1. Consider the following two reactions, only one of which will work as shown: a) What...
1. Consider the following two reactions, only one of which will work as shown:
a) What is the stereochemical relationship between starting material A and B?
b) Draw the mechanism for the reaction to convert the starting material into the product. You can use either starting material A or B to show the mechanism.
c) Draw the two chair forms for starting material A and circle the more stable chair form. Explain why the one you circled is more stable.
d) Draw the two chair forms for starting material B and circle the more stable chair form. Explain why the one you circled is more stable.
e) Using your answers to parts b-d, identify which starting material would be able to transform into the product, and which one would not. Explain your answer.
Homework Answers
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1. Consider the following two reactions, only one of which will work as shown: a) What...
7. (13 points) For the compound 1-tert-butyl-4-methylcyclohexane: a. Draw the two possible chair conformations for the...
7. (13 points) For the compound 1-tert-butyl-4-methylcyclohexane: a. Draw the two possible chair conformations for the cis isomer, Which conformation, if either, is more stable? Circle one b. Draw the two possible chair conformations for the cis isomer, Which conformation, if either, is more stable? Circle one trans: C. Between the two more stable isomers circled above, which is more stable? Why?
What would be the ideal starting material of the following reactions? (The correct answers are circled,...
What would be the ideal starting material of the following
reactions? (The correct answers are circled, but I do not
understand how those are the right answers.... please draw the
mechanism or explain why those are correct).
10-11. (24 pts) What would be the ideal starting material of the following reaction? 10. (4 pts) HBr OH OH Ho NC Br 11 (4 pts) NaH OH b) Na c) Br (e) OH Br Na OH
In some reactions, n‑butyllithium can form side products, preventing the desired product from forming. Draw one...
In some reactions, n‑butyllithium can form side
products, preventing the desired product from forming. Draw one
starting material that reacts with n-BuLi to form the two side
products shown. In addition, draw the curved arrows to explain how
each side product is formed. Be sure to include all lone pairs,
charges, and the lithium cation. I am having some trouble getting
the correct answer. Some help would be appreciated.
In some reactions, n-butyllithium can form side products, preventing the desired...
6. Predict which of the following two isomers (cis- or trans-) will undergo an E2 elimination...
6. Predict which of the following two isomers (cis- or trans-) will undergo an E2 elimination under the treatment with EtoNa in EtOH more rapidly. A) For the explanation of the reaction rate, draw chair conformations for each isomer, determine which conformation is more stable . B) Draw the major product and the mechanism of the reactions. CI cis-isomer trans-isomer
1. draw the two chair conformations of the free radical bromination product of cyclohexane. which one...
1. draw the two chair conformations of the free radical bromination product of cyclohexane. which one is more stable? and why?
Consider the reaction below. Note that the stereochemistry of the product is now shown: 12 points....
Consider the reaction below. Note that the stereochemistry of the product is now shown: 12 points. 5. Br2 CH2Cl2 Br Br a. Draw the most stable chair conformation of the starting material (i.e. the alkene). Use the chair template provided on your answer sheet. You do not need to draw ring hydrogens. (2 points) b. Draw a detailed stepwise mechanism for the reaction. Draw all intermediates and use curved arrows to show 'electron movement'. If multiple stereoisomers of the same...
1. indicate whether the following reactions will proceed via an Sni, Sn2, E1 or 2 mechanism....
1. indicate whether the following reactions will proceed via an Sni, Sn2, E1 or 2 mechanism. 2 NISCH reaction type SN NaOCH.CH reaction type 2 2. Briefly explain your answer to question 1b 3. Provide the missing starting material(s), reactant(s) or product(s) as necessary for the following reactions. DBN (a bulky base) Br NaBr B) heat 4. For the following reaction, draw the MAJOR and the MINOR products formed. Label the type of reaction the produced the product below it...
Question Description: Although there are two different bromine leaving groups in the cyclohexane derivative shown below,...
Question Description: Although there are two different bromine leaving groups in the cyclohexane derivative shown below, only one of them can be eliminated in this reaction. 2 Br Br NaOEt 2 3 6 4 5 EtOH 1144: Instructions: Investigate the reaction shown above and to clearly explain why the product provided for you forms exclusively by completing the following items: a Indicate what type of reaction is shown above. Briefly discuss the stereoelectronic/sigma-bond alignments required for this reaction to take...
2) The following two reactions are performed on the same starting material; one producing "product 1"...
