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 ° C , the other a melting point of 140 ° C . The inactive tartaric acid with a melting point of 210 − 212 ° C can be separated into two optically active forms of tartaric acid with the same melting point ( 168 − 170 ° C ). One optically active tartaric acid has α D 25 = + 12 , and the other, α D 25 = − 12 . All attempts to separate the other inactive tartaric acid (melting point 140 ° C ) into optically active compounds fail.
- Write the three-dimensional structure of the tartaric acid with melting point 140 ° C .
- Write structures for the optically active tartaric acids with melting points of 168 − 170 ° C .
- Can you determine from the formulas which tartaric acid in (b) has a positive rotation and which has a negative rotation?
- What is the nature of the form of tartaric acid with a melting point of 210 − 212 ° C ?
Homework Answers
Identical Species: - when configuration on all the carbon atoms is same in both species.
Entiomers:- when configuration on all the carbon atoms is different in both species.
Daisteromers:- when configuration at least one carbon atom is same and at others is diffferent.
Add Answer to:
A. Consider the following pairs of structures. Designate each
chirality center as (R) or (S) and...
Challenge Problem 5.52 Tartare od OZCCH(OH)CH(OH)COM) was an important compound in the history of stereochemistry, Two...
Challenge Problem 5.52 Tartare od OZCCH(OH)CH(OH)COM) was an important compound in the history of stereochemistry, Two naturally occurring forms of tartaric acid are optically inactive. One optically nactive form has a melting point of 210-212°C, the other has a melting point of 140°C. The inactive tartanic acid with a melting point of 210-212c can be separated into two optically AR +12 active forms of tartanic acid with the same melting point (168-170°c). One optically active tartani adala -12 h and...
Please answer a-f!!! Problem 1: Consider the following pairs of structures. Designate each chirality center as...
Please answer a-f!!!
Problem 1: 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. F Н Br (a) Н and CHs Br Hас, СН H (b) and Br Br F CH3 Н. Br Cн Br and (e) НаС F F CH3 H I Br Нас. CH3 Br (d) and F CH3 н F...
4. Assign R or S configuration to each chiral center in each of the following molecules...
4. Assign R or S configuration to each chiral center in each of the following molecules (A-D). Which are enantiomers and which are diastereoisomer? Hint: redraw the molecules if it makes it easier to visualize or use a modeling kit. H H A В CH Br Hас, Br 'CHs Нo Hас H он Br Br D CHз Hас Н. "CHз но Он CH3
1. For each of the structure star asymmetric carbon atoms, Lab with R and Sand draw...
1. For each of the structure star asymmetric carbon atoms, Lab with R and Sand draw any internal mirror plane of symmetry and label chiral or achiral molecules and meso structures H3C CH2Br OH I Br H -ОН HOH CI Н. TH Br H Br H OH HH CH2Br CH2CH3 a b C Br Br CI CI d СН3 CH3 CH3 ...Н H ОН CHз CHз нас CH3 f е
Handout Stereochemistry 1. Designate each of the chirality centers as R or S. Then identify the...
Handout Stereochemistry 1. Designate each of the chirality centers as R or S. Then identify the relationship between the two molecules as enantiomers, diastereomers, identical, or non-related. Bс нс си, сн, H Br H (e) (a) and and сн н" Вr нс н н Br ис, и нс, H and and Br (b) СH Bе Br HT Br н H Br. Br H CH, Br () Нс and and но Br CH Br НаС. H, Br. CH H- (b) (d)...
Assign R, S configurations to each indicated chirality center in the molecules below. A. OH B....
Assign R, S configurations to each indicated chirality center in the molecules below. A. OH B. COOH НО. ---H co CHANH CH; HAN HO H norepinephrine alaine 0 D. C. H E. HOC OH moje H н. CH3 H2C H НО CO H CH2 tartaric acid dihydrocaryone
Problem 10 Consider the following pair of structures. Designate each chirality center as (R) or (S)...
Problem 10 Consider the following pair 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. CH,CHз CH-CHз pue CH3CH2 CH3CH2
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...
