If acetophenone was reduced using NaBH4 rather than CBS reagent, a racemic mixture of (±)-1-phenylethanol would be obtai...
If acetophenone was reduced using NaBH4 rather than CBS reagent, a racemic mixture of (±)-1-phenylethanol would be obtained. How would you isolate pure R-(+)-1-phenylethanol from this mixture?
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If acetophenone was reduced using NaBH4 rather than CBS reagent, a racemic mixture of (±)-1-phenylethanol would be obtai...
Experiment: Lab goals Isolate an enantiopure sample of phenylsuccinic acid from a racemic mixture Assess the...
Experiment:
Lab goals
Isolate an enantiopure sample of phenylsuccinic acid from a
racemic mixture
Assess the enantiopurity of the recovered material using
polarimetry experiment
Procedure
1. Selectively preiciptate the (+) enantiomer of phenylsuccinic
acid using L(–) proline resolving agent
2. Remove the (–) proline (resolving agent) from the
precipitate by washing with acid solution (HCl)
3. Determine the enantiomeric excess of (+)-phenylsuccinic acid
in the precipitate using polarimetry
4. Collect your enantiomerically enriched product in the
(+)-phenylsuccinic acid container
If...
(Dehydration of Alcohols)1-what would be the result of using 3-heptanol rather than cyclohexanol as a starting...
(Dehydration of Alcohols)1-what would be the result of using 3-heptanol rather than cyclohexanol as a starting material for reaction?2-what additional problems would be encountered if 3-heptanol is used? 3-what is the purification process for that mixture?
tylphenylmethanol from benzaldehyde (Ph-CHO) (g) cyclopentylphenylm ctan-1-ol from 1-bromohexane (h) octan-1-olf ou would accomplish the following...
tylphenylmethanol from benzaldehyde (Ph-CHO) (g) cyclopentylphenylm ctan-1-ol from 1-bromohexane (h) octan-1-olf ou would accomplish the following transformations. You may use any additional reagents you ne Show how you would ac A (b) SO3 CH.CH,CH; H OH (racemic) OH O о OH CI_cuci (e) CH, --C-CH2CH2-C-OCH,CH, → CH-CH-CH,CH, ---OCH,CH, O o OH OH ) CH-C-CH.CH-C-OCH,CH, - CH -CH-CH2CH.-CH, Show how you would synthesize the following: Prenylethanol by the addition of formaldehyde to a suitable Grignard reagent D 2-phenylethanol from a suitable...
How do I know whether the diol was meso or racemic using the NMR spectrum? Do...
How do I know whether the diol was meso or racemic using the NMR
spectrum? Do we need to see the NMR spectrum of the acetonide
product? How do they different between the compounds from meso and
racemic?
The Synthesis of 2,2-Dimethyl-1,5- Dioxolane; The Acetonide Derivative of a Vicinal Diol PRELAB EXERCISE: Draw the most stable structures of meso- and racemic-1,2-stilbenediol using Newman projections. Draw the same two isomers with the hydroxyl groups eclipsed. In Chapter 55, yellow benzil was...
How would you synthesize this molecule using any reagent that is no more than 2 carbons...
How would you synthesize this molecule using any reagent that is
no more than 2 carbons in length??
IZ
ootical for pure substance is +40 1. As the new chemist working at "Drugs Us", you...
ootical for pure substance is +40
1. As the new chemist working at "Drugs Us", you are given the task of resolving racemic phenylethyl- amine into its individual enantiomers using (S)-malic acid as resolving agent. After you carried out the resolution, you labeled the products you isolated "Sample A" and "Sample B. You subjected both samples to polarimetry ( = 589 nm (sodium D-line), 1-dm cell) and obtained the following results. Sample A: 1.00 g dissolved in 10.0 mL methanol...
1. Why do you think alkenes would rather undergo catalytic hydrogenation by syn addition rather than...
1. Why do you think alkenes would rather undergo catalytic hydrogenation by syn addition rather than anti addition? Support your answer with an example. (4 pts) 2. What does the word stereoselectivity mean and how does it apply to the catalytic hydrogenation of alkenes? (2 pts) 3. What is the correlation between the heat of hydrogenation of an alkene and its degree of substitution? (2 pts)
Sodium Borohydride Reduction of Benzoin Pre-Lab Worksheet (1) Why is it important to use 100% ethanol...
Sodium Borohydride Reduction of Benzoin Pre-Lab
Worksheet
(1) Why is it important to use 100% ethanol for this reaction? 5, ethanol (absolute ethanol) rather than 95% of benzoin? ow would you expect the IR spectrum of the reduced product to differ from that 7. (2) How would you expect the 1H rom that of benzNMR spectrum of the reduced product to differ 8. (2) How many peaks do you expect in the 13C NMR spectrum of the product? Suppose you...
PROBLEMS 1. How would using a ratio scale (rather than a linear scale) affect Figure 1.1?...
