Chapter 5: Q.57 (page 209)
Draw the enantiomer and a diastereomer for each compound.
a.
b.
c.
Short Answer
a.
b.
c.
Chapter 5: Q.57 (page 209)
Draw the enantiomer and a diastereomer for each compound.
a.
b.
c.
a.
b.
c.
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Get started for freeDraw all the possible stereoisomers for each compound and label pairs of enantiomers and diastereomers.
a.
b.
Label each pair of compounds as constitutional isomers, stereoisomers, or not isomers of each other.
(S)-Lactic acid has a specific rotation of +3.8. (a) If the ee of a solution of lactic acid is 60%, what isthis solution? (b) How much of a dextrorotatory and levorotatory isomer does the solution contain?
The amino acid (S)-alanine has the physical characteristics listed under the structure.
a. What is the melting point of (R)-alanine?
b. How does the melting point of a racemic mixture of (R)- and (S)-alanine compare to the melting point of (S)-alanine?
c. What is the specific rotation of (R)-alanine, recorded under the same conditions as the reported rotation of (S)-alanine?
d. What is the optical rotation of a racemic mixture of (R)- and (S)-alanine?
e. Label each of the following as optically active or inactive: a solution of pure (S)-alanine; an equal mixture of (R)- and (S)-alanine; a solution that contains 75% (S)- and 25% (R)-alanine.
Locate the stereogenic centers in each Newman projection and label each center as R or S.
a.
b.
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