromide? a. methanol b. ethanol 2-propanol d. 2-methyl-2-propanol C. 45.Which of the following alcohols undergoes the most H2SO4 to give rapid...
Problem 13. Write a bond-line formula for each of the following compounds. (a) (E)-1,4-dibromopent-2-ene (b) (R)-3-chloro-2-methylbut-l-ene...
Problem 13. Write a bond-line formula for each of the following compounds. (a) (E)-1,4-dibromopent-2-ene (b) (R)-3-chloro-2-methylbut-l-ene Problem 14. You have the task of preparing styrene (C.HSCH=CH;) by dehydrohalogenation of either 1- bromo-2-phenylethane or 1-bromo-1-phenylethane using KOH in ethanol at reflux temperature. Which halide would you choose as your starting material to give the better yield of the alkene Explain your answer. Problem 15. The reactions below are unlikely to occur as described. Predict the true major product and the reaction...
1. Which alkene is the least stable? A 2,4-dimethylpent-2-ene B 2,4-dimethylrent-1-ene C 2.3 dimethylent-2-ene D. 3,4-dimethylpent-2-ene...
1. Which alkene is the least stable? A 2,4-dimethylpent-2-ene B 2,4-dimethylrent-1-ene C 2.3 dimethylent-2-ene D. 3,4-dimethylpent-2-ene E. 3,4-dimethylpent-1-ene A. Solventio B. Hydrogen C. Heat Cap D. Both A a E Both Ba 8. Why is 2. Which is the major product from reaction of sodium iodine with (R)-2-bromo-3-methylbutane in dicholormethane (methylene chloride? A. 2-iodo-2-methylbutane B. 2-methylbut-2-ene C. (S)-2-iodo-3-methyl butante D. 2-methylbut-l-ene E. No Reaction A Atom B. Reso C. Hyb D. Pols E. Indi 3. Which is the major product...
3) Show how hex-1-yne might be converted to: a. 1-bromohex-1-ene b. 1,1,2,2-tetrabromohexane C. 2-bromohex-1-ene d. 2-bromohexane...
3) Show how hex-1-yne might be converted to: a. 1-bromohex-1-ene b. 1,1,2,2-tetrabromohexane C. 2-bromohex-1-ene d. 2-bromohexane e. 2,2-dibromohexane 4) For each compound, give the product(s) expected from (1) HgSo./H2SO4-catalyzed hydration and (2) hydroboration-oxidation. a. hex-1-yne b. hex-2-yne c. hex-3-yne d. cyclodecyne 5) Predict the product(s) you would expect from treatment of each compound with (1) dilute, neutral KMnO, and (2) warm, basic KMnO, then dilute acid. a. hex-1-yne b. hex-2-yne c. hex-3-yne d. 2-methylhex-3-yne e. But-1-ene → butan-2-ol 6) Show...
1.1 In which of the following solvents would the reaction of 1-bromobutane with sodium azide,NaN3, proceed...
1.1 In which of the following solvents would the reaction of
1-bromobutane with sodium azide,NaN3, proceed the fastest?
a.aceticacid
b.ethanol
c.water
d.acetonitrile
1.2 Which of the following solvents is the best choice for the
reaction of 1-chlorohexane with sodium bromide?
a.dimethylsulfoxide
b.water
c.hexane
d.toluene,PhCH3
1.3 Which of the following is most likely to undergo
rearrangement during reaction with methanol?
1.4 Name which energy diagrams represents the course of an
exothermic SN1, SN2,E1, or E2 reaction?
1.5 Which of the following...
1. Predict the major product for the reactions shown below; pick any 5: HO xs CHal Ag20 NaOEt EtOH, Δ -H2O HO но он 0 он H2SO4 H20, A heat 1) PhMgBr 1) NaOH, Br2 2) 5% HCI 2)H3O+, Δ OEt 1) PPh3 3...
1. Predict the major product for the reactions shown below; pick any 5: HO xs CHal Ag20 NaOEt EtOH, Δ -H2O HO но он 0 он H2SO4 H20, A heat 1) PhMgBr 1) NaOH, Br2 2) 5% HCI 2)H3O+, Δ OEt 1) PPh3 3) KOtBu 2) O 1) NaOH on. Br 2) O o
1. Predict the major product for the reactions shown below; pick any 5: HO xs CHal Ag20 NaOEt EtOH, Δ -H2O HO но он 0 он...
