A mixture of a pair of enantiomers has 30% ee. The observed rotation of this mixture is +15º, and it is known by experiment that the (‐)‐enantiomer has the (R) configuration. (enantiomer excess (ee) = % one enantiomer – % the other enantiomer)

(a) Calculate the percentage of (R) and (S) enantiomers of the natural product.

(b) What is the optical rotation of a mixture of 20% (S) and 80% (R).

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Calculations with Enantiomeric Percentages concept. You can view video lessons to learn Calculations with Enantiomeric Percentages. Or if you need more Calculations with Enantiomeric Percentages practice, you can also practice Calculations with Enantiomeric Percentages practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty of*A mixture of a pair of enantiomers has 30% ee. The observed ...*as medium difficulty.

How long does this problem take to solve?

Our expert Organic tutor, Jonathan took 5 minutes and 5 seconds to solve this problem. You can follow their steps in the video explanation above.