Stereochemistry R/S Quiz Form
Test your knowledge of assigning R/S configuration in stereochemistry. Please answer all questions to the best of your ability.
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Standard R/S Assignment
Fischer Projections
Cyclic Compounds
Advanced Scenarios
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Which configuration does the following chiral center have: CH3-CH(Br)(Cl)(F)?
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R
S
Cannot determine
Select all statements that correctly describe the Cahn-Ingold-Prelog rules for R/S assignment.
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Assign priorities based on atomic number.
Double bonds are treated as two single bonds.
Lowest priority group should be oriented away from the viewer.
Hydrogen always has the highest priority.
Assign R or S configuration to the following Fischer projection: (Top: Br, Bottom: H, Left: OH, Right: CH3)
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R
S
Not chiral
Identify the configuration (R or S) for each center in the following molecules:
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Rows
Configuration
2-butanol (CH3CH(OH)CH2CH3)
R
S
Not chiral
Lactic acid (CH3CH(OH)COOH)
R
S
Not chiral
Bromochlorofluoromethane (CHBrClF)
R
S
Not chiral
Briefly explain one common mistake students make when assigning R/S configuration.
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