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Use the following problems for the quiz on stereochemistry.
A. For the following pairs of compounds choose one of the following responses and
place it to the right of the pair.. Same, Constitutional Isomers, Enantiomers,
Diastereomers, Different, Conformers. (3 points each)
1
2
Br
CH3
H
Cl
CH3
H
Cl
H
H
CH3
CH3
3
Br
CH3
Br
H
Br
H
CH3
Br
H
H
Br
CH3
CH3
4
CH3
H3C
CH3
H 3C
5
Br
Br
Br
Br
6
CH3
CH3
CH3
H3C
7
Br
Br
H
CH3
H3C
H
H
CH3
H3C
Cl
Br
Cl
8
H
Br
Cl
H2
C
C
CH3
H 3C
H2
C
CH
H3C
C
H
CH
CH3
H 3C
CH3
9
Br
H
Cl
CH3
CH3
CH3
H
Cl
H
H
CH3
Br
B. Draw 1,3-dimethylcyclohexane in the most unstable conformation and assign the
stereochemistry to all stereocenters. Use this information to answer quiz
questions.(5 pts)
C. A sample of tartaric acid is found to be 80% enantiomeric excess in the S isomer.
Calculate the percent R and the percent S in the sample (3 points)
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