Synthesis of 1-Bromobutane: An SN2 Reaction Pre-Laboratory Exercises PRE-LABORATORY EXERCISES NAME: Cynthesis of 1-Bromobutane: An SN...
Synthesis of 1-Bromobutane: An SN2 Reaction Pre-Laboratory
Exercises
PRE-LABORATORY EXERCISES NAME: Cynthesis of 1-Bromobutane: An SN 2 Reaction Butylbromide was prepared by refluxing in a 100-ml round bottomed flask a solution containing 13:35 Br 15 ml of water, 10 mL of n-butyl alcohol. 15 ml of concentrated H.SO. and a few boiling stories, 1. 2. R." d 1.275 laborales Nel CH3CH2CH2CH2OH + NaBr H2SO4 Superletalyst CHCH2CH2CHBr + NaHSO + HO (eq. 16) 1-butanol bp 118 C 1-bromobutane d 0.810 bp...
Which of the following correctly reflects relative stabilities of carbocations? 3 degree allylic > 2 degree...
Which of the following correctly reflects relative stabilities of carbocations? 3 degree allylic > 2 degree > 1 degree benzylic methyl > 2 degree benzylic > 3 degree 3 degree benzylic > vinyl >1 degree 2 degree allylic > 2 degree > vinyl 1 degree benzylic > 3 degree > 3 degree allylic Dehydrohalogenation of 2-bromobutane in the presence of a strong base proceeds via which of the following mechanistic pathways? S_N1 S_N2 E1 E2 none of the above Which...
2 Which is the major prodect from reaction of sodiam iodine with (R)-2-bromo-3-methy butane in dicholormethane (met...
2 Which is the major prodect from reaction of sodiam iodine with (R)-2-bromo-3-methy butane in dicholormethane (methylene chioridey A 24odo-2-methy ibutane B. 2-methylbut-2-ene C (S)2-iodo-3-methyl butante D. 2-methylbut-1-ene E No Reaction 3. Which is the major product from reaction of sodium hydroxide with (S)-2-iodo-3,3-dimethylbutane in water? A. 3,3-dimethylbut-1-ene B. 2,4-dimethylbut-2-ene C. 2,4-diemthylbut-1-ene D. 2-methylbut-2-ene E. 2-methylbut-1-ene trl d bste 4. How many potential products from halogenation of 2-phenylbut-2-ene? A. I В. 2 С.3 D. 4 E. 5 2 SN N...
1. Predict the major substitution product(s) for the following reactions. Include stereochemistry if appropriate. You may assume an aqueous workup is performed after each reaction. 1. Nah, DMF ТОН 2. Mel BrMg-Ph KCN 16 { ad ton ot MeOH HD Na Br Me DMSO EtOH Br ~ Br DMSO * Me OH LNH2 M HO Me-S (1 equiv) Me DMF
d. AG-AH-AS/T 42. How many stereoisomers of 4-chloro-2-methylpentane (CHs):CHCH:CHCICHs, exist? a. I b. 2 c. 3 d. 4 43. What is the major organic product obtained from the reaction of 1-butanol with aqueous HBr at reflux? a. 1-bromobutane b. 2-bromobutane c. 2-bromo-1-butanol d. 1-butene 44. Which of the following alcohols reacts fastest with HBr to give the corresponding alkyl bromide? a. methanol b. ethanol 2-propanol d. 2-methyl-2-propanol C. 45.Which of the following alcohols undergoes the most H2SO4 to give rapid...
Problem 13. Write a bond-line formula for each of the following compounds. (a) (E)-1,4-dibromopent-2-ene (b) (R)-3-chloro-2-methylbut-l-ene Problem 14. You have the task of preparing styrene (C.HSCH=CH;) by dehydrohalogenation of either 1- bromo-2-phenylethane or 1-bromo-1-phenylethane using KOH in ethanol at reflux temperature. Which halide would you choose as your starting material to give the better yield of the alkene Explain your answer. Problem 15. The reactions below are unlikely to occur as described. Predict the true major product and the reaction...