PROBLEMS 1. How would using a ratio scale (rather than a linear scale) affect Figure 1.1? How fast would a country have to be growing in order to double its output in nine years? You should aswer this question using the rule of 72, not a calculator. 3. Suppose that in a particular country, GDP per capita was $1,000 in 1900 and $4,000 in 1948. Using the rule of 72 (not a calculator), approximate the annual growth rate of GDP...
PROBLEMS 1. How would using a ratio scale (rather than a linear scale) affect Figure 1.1?...
PROBLEMS 1. How would using a ratio scale (rather than a linear scale) affect Figure 1.1? 2. How fast would a country have to be growing in order to double its output in nine years? You should answer this question using the rule of 72, not calculator 3. Suppose that in a particular country, GDP per capita was $1,000 in 1900 and $4,000 in 1948. Using the rule of 72 (not a calculator), approximate the annual growth rate of GDP...
Experiment:
Lab goals
Isolate an enantiopure sample of phenylsuccinic acid from a
racemic mixture
Assess the enantiopurity of the recovered material using
polarimetry experiment
Procedure
1. Selectively preiciptate the (+) enantiomer of phenylsuccinic
acid using L(–) proline resolving agent
2. Remove the (–) proline (resolving agent) from the
precipitate by washing with acid solution (HCl)
3. Determine the enantiomeric excess of (+)-phenylsuccinic acid
in the precipitate using polarimetry
4. Collect your enantiomerically enriched product in the
(+)-phenylsuccinic acid container
If...
(Dehydration of Alcohols)1-what would be the result of using 3-heptanol rather than cyclohexanol as a starting material for reaction?2-what additional problems would be encountered if 3-heptanol is used? 3-what is the purification process for that mixture?
tylphenylmethanol from benzaldehyde (Ph-CHO) (g) cyclopentylphenylm ctan-1-ol from 1-bromohexane (h) octan-1-olf ou would accomplish the following transformations. You may use any additional reagents you ne Show how you would ac A (b) SO3 CH.CH,CH; H OH (racemic) OH O о OH CI_cuci (e) CH, --C-CH2CH2-C-OCH,CH, → CH-CH-CH,CH, ---OCH,CH, O o OH OH ) CH-C-CH.CH-C-OCH,CH, - CH -CH-CH2CH.-CH, Show how you would synthesize the following: Prenylethanol by the addition of formaldehyde to a suitable Grignard reagent D 2-phenylethanol from a suitable...
How do I know whether the diol was meso or racemic using the NMR
spectrum? Do we need to see the NMR spectrum of the acetonide
product? How do they different between the compounds from meso and
racemic?
The Synthesis of 2,2-Dimethyl-1,5- Dioxolane; The Acetonide Derivative of a Vicinal Diol PRELAB EXERCISE: Draw the most stable structures of meso- and racemic-1,2-stilbenediol using Newman projections. Draw the same two isomers with the hydroxyl groups eclipsed. In Chapter 55, yellow benzil was...
How would you synthesize this molecule using any reagent that is
no more than 2 carbons in length??
IZ
ootical for pure substance is +40
1. As the new chemist working at "Drugs Us", you are given the task of resolving racemic phenylethyl- amine into its individual enantiomers using (S)-malic acid as resolving agent. After you carried out the resolution, you labeled the products you isolated "Sample A" and "Sample B. You subjected both samples to polarimetry ( = 589 nm (sodium D-line), 1-dm cell) and obtained the following results. Sample A: 1.00 g dissolved in 10.0 mL methanol...
1. Why do you think alkenes would rather undergo catalytic hydrogenation by syn addition rather than anti addition? Support your answer with an example. (4 pts) 2. What does the word stereoselectivity mean and how does it apply to the catalytic hydrogenation of alkenes? (2 pts) 3. What is the correlation between the heat of hydrogenation of an alkene and its degree of substitution? (2 pts)
Sodium Borohydride Reduction of Benzoin Pre-Lab
Worksheet
(1) Why is it important to use 100% ethanol for this reaction? 5, ethanol (absolute ethanol) rather than 95% of benzoin? ow would you expect the IR spectrum of the reduced product to differ from that 7. (2) How would you expect the 1H rom that of benzNMR spectrum of the reduced product to differ 8. (2) How many peaks do you expect in the 13C NMR spectrum of the product? Suppose you...
PROBLEMS 1. How would using a ratio scale (rather than a linear scale) affect Figure 1.1? How fast would a country have to be growing in order to double its output in nine years? You should aswer this question using the rule of 72, not a calculator. 3. Suppose that in a particular country, GDP per capita was $1,000 in 1900 and $4,000 in 1948. Using the rule of 72 (not a calculator), approximate the annual growth rate of GDP...
PROBLEMS 1. How would using a ratio scale (rather than a linear scale) affect Figure 1.1? 2. How fast would a country have to be growing in order to double its output in nine years? You should answer this question using the rule of 72, not calculator 3. Suppose that in a particular country, GDP per capita was $1,000 in 1900 and $4,000 in 1948. Using the rule of 72 (not a calculator), approximate the annual growth rate of GDP...
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