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The structures of compounds A,B and C are as follows :
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3. Epoxides such as A are formed by combining peracids with alkenes. This reaction is similar...
wides such as A are formed by combining peracids with alkenes. This reaction is similar to...
wides such as A are formed by combining peracids with alkenes. This reaction is similar to the of bromonium ion b from an kene. When epoxides are reacted with acid, an intermediate sformed that is structurally similar to b. Likewise, when water is added to Bit forms a product in a mechanism identical to the one from bibe. Draw the structures of A, B and C CPA HO HO C 4. Using the information abone draw the products of the...
МСРВА Alkenes are oxidized to give epoxides on treatment with a peroxyacid, RCo,H, such as metachloroperoxybenzoic...
МСРВА Alkenes are oxidized to give epoxides on treatment with a peroxyacid, RCo,H, such as metachloroperoxybenzoic acid (MCPBA). Peroxyacids transfer an oxygen atom to the alkene with syn stereochemistry, i.e. both C-O bonds form on the same face of the double bond, through a single step mechanism without intermediates. The oxygen atom farthest from the carbonyl group is the one transferred. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions - XT...
for alkenes A,B,C, draw the products formed when each alkene is treated with ozone, followed by...
for alkenes A,B,C, draw the
products formed when each alkene is treated with ozone, followed by
Zn, H2O. Be sure to answer all parts
For alkenes A, B, and C, draw the products formed when each alkene is treated with ozone, followed by Zn, H2O. Be sure to answer all parts.
4. [12 pts] Propose mechanisms for the formation of all 3 products shown in the reaction...
4. [12 pts] Propose mechanisms for the formation of all 3 products shown in the reaction below: (draw curved arrows, intermediates, and resonance structures if necessary. NO NEED FOR TRANSITION STATES! CH CH CH CH Br Heat CH,CH,OH OCH.CH Mechanism.14 points) Mechanism 2 points) Mechanism.3 14 points) 5. [14 pts] Provide the major products of reacting the alkene shown in the middle of the scheme below with all the reagents independently. Draw the products' structures in the corresponding table below...
2 problems REVIEW Topics [References) CH HC OCH Br2 CH3 B H3C CH,OH H₂C CH₂ Electrophilic...
2 problems
REVIEW Topics [References) CH HC OCH Br2 CH3 B H3C CH,OH H₂C CH₂ Electrophilic addition of hypohalous acids to alkenes yields a 1,2-haloalcohol called a halohydrin. Halohydrin formation, however, does not result from the addition of HOBr, for example. Instead the addition is done indirectly by reaction of the alkene with Br, in the presence of water. The reaction also works with Cl2 to give chlorohydrins instead of bromohydrins. The reaction proceeds through a cyclic intermediate known as...
Alkene reaction and mechanisms practice exercise 1) O₃ 2) (CH3)2S 25) Treatment of cyclopentene with peroxybenzoic...
Alkene reaction and mechanisms practice exercise
1) O₃ 2) (CH3)2S 25) Treatment of cyclopentene with peroxybenzoic acid A) results in oxidative cleavage of the ring to produce an acyclic compound B) yields a meso epoxide C) yields an equimolar mixture of enantiomeric epoxides D) gives the same product as treatment of cyclopentene with Os04 E) none of the above 26) Provide a detailed, step-by-step mechanism for the reaction shown below. но Br2 na + HBT Br 27) Provide a detailed,...
Acid Catalyzed Hydration-treatment of alkenes with water in the presence of acid catalyst leads to the...
Acid Catalyzed Hydration-treatment of alkenes with water in the presence of acid catalyst leads to the formation of alcohols. H2SO4/H2O > 150°C Mechanism Major Product Acid catalyzed dehydration goes through a carbocation intermediate. This means that the Markovnikov product is obtained when carbocation rearrangements do not occur. The need for excessively high temperatures makes this reaction of limited use in laboratory synthesis. Oxymercuration - Oxymercuration involves the addition of Hg to the alkene using mercury (II) acetate Hg(OAc) followed by...
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...
Answer questions A-D please. ONLY ANSWER THE QUESTIONS IF YOU KNOW IT FOR SURE BECAUSE MY...
Answer questions A-D please. ONLY ANSWER THE QUESTIONS
IF YOU KNOW IT FOR SURE BECAUSE MY MONEY IS BEING WASTED WHEN MY
QUESTIONS ARE BEING ANSWERED WRONG. Thank you!!!
A.) Below is a summary of alkene reactions. Complete
them by providing the missing structures (including stereochemistry
wherever it applies).
B.) Draw the structure of the carbocation formed
during the reaction of the alkene from chart A with HCl.