1. Which alkene is the least stable? A 2,4-dimethylpent-2-ene B 2,4-dimethylrent-1-ene C 2.3 dimethylent-2-ene D. 3,4-dimethylpent-2-ene E. 3,4-dimethylpent-1-ene A. Solventio B. Hydrogen C. Heat Cap D. Both A a E Both Ba 8. Why is 2. Which is the major product from reaction of sodium iodine with (R)-2-bromo-3-methylbutane in dicholormethane (methylene chloride? A. 2-iodo-2-methylbutane B. 2-methylbut-2-ene C. (S)-2-iodo-3-methyl butante D. 2-methylbut-l-ene E. No Reaction A Atom B. Reso C. Hyb D. Pols E. Indi 3. Which is the major product...
3) Show how hex-1-yne might be converted to: a. 1-bromohex-1-ene b. 1,1,2,2-tetrabromohexane C. 2-bromohex-1-ene d. 2-bromohexane e. 2,2-dibromohexane 4) For each compound, give the product(s) expected from (1) HgSo./H2SO4-catalyzed hydration and (2) hydroboration-oxidation. a. hex-1-yne b. hex-2-yne c. hex-3-yne d. cyclodecyne 5) Predict the product(s) you would expect from treatment of each compound with (1) dilute, neutral KMnO, and (2) warm, basic KMnO, then dilute acid. a. hex-1-yne b. hex-2-yne c. hex-3-yne d. 2-methylhex-3-yne e. But-1-ene → butan-2-ol 6) Show...
1.1 In which of the following solvents would the reaction of
1-bromobutane with sodium azide,NaN3, proceed the fastest?
a.aceticacid
b.ethanol
c.water
d.acetonitrile
1.2 Which of the following solvents is the best choice for the
reaction of 1-chlorohexane with sodium bromide?
a.dimethylsulfoxide
b.water
c.hexane
d.toluene,PhCH3
1.3 Which of the following is most likely to undergo
rearrangement during reaction with methanol?
1.4 Name which energy diagrams represents the course of an
exothermic SN1, SN2,E1, or E2 reaction?
1.5 Which of the following...
1. Predict the major product for the reactions shown below; pick any 5: HO xs CHal Ag20 NaOEt EtOH, Δ -H2O HO но он 0 он H2SO4 H20, A heat 1) PhMgBr 1) NaOH, Br2 2) 5% HCI 2)H3O+, Δ OEt 1) PPh3 3) KOtBu 2) O 1) NaOH on. Br 2) O o
1. Predict the major product for the reactions shown below; pick any 5: HO xs CHal Ag20 NaOEt EtOH, Δ -H2O HO но он 0 он...
Synthesis of 1-Bromobutane: An SN2 Reaction Pre-Laboratory
Exercises
PRE-LABORATORY EXERCISES NAME: Cynthesis of 1-Bromobutane: An SN 2 Reaction Butylbromide was prepared by refluxing in a 100-ml round bottomed flask a solution containing 13:35 Br 15 ml of water, 10 mL of n-butyl alcohol. 15 ml of concentrated H.SO. and a few boiling stories, 1. 2. R." d 1.275 laborales Nel CH3CH2CH2CH2OH + NaBr H2SO4 Superletalyst CHCH2CH2CHBr + NaHSO + HO (eq. 16) 1-butanol bp 118 C 1-bromobutane d 0.810 bp...
Which of the following correctly reflects relative stabilities of carbocations? 3 degree allylic > 2 degree > 1 degree benzylic methyl > 2 degree benzylic > 3 degree 3 degree benzylic > vinyl >1 degree 2 degree allylic > 2 degree > vinyl 1 degree benzylic > 3 degree > 3 degree allylic Dehydrohalogenation of 2-bromobutane in the presence of a strong base proceeds via which of the following mechanistic pathways? S_N1 S_N2 E1 E2 none of the above Which...
2 Which is the major prodect from reaction of sodiam iodine with (R)-2-bromo-3-methy butane in dicholormethane (methylene chioridey A 24odo-2-methy ibutane B. 2-methylbut-2-ene C (S)2-iodo-3-methyl butante D. 2-methylbut-1-ene E No Reaction 3. Which is the major product from reaction of sodium hydroxide with (S)-2-iodo-3,3-dimethylbutane in water? A. 3,3-dimethylbut-1-ene B. 2,4-dimethylbut-2-ene C. 2,4-diemthylbut-1-ene D. 2-methylbut-2-ene E. 2-methylbut-1-ene trl d bste 4. How many potential products from halogenation of 2-phenylbut-2-ene? A. I В. 2 С.3 D. 4 E. 5 2 SN N...
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