Based on the melting point and specific rotation experimental data: a.draw the structure(s) of the product(s)...
Based on the melting point and specific rotation experimental data:
a.draw the structure(s) of the product(s) of the trans-cinnamic acid addition reaction with bromine.
b. State whether the addition of Br2followed asyn or antiaddition or both. Give reasons.
c. Is this product chiral? If so, identify the chirality centers.
d. Is the product of the trans-cinnamic acid addition reaction with bromine optically active? Give reasons.
e. Is your answer to Question 2d what you expected? Give reasons.
f. What is the enantiomeric excess of your product of the trans-cinnamic acid addition reaction with bromine?
g.Can optically inactive reactants make optically active products?
Homework Answers
b. the addition of Br2 followed antiaddition.
c. product is chiral at both the Br attached carbons.
d. the product of the trans-cinnamic acid addition reaction with bromine optically active because achiral carbon is converted to chiral carbon.
g. Can optically inactive reactants make optically active products? answer = No. if the reagent is optically active then the product may be optically active.
Add Answer to:
Based on the melting point and specific rotation experimental
data:
a.draw the structure(s) of the product(s)...
can you help with part b why isn't the product pure based on the melting point???...
can you help
with part b
why isn't the product pure based on the melting point???
for part c the experiment was
Separation of acid/base/neutral compounds using liquid- liquid
extraction of benzocaine-trans-cinnamic acid and biphenyl
what was the purpose of using Na2SO4
estion 6: 100mg of each Acid, Base and Neutral compounds were used. Assuming 70mg mzocaine, 66mg trans-cinnamic acid and 50mg of biphenyl were isolated. a. Calculate % recovery of benzocaine, trans-cinnamic acid and biphenyl respectively. (show your calculation,...
A. Consider the following pairs of structures. Designate each chirality center as (R) or (S) and...
A. Consider the following pairs of structures. Designate each
chirality center as (R) or (S) and identify the
relationship between them by describing them as representing
enantiomers, diastereomers, constitutional isomers, or two
molecules of the same compound. Use handheld molecular models to
check your answers.
B. Tartaric acid
[HO2CCH(OH)CH(OH)CO2H] was an important
compound in the history of stereochemistry. Two naturally occurring
forms of tartaric acid are optically inactive. One optically
inactive form has a melting point of 210 − 212 °...
8. Polarimetry data a. A student took 0.375 g of the product, (S)-phenylsuccinic acid, and dissolved...
8. Polarimetry data a. A student took 0.375 g of the product, (S)-phenylsuccinic acid, and dissolved it in 9.8 mL of acetone. This solution was placed in the observation tube and then the observed rotation was determined. The observed rotation, lobs, was 5.433 i. Given the observed rotation and the pathlength of the polarimeter cell (1 dm), calculate the specific rotation, (a). (1 point) ii. With your answer from 8i, calculate the enantiomeric excess, %ee. Optically pure (5)-(+)-phenylsuccinic acid is...
prelab wants me to draw a mechanism for both pairs. so one mechanism for the 93-95...
prelab wants me to draw a mechanism for both pairs. so one
mechanism for the 93-95 C pair and another mechanism for the
202-204 C pair. Please draw out full mechanism with arrow pushing
please for both!
trans-cinnamic acid Bromination of trans-cinnamic acid can result in the formation of two different pairs of enantiomers (see Figure 4). Fortunately, the pairs of enantiomers have very different melting points. Thus, we can determine the result of this reaction by examining the melting...
Hc VCH Draw the organic product formed when CH3CH2CH2OH is treated with each reagent. a H2S04 (180°C) d SOC12, pyri...
Hc VCH Draw the organic product formed when CH3CH2CH2OH is treated with each reagent. a H2S04 (180°C) d SOC12, pyridine Ig 1) NaH; 2) CH3CH2Br b NaH e PBr3 h 1) TSCI, pyridine; 2) NaSH c HBr f TsCl, pyridine 3. Draw the organic product formed when l-methylcyclohexanol is treaded with each reagent. In some cases, no reaction occurs. a KH c HBr Te NaHCO3 b Nacid HCI f 1) KH; 2) CH3CH2Br Draw two different routes to each of...
Look up and draw the mechanism for the addition of Br2 to double bonds. Reference the...
Look up and draw the mechanism for the addition of Br2 to
double bonds. Reference the source from which you acquired the
mechanism.
Give the IUPAC name of the major product in the above-mentioned
reaction.
Draw the major product of obtained in the addition of Br2 to
stilbene.
Is this isomer chiral? What would be the optical rotation if
this sample was placed in a polarimeter?
Would a student obtain the same product if you started with
cis-stilbene instead of...
Anti tdd 3. Give the major product(s) of the following reactions -all stere ochemistry of any...
Anti tdd 3. Give the major product(s) of the following reactions -all stere ochemistry of any cis/trans or chiral products must be shown properly AND any chiral centers labeled ds Ror S. Circle your product(s). (Do not repeat products so always doublecheck to make sure you did not draw identical structures!) As in lecture, any halogenation X2 of alkenes should be considered to undergo classic Anti-Addition. a. Cyclohexene + Cl2 b. 1-methyl-1-cyclohexene+ Br2 c. trans-2-pentene + Cl2 d. cis-2-pentene +...
Please help with pre-lab questions. Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation...
Please help with pre-lab questions.
Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation of +3.25. Determine the optical purity (%ee) and percent composition of this sample (see Mohrig section 17.4). The specific rotation of pure (+)-2-butanol is +13.0°. 2. The equation for the formation of the diastereomeric salts is shown in the background information (performed in Part A of the procedure). Write this chemical equation in your notebook, then ALSO write a balanced equation for the formation...
