1) Describe the mechanism for dihydroxylation of an alkene through the use of a peroxide followed...
1) Describe the mechanism for dihydroxylation of an alkene through the use of a peroxide followed by the addition of water (in a basic or acidic environment).
2) Which mechanism of an earlier chapter is the epoxidation most similar to?
Please explain your answer if possible, and describe why each step of the reaction is taking place.
Homework Answers
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1) Describe the mechanism for dihydroxylation of an alkene
through the use of a peroxide followed...
3. Draw a stepwise, detailed mechanism for the acid-catalyzed hydration reaction in question 2 above. Use...
3. Draw a stepwise, detailed mechanism for the acid-catalyzed hydration reaction in question 2 above. Use curved arrows to indicate the flow of electrons. (Note: use hydronium ion, H307, in your mechanism to indicate "acidic water"). (6 pts) 4. Draw a stepwise, detailed mechanism for the reaction below. Use curved arrows to indicate the flow of electrons. (Hint: think of this reaction as a combination of addition of HX (step 1) and hydration (step 2)]. In the second step, an...
Help on all parts of question 3 would be greatly appreciated! 3. Treating alkene "A" below...
Help on all parts of question 3 would be greatly
appreciated!
3. Treating alkene "A" below with HBr can lead to a number of products. "A" + H-Br A bunch of products. For real, hella products. 3.A. Label the stereocenters in compound "A" as R or S and label the alkene as E or Z. 3.B. Draw the curved arrow mechanism leading to the most stabilized carbo- cation intermediate. (don't do any rearrangements, just acid/base with the alkene) H-Br most...
(C) Protonation of alkene to form a carbocation followed by addition of bromide ion (D) Addition...
(C) Protonation of alkene to form a carbocation followed by addition of bromide ion (D) Addition of the proton to one face of the alkene with simultaneous delivery of a bromide ion from a different molecule of H-Br. 11. Which compound is the strongest nmucleophile for reaction of methane methanesulfonate (CHOS0.CH) in methanol at room temperature? (You may assume that everything is soluble in methanol) (A) potassium bromide (B) cesium iodide (C) sodiam chloride (D) lithium flaoride 12. Which proton...
please answer all parts, thanks! 1. More substituted alkenes are more stable than less substituted alkenes....
please answer all parts, thanks!
1. More substituted alkenes are more stable than less substituted alkenes. Show the orbital overlap that helps to explain this observation. 2. Why is the heat of hydrogenation for an alkene exothermic? Analyze the bonds that are changing. AH = -30 kcal/mol Explain: + H2 3. Treating alkene "A" below with HBr can lead to a number of products. "A" SM + H-Br A bunch of products. For real, hella products. 3.A. Label the stereocenters...
C. Indicate which is the late-detemning step. d. Is it the same mechanism as in question...
C. Indicate which is the late-detemning step. d. Is it the same mechanism as in question 1? Why or why not? 3. Explain why El and Sx1 mechanisms follow first order reaction kinetics, whereas E2 and SN2 mechanisms follow second order reaction kinetics. 4. Which is the better nucleophile in a protic solvent: chloride ion or bromide ion? Try to explain this in terms of the nature of the chloride ion and the bromide ion. 5. For the synthesis of...
only J and K Z0OM 1. Draw the mechanism and predict the products (including all possible...
only J and K
Z0OM 1. Draw the mechanism and predict the products (including all possible stereoisomers) for the reaction of the reactant below (whose name is: Hасн,С.. Н.с" Нас CH3 (a) with hydrogen bromide. Also consider: after forming the product(s) what reagent(s) and conditions need to be used in order to reform the above reactant? (b) with hydrogen bromide with alkyl peroxide. would hydrogen chloride or hydrogen bromide work in this reaction? (c) with dilute aqueous solution of sulfuric...
1.. Example questions to guide you through the mechanism study of Serine proteases Describe substrate binding,...
1.. Example questions to guide you through the mechanism study of Serine proteases Describe substrate binding, including the role and chemical nature of the "specificity pocket" in chymotrypsin, and which peptide bond in the substrate (relative to the specificity group) will be cleaved. Draw the structure of the catalytic triad at the beginning of the reaction, and explain how the states of ionization and hydrogen bonding pattern of those 3 groups change step by step during catalysis. Explain the role...
please help me with Organic Chemistry/Alkenes problems. Thank you! Directions: Place your answers to the following...
please help me with Organic Chemistry/Alkenes problems. Thank you!
Directions: Place your answers to the following questions in the spaces provided. 1. A common problem in the acid-catalyzed hydration of alkenes is the formation of an ether byproduct. Show the formation of the ether byproduct in relation to the reaction below by providing a curved-arrow mechanism for its formation. (2 pts) H30+ Н,0 OH Ans. 2. Which is the correct sequence of steps necessary to complete the following reaction? он...
5) (8 pts) Arrange the following compounds from most acidic through neutral to most basic. Briefly...
