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R and S of Fischer Projections

5. Chirality / R and S of Fischer Projections / Problem 2

For each of the following Fischer projections, identify and label the (R) or (S) configurations of asymmetric carbon atoms.

A

Structure (a) has R configuration while structure (b) has R,S configuration

B

Structure (a) has S configuration while structure (b) has S,S configuration

C

Structure (a) has no asymmetric carbon while structure (b) has R,S configuration

D

Structure (a) has no asymmetric carbon while structure (b) has S,S configuration

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