2) The following two reactions are performed on the same starting material; one producing "product 1" and one producing "product 2" as the major products. Which of the following statements is false regarding these two reactions? HBr, H202 - >. HBr Product 1 (Major) - Product 2 (Major) a) The rate of reaction for product 1 is dependent on the formation of the more stable carbocation. b) The reaction for product 2 is via a radical intermediate. c) Both of...
Provide conditions for the following reactions. More than one step may be needed. Incorporate conditions that...
Provide conditions for the following reactions. More than one step may be needed. Incorporate conditions that would give you the optimum yield, and be mindful of 1. stereochemical details. (4 pts each) a b. но ОН For each reaction below, please draw the starting material or the major (singular) product, including any pertinent stereochemical details. (3 pts each) 2. a. 3. Hg(OAc)2, D20 2. KOt-Bu 1.TsCl Он 4. NaBH t-BuOH EtgN etherol b. 3. СHBES 2. LDA 1. HBr KOt-Bu,...
7. (13 points) For the compound 1-tert-butyl-4-methylcyclohexane: a. Draw the two possible chair conformations for the cis isomer, Which conformation, if either, is more stable? Circle one b. Draw the two possible chair conformations for the cis isomer, Which conformation, if either, is more stable? Circle one trans: C. Between the two more stable isomers circled above, which is more stable? Why?
What would be the ideal starting material of the following
reactions? (The correct answers are circled, but I do not
understand how those are the right answers.... please draw the
mechanism or explain why those are correct).
10-11. (24 pts) What would be the ideal starting material of the following reaction? 10. (4 pts) HBr OH OH Ho NC Br 11 (4 pts) NaH OH b) Na c) Br (e) OH Br Na OH
In some reactions, n‑butyllithium can form side
products, preventing the desired product from forming. Draw one
starting material that reacts with n-BuLi to form the two side
products shown. In addition, draw the curved arrows to explain how
each side product is formed. Be sure to include all lone pairs,
charges, and the lithium cation. I am having some trouble getting
the correct answer. Some help would be appreciated.
In some reactions, n-butyllithium can form side products, preventing the desired...
6. Predict which of the following two isomers (cis- or trans-) will undergo an E2 elimination under the treatment with EtoNa in EtOH more rapidly. A) For the explanation of the reaction rate, draw chair conformations for each isomer, determine which conformation is more stable . B) Draw the major product and the mechanism of the reactions. CI cis-isomer trans-isomer
Consider the reaction below. Note that the stereochemistry of the product is now shown: 12 points. 5. Br2 CH2Cl2 Br Br a. Draw the most stable chair conformation of the starting material (i.e. the alkene). Use the chair template provided on your answer sheet. You do not need to draw ring hydrogens. (2 points) b. Draw a detailed stepwise mechanism for the reaction. Draw all intermediates and use curved arrows to show 'electron movement'. If multiple stereoisomers of the same...
1. indicate whether the following reactions will proceed via an Sni, Sn2, E1 or 2 mechanism. 2 NISCH reaction type SN NaOCH.CH reaction type 2 2. Briefly explain your answer to question 1b 3. Provide the missing starting material(s), reactant(s) or product(s) as necessary for the following reactions. DBN (a bulky base) Br NaBr B) heat 4. For the following reaction, draw the MAJOR and the MINOR products formed. Label the type of reaction the produced the product below it...
Question Description: Although there are two different bromine leaving groups in the cyclohexane derivative shown below, only one of them can be eliminated in this reaction. 2 Br Br NaOEt 2 3 6 4 5 EtOH 1144: Instructions: Investigate the reaction shown above and to clearly explain why the product provided for you forms exclusively by completing the following items: a Indicate what type of reaction is shown above. Briefly discuss the stereoelectronic/sigma-bond alignments required for this reaction to take...
2) The following two reactions are performed on the same starting material; one producing "product 1" and one producing "product 2" as the major products. Which of the following statements is false regarding these two reactions? HBr, H202 - >. HBr Product 1 (Major) - Product 2 (Major) a) The rate of reaction for product 1 is dependent on the formation of the more stable carbocation. b) The reaction for product 2 is via a radical intermediate. c) Both of...
Provide conditions for the following reactions. More than one step may be needed. Incorporate conditions that would give you the optimum yield, and be mindful of 1. stereochemical details. (4 pts each) a b. но ОН For each reaction below, please draw the starting material or the major (singular) product, including any pertinent stereochemical details. (3 pts each) 2. a. 3. Hg(OAc)2, D20 2. KOt-Bu 1.TsCl Он 4. NaBH t-BuOH EtgN etherol b. 3. СHBES 2. LDA 1. HBr KOt-Bu,...
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