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having trouble with R and S configuration, can someone help out
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17 Br>Cl'7 S"7 F>ONTO77i77 H 1. Determine the configuration (R or S) of each of the following molecules: (Ph phenyl, a benzene ring as a group) CH-CH3 b. CHs с. но NH2 d. он COOH Ph H Hас CH2CH3 H2N CH&CH NH2 NH2 f. Ph CH3 Ph CHs h. H i. OH c lCOOH н.сн,с F Н.с NH2 h. COOH CHs CH2CH H2N 2. Label the...
Select 4 out 6 questions te answer. Clearly circle cach question te be graded. la. Name the following compounds asp...
Select 4 out 6 questions te answer. Clearly circle cach question te be graded. la. Name the following compounds aspe WAVENI e make emical ow funce UND is s CI CH3 H H CH CH3 н (S)- -cls ro - 3 - micilyl be tane B CH2CH2 Br CH3 CH3 с- H "CH3 www CH2Br Но с D Comde b. Which of the above are optically active? Write "none" if there are no options. c. Which of the above are...
Challenge Problem 5.52 Tartare od OZCCH(OH)CH(OH)COM) was an important compound in the history of stereochemistry, Two naturally occurring forms of tartaric acid are optically inactive. One optically nactive form has a melting point of 210-212°C, the other has a melting point of 140°C. The inactive tartanic acid with a melting point of 210-212c can be separated into two optically AR +12 active forms of tartanic acid with the same melting point (168-170°c). One optically active tartani adala -12 h and...
Please answer a-f!!!
Problem 1: 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. F Н Br (a) Н and CHs Br Hас, СН H (b) and Br Br F CH3 Н. Br Cн Br and (e) НаС F F CH3 H I Br Нас. CH3 Br (d) and F CH3 н F...
4. Assign R or S configuration to each chiral center in each of the following molecules (A-D). Which are enantiomers and which are diastereoisomer? Hint: redraw the molecules if it makes it easier to visualize or use a modeling kit. H H A В CH Br Hас, Br 'CHs Нo Hас H он Br Br D CHз Hас Н. "CHз но Он CH3
1. For each of the structure star asymmetric carbon atoms, Lab with R and Sand draw any internal mirror plane of symmetry and label chiral or achiral molecules and meso structures H3C CH2Br OH I Br H -ОН HOH CI Н. TH Br H Br H OH HH CH2Br CH2CH3 a b C Br Br CI CI d СН3 CH3 CH3 ...Н H ОН CHз CHз нас CH3 f е
Handout Stereochemistry 1. Designate each of the chirality centers as R or S. Then identify the relationship between the two molecules as enantiomers, diastereomers, identical, or non-related. Bс нс си, сн, H Br H (e) (a) and and сн н" Вr нс н н Br ис, и нс, H and and Br (b) СH Bе Br HT Br н H Br. Br H CH, Br () Нс and and но Br CH Br НаС. H, Br. CH H- (b) (d)...
Assign R, S configurations to each indicated chirality center in the molecules below. A. OH B. COOH НО. ---H co CHANH CH; HAN HO H norepinephrine alaine 0 D. C. H E. HOC OH moje H н. CH3 H2C H НО CO H CH2 tartaric acid dihydrocaryone
Problem 10 Consider the following pair 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. CH,CHз CH-CHз pue CH3CH2 CH3CH2
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...
having trouble with R and S configuration, can someone help out
with this sheet?
17 Br>Cl'7 S"7 F>ONTO77i77 H 1. Determine the configuration (R or S) of each of the following molecules: (Ph phenyl, a benzene ring as a group) CH-CH3 b. CHs с. но NH2 d. он COOH Ph H Hас CH2CH3 H2N CH&CH NH2 NH2 f. Ph CH3 Ph CHs h. H i. OH c lCOOH н.сн,с F Н.с NH2 h. COOH CHs CH2CH H2N 2. Label the...
Select 4 out 6 questions te answer. Clearly circle cach question te be graded. la. Name the following compounds aspe WAVENI e make emical ow funce UND is s CI CH3 H H CH CH3 н (S)- -cls ro - 3 - micilyl be tane B CH2CH2 Br CH3 CH3 с- H "CH3 www CH2Br Но с D Comde b. Which of the above are optically active? Write "none" if there are no options. c. Which of the above are...
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