Question

Which of the following combinations amongst the four Fischer projections represents the same absolute configurations?

• A. II and III
• B. I and IV
• C. II and IV
• D. III and IVs

Answer 1

The correct option is C II and IV

The given compound is in Fischer projection. To assign absolut configuration priority for the group should be given according to their atomic number/mass.

From the figure, we can see projection (II) and (IV) has 'R' absolute configuration and (I) and (III) has 'S' absolute configuration. Thus, option (c) is correct.