Answer
The answer is shown in the picture.
Work Step by Step
The Cahn Ingold Prelog (CIP) System is used for naming chiral centers,
1. Prioritize the four groups around a chiral center according to atomic number.
2. Orient the chiral centre such that the 4th priority substituent is pointing away from the viewer
3. Trace the path of priorities 1, 2 and 3.
- If the path traced from 1-2-3 is clockwise, the chiral center is assigned (R)
- If the path traced is counterclockwise, the chiral center is assigned (S)
If the 4th substituent is not pointing away from the viewer, and instead is pointing to the viewer:
3. Trace the path of priorities 1, 2 and 3.
- If the path traced from 1-2-3 is clockwise, the chiral center is assigned (S)
- If the path traced is counterclockwise, the chiral center is assigned (R)