Postlab Questions Answer the following questions on a separate sheet or in your lab notebook. Make...
Postlab Questions Answer the following questions on a separate sheet or in your lab notebook. Make sure that the copy page is readable! D) Calculate the percentage yield for both reactions. Show all calculations. 2) What is the color of the reaction at the beginning of reaction? What causes the color? 3) Why do you dissolve maleic acid in diethyl ether and fumaric acid in water? 4) Give the complete reaction mechanisms for the formation of meso and racemic 2,3-...
Draw the structure(s) of the major organic product(s) obtained after workup of the following reaction. NaOH...
Draw the structure(s) of the major organic product(s) obtained after workup of the following reaction. NaOH O-S CH3 excess NH2 workup . You do not have to consider stereochemistry. If no reaction occurs, draw the organic starting material. Draw structure(s) of product(s) after workup to neutralize acid. Include counter-ions, e.g., Nat, I, in your submission, but draw them in their own separate sketcher. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner....
can you help
with part b
why isn't the product pure based on the melting point???
for part c the experiment was
Separation of acid/base/neutral compounds using liquid- liquid
extraction of benzocaine-trans-cinnamic acid and biphenyl
what was the purpose of using Na2SO4
estion 6: 100mg of each Acid, Base and Neutral compounds were used. Assuming 70mg mzocaine, 66mg trans-cinnamic acid and 50mg of biphenyl were isolated. a. Calculate % recovery of benzocaine, trans-cinnamic acid and biphenyl respectively. (show your calculation,...
A. Consider the following pairs of structures. Designate each
chirality center as (R) or (S) and identify the
relationship between them by describing them as representing
enantiomers, diastereomers, constitutional isomers, or two
molecules of the same compound. Use handheld molecular models to
check your answers.
B. Tartaric acid
[HO2CCH(OH)CH(OH)CO2H] was an important
compound in the history of stereochemistry. Two naturally occurring
forms of tartaric acid are optically inactive. One optically
inactive form has a melting point of 210 − 212 °...
8. Polarimetry data a. A student took 0.375 g of the product, (S)-phenylsuccinic acid, and dissolved it in 9.8 mL of acetone. This solution was placed in the observation tube and then the observed rotation was determined. The observed rotation, lobs, was 5.433 i. Given the observed rotation and the pathlength of the polarimeter cell (1 dm), calculate the specific rotation, (a). (1 point) ii. With your answer from 8i, calculate the enantiomeric excess, %ee. Optically pure (5)-(+)-phenylsuccinic acid is...
prelab wants me to draw a mechanism for both pairs. so one
mechanism for the 93-95 C pair and another mechanism for the
202-204 C pair. Please draw out full mechanism with arrow pushing
please for both!
trans-cinnamic acid Bromination of trans-cinnamic acid can result in the formation of two different pairs of enantiomers (see Figure 4). Fortunately, the pairs of enantiomers have very different melting points. Thus, we can determine the result of this reaction by examining the melting...
Hc VCH Draw the organic product formed when CH3CH2CH2OH is treated with each reagent. a H2S04 (180°C) d SOC12, pyridine Ig 1) NaH; 2) CH3CH2Br b NaH e PBr3 h 1) TSCI, pyridine; 2) NaSH c HBr f TsCl, pyridine 3. Draw the organic product formed when l-methylcyclohexanol is treaded with each reagent. In some cases, no reaction occurs. a KH c HBr Te NaHCO3 b Nacid HCI f 1) KH; 2) CH3CH2Br Draw two different routes to each of...
Look up and draw the mechanism for the addition of Br2 to
double bonds. Reference the source from which you acquired the
mechanism.
Give the IUPAC name of the major product in the above-mentioned
reaction.
Draw the major product of obtained in the addition of Br2 to
stilbene.
Is this isomer chiral? What would be the optical rotation if
this sample was placed in a polarimeter?
Would a student obtain the same product if you started with
cis-stilbene instead of...
Anti tdd 3. Give the major product(s) of the following reactions -all stere ochemistry of any cis/trans or chiral products must be shown properly AND any chiral centers labeled ds Ror S. Circle your product(s). (Do not repeat products so always doublecheck to make sure you did not draw identical structures!) As in lecture, any halogenation X2 of alkenes should be considered to undergo classic Anti-Addition. a. Cyclohexene + Cl2 b. 1-methyl-1-cyclohexene+ Br2 c. trans-2-pentene + Cl2 d. cis-2-pentene +...
Please help with pre-lab questions.
Pre-Lab Questions: 1. A sample of 2-butanol has a specific rotation of +3.25. Determine the optical purity (%ee) and percent composition of this sample (see Mohrig section 17.4). The specific rotation of pure (+)-2-butanol is +13.0°. 2. The equation for the formation of the diastereomeric salts is shown in the background information (performed in Part A of the procedure). Write this chemical equation in your notebook, then ALSO write a balanced equation for the formation...
Postlab Questions Answer the following questions on a separate sheet or in your lab notebook. Make sure that the copy page is readable! D) Calculate the percentage yield for both reactions. Show all calculations. 2) What is the color of the reaction at the beginning of reaction? What causes the color? 3) Why do you dissolve maleic acid in diethyl ether and fumaric acid in water? 4) Give the complete reaction mechanisms for the formation of meso and racemic 2,3-...
Draw the structure(s) of the major organic product(s) obtained after workup of the following reaction. NaOH O-S CH3 excess NH2 workup . You do not have to consider stereochemistry. If no reaction occurs, draw the organic starting material. Draw structure(s) of product(s) after workup to neutralize acid. Include counter-ions, e.g., Nat, I, in your submission, but draw them in their own separate sketcher. Draw one structure per sketcher. Add additional sketchers using the drop-down menu in the bottom right corner....
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