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8.(12 pts) Draw the mechanism for the addition of water to the alkene (with acid catalyst)...
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...
Help me draw this *mechanism*please! My acid catalyst is H2SO4 (sulfuric acid) please show me the...
Help me draw this *mechanism*please! My acid catalyst is H2SO4
(sulfuric acid) please show me the pre-step, nucleophilic attack,
and the two proton shift. Thanks!!
acetic acid + 1-propanol = propyl acetate + water
+ ЛОН acid catalyst + ОН acetic acid H2O 1-propanol propyl acetate (pear)
2 problems 1. Hg(OAC)2, H20 2. NaBHg CH3 H3C H₃C Acid-catalyzed addition of water to an...
2
problems
1. Hg(OAC)2, H20 2. NaBHg CH3 H3C H₃C Acid-catalyzed addition of water to an alkene yields an alcohol with Markovnikov regiochemistry. The electrophilic add carbon with the most hydrogens to yield the most stable carbocation intermediate, which then adds water to give the produc Because a carbocation intermediate is formed, rearrangements can occur prior to the addition of water. To avoid the possibility of rearrangement and still give a Markovnikov alcohol, alkenes can instead be treated with mercury...
Which of the following is true of the mechanism of BH3 addition to an alkene? Select...
Which of the following is true of the mechanism of
BH3 addition to an alkene?
Select one:
a. BH3 adds to alkene by formation of a
strained 3-membered ring intermediate.
b. B-H adds to C=C in a concerted, SYN
addition.
c. B-H adds to C=C in a step-wise, SYN
addition.
d. B-H attaches to alkene with ANTI
stereochemistry.
What is the organic product formed in the following sequence of reactions? CH2 (1) HgOAcz + H2O V (2) NaBH4 2) NAB...
Acid-catalyzed addition of water to an alkene yields an alcohol with Markovnikov regiochemistry
Acid-catalyzed addition of water to an alkene yields an alcohol
with Markovnikov regiochemistry. The electrophilic H+ adds to the
sp^2 carbon with the most hydrogens to yield the most stable
carbocation intermediate, which then adds water to give the product
alcohol. To avoid the possibility of rearrangement and still give a Markovnikov alcohol, alkenes can instead be treated with mercury(II) acetate in aqucous THF and then subsequently reduced with sodium borohydride. This reaction proceeds through a cyclic mercurinium ion intermediate which...
1)Draw all alkene prodcuts that could form 2) Circle the major alkene product expected 3) Draw...
1)Draw all alkene prodcuts that could form
2) Circle the major alkene product expected
3) Draw a complete arrow pushing mechanism how the major
product is formed. (Show all srrows, intermediate structures,
formal charges)
2. (19pts) The alcohol dehydration product below is of the El type elimination. (i) Draw all of the alkene products that could possibly form. (ii) Circle the major alkene product expected. (ii) Draw a complete curved arrow-pushing mechanism illustrating how the major product is formed. Be...
Complete the mechanism for the electrophilic addition when the alkene is treated with water in acid.a)...
Complete the mechanism for the electrophilic addition when the alkene is treated with water in acid.a) Use curved arrows to show the attack on the electrophilic hydrogen by the alkene. b) Complete the structure or the carbocation intermediate by adding the missing positive charge.c) Use a curved arrow to show the attack of the water on the carbocation.
Draw the Major alkene product and minor where indicated. Show the correct alkene geometry and/or absolute...
Draw the Major alkene product and minor where indicated. Show
the correct alkene geometry and/or absolute configuration at carbon
stereocenters. (Follow side instructions as asked like on D and
E).
1. (24pts) In the empty boxes, draw the structure of the MAJOR alkene product expected following each E2 reaction. Where indicated, also draw the minor alkene(s) formed. Also, show the correct akene geometry and/or absolute configuration at carbon stereocenters present in any of the products expected. Follow any additional instruction...
37. H0+ (CH3), C CH OH alkene + H2O Draw the structure of the major alkene...
37. H0+ (CH3), C CH OH alkene + H2O Draw the structure of the major alkene product of this acid-catalyzed dehydration. (Hint: rearrangement.) 38. alkenes Three alkenes produce butane when treated with hydrogen and platinum. Draw their structures. + H-Br - 39. CH2=CH CH3 CH2-CH-CH, H Br The first step of the mechanism of this reaction produces two carbocations. Draw both and circle the one that is more stable. ODHO Br 11 =C + Br - Br - - Br...
