Question

Indicate the stereochemical configuration for the tetrahedral centers shown below.

Answer 1

Assign configuration at each chiral center by giving priorities to the groups, that are around the chiral center. Arrow rotating in anticlockwise direction. So, configuration is S Arrow rotating in anticlockwise direction. However, lowest priority group (H) is not in below the plane. So, configuration is R Cl Br 4

Answer 2

S

R

Answer 3

Indicate the stereochemical configuration for the tetrahedral centers shown below. O not a configuration center (S)-2-methylcyclohexan-1-one CI Br O R O S O not a configuration center (R)-1-bromo-1-chloropropane