C.) Draw the mechanism of the reaction of Br2 addition.
D.) Draw...
As we said in lecture, furan (left) is less aromatic than benzene. At cold temperatures, addition...
As we said in lecture, furan (left) is less aromatic than benzene. At cold temperatures, addition products such as A can be observed. However, when a solution of product A is allowed to warm up, it will decompose to B, restoring aromaticity. Draw a curved arrow mechanism for formation of A and then B. You may assume that the first elementary step of the addition reaction is formation of a bromonium ion. 1. Br2 cold Br warm
wides such as A are formed by combining peracids with alkenes. This reaction is similar to the of bromonium ion b from an kene. When epoxides are reacted with acid, an intermediate sformed that is structurally similar to b. Likewise, when water is added to Bit forms a product in a mechanism identical to the one from bibe. Draw the structures of A, B and C CPA HO HO C 4. Using the information abone draw the products of the...
МСРВА Alkenes are oxidized to give epoxides on treatment with a peroxyacid, RCo,H, such as metachloroperoxybenzoic acid (MCPBA). Peroxyacids transfer an oxygen atom to the alkene with syn stereochemistry, i.e. both C-O bonds form on the same face of the double bond, through a single step mechanism without intermediates. The oxygen atom farthest from the carbonyl group is the one transferred. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions - XT...
for alkenes A,B,C, draw the
products formed when each alkene is treated with ozone, followed by
Zn, H2O. Be sure to answer all parts
For alkenes A, B, and C, draw the products formed when each alkene is treated with ozone, followed by Zn, H2O. Be sure to answer all parts.
4. [12 pts] Propose mechanisms for the formation of all 3 products shown in the reaction below: (draw curved arrows, intermediates, and resonance structures if necessary. NO NEED FOR TRANSITION STATES! CH CH CH CH Br Heat CH,CH,OH OCH.CH Mechanism.14 points) Mechanism 2 points) Mechanism.3 14 points) 5. [14 pts] Provide the major products of reacting the alkene shown in the middle of the scheme below with all the reagents independently. Draw the products' structures in the corresponding table below...
2 problems
REVIEW Topics [References) CH HC OCH Br2 CH3 B H3C CH,OH H₂C CH₂ Electrophilic addition of hypohalous acids to alkenes yields a 1,2-haloalcohol called a halohydrin. Halohydrin formation, however, does not result from the addition of HOBr, for example. Instead the addition is done indirectly by reaction of the alkene with Br, in the presence of water. The reaction also works with Cl2 to give chlorohydrins instead of bromohydrins. The reaction proceeds through a cyclic intermediate known as...
Alkene reaction and mechanisms practice exercise
1) O₃ 2) (CH3)2S 25) Treatment of cyclopentene with peroxybenzoic acid A) results in oxidative cleavage of the ring to produce an acyclic compound B) yields a meso epoxide C) yields an equimolar mixture of enantiomeric epoxides D) gives the same product as treatment of cyclopentene with Os04 E) none of the above 26) Provide a detailed, step-by-step mechanism for the reaction shown below. но Br2 na + HBT Br 27) Provide a detailed,...
Acid Catalyzed Hydration-treatment of alkenes with water in the presence of acid catalyst leads to the formation of alcohols. H2SO4/H2O > 150°C Mechanism Major Product Acid catalyzed dehydration goes through a carbocation intermediate. This means that the Markovnikov product is obtained when carbocation rearrangements do not occur. The need for excessively high temperatures makes this reaction of limited use in laboratory synthesis. Oxymercuration - Oxymercuration involves the addition of Hg to the alkene using mercury (II) acetate Hg(OAc) followed by...
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...
Answer questions A-D please. ONLY ANSWER THE QUESTIONS
IF YOU KNOW IT FOR SURE BECAUSE MY MONEY IS BEING WASTED WHEN MY
QUESTIONS ARE BEING ANSWERED WRONG. Thank you!!!
A.) Below is a summary of alkene reactions. Complete
them by providing the missing structures (including stereochemistry
wherever it applies).
B.) Draw the structure of the carbocation formed
during the reaction of the alkene from chart A with HCl.
C.) Draw the mechanism of the reaction of Br2 addition.
D.) Draw...
As we said in lecture, furan (left) is less aromatic than benzene. At cold temperatures, addition products such as A can be observed. However, when a solution of product A is allowed to warm up, it will decompose to B, restoring aromaticity. Draw a curved arrow mechanism for formation of A and then B. You may assume that the first elementary step of the addition reaction is formation of a bromonium ion. 1. Br2 cold Br warm
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