VI. Mechanism. (14) 1. Draw a stepwise electron pushing mechanism to predict the products in the...
VI. Mechanism. (14) 1. Draw a stepwise electron pushing mechanism to predict the products in the following reduction. Make sure to show the correct locations of any deuterium (D) labels (4) 1. LA EXCESS) Co che le 2 0,09 2. Draw a complete stepwise electron pushing mechanism for the acylation of toluene below. Make sure to clearly indicate the role of the catalyst and how it is regenerated. Also clearly indicate why the methyl substituent directs the cyl group to...
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...
Help me draw this *mechanism*please! My acid catalyst is H2SO4
(sulfuric acid) please show me the pre-step, nucleophilic attack,
and the two proton shift. Thanks!!
acetic acid + 1-propanol = propyl acetate + water
+ ЛОН acid catalyst + ОН acetic acid H2O 1-propanol propyl acetate (pear)
2
problems
1. Hg(OAC)2, H20 2. NaBHg CH3 H3C H₃C Acid-catalyzed addition of water to an alkene yields an alcohol with Markovnikov regiochemistry. The electrophilic add carbon with the most hydrogens to yield the most stable carbocation intermediate, which then adds water to give the produc Because a carbocation intermediate is formed, rearrangements can occur prior to the addition of water. To avoid the possibility of rearrangement and still give a Markovnikov alcohol, alkenes can instead be treated with mercury...
Which of the following is true of the mechanism of
BH3 addition to an alkene?
Select one:
a. BH3 adds to alkene by formation of a
strained 3-membered ring intermediate.
b. B-H adds to C=C in a concerted, SYN
addition.
c. B-H adds to C=C in a step-wise, SYN
addition.
d. B-H attaches to alkene with ANTI
stereochemistry.
What is the organic product formed in the following sequence of reactions? CH2 (1) HgOAcz + H2O V (2) NaBH4 2) NAB...
1)Draw all alkene prodcuts that could form
2) Circle the major alkene product expected
3) Draw a complete arrow pushing mechanism how the major
product is formed. (Show all srrows, intermediate structures,
formal charges)
2. (19pts) The alcohol dehydration product below is of the El type elimination. (i) Draw all of the alkene products that could possibly form. (ii) Circle the major alkene product expected. (ii) Draw a complete curved arrow-pushing mechanism illustrating how the major product is formed. Be...
Complete the mechanism for the electrophilic addition when the alkene is treated with water in acid.a) Use curved arrows to show the attack on the electrophilic hydrogen by the alkene. b) Complete the structure or the carbocation intermediate by adding the missing positive charge.c) Use a curved arrow to show the attack of the water on the carbocation.
Draw the Major alkene product and minor where indicated. Show
the correct alkene geometry and/or absolute configuration at carbon
stereocenters. (Follow side instructions as asked like on D and
E).
1. (24pts) In the empty boxes, draw the structure of the MAJOR alkene product expected following each E2 reaction. Where indicated, also draw the minor alkene(s) formed. Also, show the correct akene geometry and/or absolute configuration at carbon stereocenters present in any of the products expected. Follow any additional instruction...
37. H0+ (CH3), C CH OH alkene + H2O Draw the structure of the major alkene product of this acid-catalyzed dehydration. (Hint: rearrangement.) 38. alkenes Three alkenes produce butane when treated with hydrogen and platinum. Draw their structures. + H-Br - 39. CH2=CH CH3 CH2-CH-CH, H Br The first step of the mechanism of this reaction produces two carbocations. Draw both and circle the one that is more stable. ODHO Br 11 =C + Br - Br - - Br...
VI. Mechanism. (14) 1. Draw a stepwise electron pushing mechanism to predict the products in the following reduction. Make sure to show the correct locations of any deuterium (D) labels (4) 1. LA EXCESS) Co che le 2 0,09 2. Draw a complete stepwise electron pushing mechanism for the acylation of toluene below. Make sure to clearly indicate the role of the catalyst and how it is regenerated. Also clearly indicate why the methyl substituent directs the cyl group to...
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