Question

What is the R and S configuration for each stereogenic center in this sugar from top to bottom?

• A. R, R, S
• B. R, S, R
• C. S, S, R
• D. S, R, R

Hint:

To determine R and S configurations, prioritize the substituents at each stereogenic center, and apply the Cahn-Ingold-Prelog rules.

Answer 1

The Correct Option is B

Step 1: Identify the stereogenic centers.
Determine the priorities of the substituents attached to each chiral carbon, then use the Cahn-Ingold-Prelog rules to assign the R or S configuration.
Step 2: Conclusion.
Thus, the R and S configuration from top to bottom is R, S, R.
Final Answer: \[ \boxed{R, S, R} \]