QQuestionChemistry
QuestionChemistry
Which of the following is true of any (S)-enantiomer?
A. It rotates plane-polarized light to the left.
B. It is the mirror image of the corresponding (R)-enantiomer.
C. It rotates plane-polarized light to the right.
D. It has the highest priority group on the left.
E. It is a racemic form.
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Answer
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Step 1:I'll solve this step by step, focusing on the key concepts of stereochemistry and enantiomers.
Step 2:: Understanding Enantiomers
Enantiomers are stereoisomers that are mirror images of each other. They have identical physical properties except for their ability to rotate plane-polarized light in opposite directions.
Step 3:: Defining (S) and (R) Configurations
- The (R) and (S) designations are based on the Cahn-Ingold-Prelog (CIP) priority rules - These configurations describe the three-dimensional arrangement of substituents around a chiral center
Step 4:: Analyzing the Rotation of Plane-Polarized Light
- An (S)-enantiomer rotates plane-polarized light to the right (clockwise) - An (R)-enantiomer rotates plane-polarized light to the left (counterclockwise)
Step 5:: Examining the Given Options
A. Incorrect: (S)-enantiomers rotate plane-polarized light to the right B. Correct: It is the mirror image of the corresponding (R)-enantiomer C. Incorrect: This describes the (R)-enantiomer, not the (S)-enantiomer D. Incorrect: Relates to CIP priority rules, not a defining characteristic of (S)-enantiomers E. Incorrect: A racemic form contains equal amounts of (R) and (S) enantiomers
Final Answer
It is the mirror image of the corresponding (R)-enantiomer.
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