Which of the following statements is true for a pair of ENANTIOMERS? A) they will have identical physiological properties. B) they will have specific rotations of opposite sign. C) they will have different molar masses. D) they will have different physical properties.

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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**Question:**
Which of the following statements is true for a pair of **ENANTIOMERS**?

A) They will have identical physiological properties.

B) They will have specific rotations of opposite sign.

C) They will have different molar masses.

D) They will have different physical properties.

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**Explanation of Terms:**

- **Enantiomers:** Enantiomers are pairs of molecules that are mirror images of each other, but cannot be superimposed onto each other. They are a type of stereoisomer commonly found in organic chemistry. 

- **Specific Rotation:** This term refers to the direction and degree to which a chiral compound rotates plane-polarized light. Enantiomers will rotate light in equal magnitude but opposite directions (one clockwise and the other counterclockwise).

**Key Insights:**

- While enantiomers have identical molecular weights and most physical properties, they have different interactions with plane-polarized light, making option B the correct statement. They typically cannot be distinguished by their physical properties, except for their optical activity and interaction with other chiral environments, including biological systems.

**Correct Answer:** B) They will have specific rotations of opposite sign.
Transcribed Image Text:Here is the transcribed text for use on an educational website: --- **Question:** Which of the following statements is true for a pair of **ENANTIOMERS**? A) They will have identical physiological properties. B) They will have specific rotations of opposite sign. C) They will have different molar masses. D) They will have different physical properties. --- **Explanation of Terms:** - **Enantiomers:** Enantiomers are pairs of molecules that are mirror images of each other, but cannot be superimposed onto each other. They are a type of stereoisomer commonly found in organic chemistry. - **Specific Rotation:** This term refers to the direction and degree to which a chiral compound rotates plane-polarized light. Enantiomers will rotate light in equal magnitude but opposite directions (one clockwise and the other counterclockwise). **Key Insights:** - While enantiomers have identical molecular weights and most physical properties, they have different interactions with plane-polarized light, making option B the correct statement. They typically cannot be distinguished by their physical properties, except for their optical activity and interaction with other chiral environments, including biological systems. **Correct Answer:** B) They will have specific rotations of opposite sign.
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