5) (8 pts) Arrange the following compounds from most acidic through neutral to most basic. Briefly explain your reasoning. 7) (15 pts) a) Write out the 3-step arrow pushing mechanism showing how 1-pentene is hydrated to make 2-pentanol. b) Draw the other 2 alkenes (don't forgel cis/trans isomers!) that could also be hydrated to make 2-pentanol. Briefly explain why 1-pentene is the best choice. II, II,O a) heat Acidic Neutral Basic 6) (18 pts) Consider the Fischer projections of the...
need help with 1-21 1) Label the steps below as "slow" and "fast". HCH 013 10...
need help with 1-21
1) Label the steps below as "slow" and "fast". HCH 013 10 = H. C + + H-LG H-LG 2) Why are they slow/fast? Explain using chemical terms. Stereochemistry of the Sn1 reaction 3) What type of intermediate does the Sn1 reaction proceed through? 4) What is the geometry of the carbon that the nucleophile coordinates to in the 2 step? 5) From how many directions would it be reasonable for the nucleophile to approach the...
3. Draw a stepwise, detailed mechanism for the acid-catalyzed hydration reaction in question 2 above. Use curved arrows to indicate the flow of electrons. (Note: use hydronium ion, H307, in your mechanism to indicate "acidic water"). (6 pts) 4. Draw a stepwise, detailed mechanism for the reaction below. Use curved arrows to indicate the flow of electrons. (Hint: think of this reaction as a combination of addition of HX (step 1) and hydration (step 2)]. In the second step, an...
Help on all parts of question 3 would be greatly
appreciated!
3. Treating alkene "A" below with HBr can lead to a number of products. "A" + H-Br A bunch of products. For real, hella products. 3.A. Label the stereocenters in compound "A" as R or S and label the alkene as E or Z. 3.B. Draw the curved arrow mechanism leading to the most stabilized carbo- cation intermediate. (don't do any rearrangements, just acid/base with the alkene) H-Br most...
(C) Protonation of alkene to form a carbocation followed by addition of bromide ion (D) Addition of the proton to one face of the alkene with simultaneous delivery of a bromide ion from a different molecule of H-Br. 11. Which compound is the strongest nmucleophile for reaction of methane methanesulfonate (CHOS0.CH) in methanol at room temperature? (You may assume that everything is soluble in methanol) (A) potassium bromide (B) cesium iodide (C) sodiam chloride (D) lithium flaoride 12. Which proton...
please answer all parts, thanks!
1. More substituted alkenes are more stable than less substituted alkenes. Show the orbital overlap that helps to explain this observation. 2. Why is the heat of hydrogenation for an alkene exothermic? Analyze the bonds that are changing. AH = -30 kcal/mol Explain: + H2 3. Treating alkene "A" below with HBr can lead to a number of products. "A" SM + H-Br A bunch of products. For real, hella products. 3.A. Label the stereocenters...
C. Indicate which is the late-detemning step. d. Is it the same mechanism as in question 1? Why or why not? 3. Explain why El and Sx1 mechanisms follow first order reaction kinetics, whereas E2 and SN2 mechanisms follow second order reaction kinetics. 4. Which is the better nucleophile in a protic solvent: chloride ion or bromide ion? Try to explain this in terms of the nature of the chloride ion and the bromide ion. 5. For the synthesis of...
only J and K
Z0OM 1. Draw the mechanism and predict the products (including all possible stereoisomers) for the reaction of the reactant below (whose name is: Hасн,С.. Н.с" Нас CH3 (a) with hydrogen bromide. Also consider: after forming the product(s) what reagent(s) and conditions need to be used in order to reform the above reactant? (b) with hydrogen bromide with alkyl peroxide. would hydrogen chloride or hydrogen bromide work in this reaction? (c) with dilute aqueous solution of sulfuric...
please help me with Organic Chemistry/Alkenes problems. Thank you!
Directions: Place your answers to the following questions in the spaces provided. 1. A common problem in the acid-catalyzed hydration of alkenes is the formation of an ether byproduct. Show the formation of the ether byproduct in relation to the reaction below by providing a curved-arrow mechanism for its formation. (2 pts) H30+ Н,0 OH Ans. 2. Which is the correct sequence of steps necessary to complete the following reaction? он...
5) (8 pts) Arrange the following compounds from most acidic through neutral to most basic. Briefly explain your reasoning. 7) (15 pts) a) Write out the 3-step arrow pushing mechanism showing how 1-pentene is hydrated to make 2-pentanol. b) Draw the other 2 alkenes (don't forgel cis/trans isomers!) that could also be hydrated to make 2-pentanol. Briefly explain why 1-pentene is the best choice. II, II,O a) heat Acidic Neutral Basic 6) (18 pts) Consider the Fischer projections of the...
need help with 1-21
1) Label the steps below as "slow" and "fast". HCH 013 10 = H. C + + H-LG H-LG 2) Why are they slow/fast? Explain using chemical terms. Stereochemistry of the Sn1 reaction 3) What type of intermediate does the Sn1 reaction proceed through? 4) What is the geometry of the carbon that the nucleophile coordinates to in the 2 step? 5) From how many directions would it be reasonable for the nucleophile to approach the...
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