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Which of the following molecules is optically active? CH3 CH; CH3 CH3

Which of the following molecules is optically active? CH3 CH; CH3 CH3

Chemistry
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 molecules is optically active? **Options:** 1. A molecule with a chiral carbon bound to three different groups and one lone hydrogen (CH₃, wedge and dash bonds visible). 2. A longer carbon chain with one chiral center denoted by a wedge and dash, including a CH₃ group. 3. A cyclohexane ring with two methyl (CH₃) groups attached at different positions. **Explanation of Diagrams:** - **First Molecule:** - Features a single chiral center, indicated by a wedge and a dash for bonds, suggesting potential optical activity. - **Second Molecule:** - Contains a chiral center marked by a wedge and dash at different points along the carbon chain. This chiral center contributes to its optical activity. - **Third Molecule:** - Shows a cyclic structure with two substituents. The symmetry of the cyclohexane means there's no chiral center. **Note:** Optical activity in compounds arises when there is a non-superimposable mirror image, often due to the presence of a chiral center (asymmetric carbon atom).
Transcribed Image Text:**Question:** Which of the following molecules is optically active? **Options:** 1. A molecule with a chiral carbon bound to three different groups and one lone hydrogen (CH₃, wedge and dash bonds visible). 2. A longer carbon chain with one chiral center denoted by a wedge and dash, including a CH₃ group. 3. A cyclohexane ring with two methyl (CH₃) groups attached at different positions. **Explanation of Diagrams:** - **First Molecule:** - Features a single chiral center, indicated by a wedge and a dash for bonds, suggesting potential optical activity. - **Second Molecule:** - Contains a chiral center marked by a wedge and dash at different points along the carbon chain. This chiral center contributes to its optical activity. - **Third Molecule:** - Shows a cyclic structure with two substituents. The symmetry of the cyclohexane means there's no chiral center. **Note:** Optical activity in compounds arises when there is a non-superimposable mirror image, often due to the presence of a chiral center (asymmetric carbon atom).
### Chemical Structure Diagrams 1. **Diagram 1:** - **Description:** This structure represents a linear alkane in a zig-zag formation, common in organic chemistry representations. It includes two methyl groups (CH₃) attached at opposite ends. 2. **Diagram 2:** - **Description:** This structure shows a cyclobutane ring with two substituents. One methyl group (CH₃) is attached with a wedge bond indicating it is coming out of the plane, and another methyl group is represented with a dashed bond indicating it is going into the plane. This denotes stereochemistry, specifying the 3D orientation of the groups. 3. **Diagram 3:** - **Description:** This structure depicts a cyclopentane ring. Two methyl groups are attached on opposite carbon atoms, one with a wedge bond (out of the plane) and the other with a dashed bond (into the plane), also indicating stereochemistry. Each diagram includes a selection checkbox, suggesting an interactive component, potentially for quizzes or assessments. The structures are shaded differently, possibly for educational emphasis.
Transcribed Image Text:### Chemical Structure Diagrams 1. **Diagram 1:** - **Description:** This structure represents a linear alkane in a zig-zag formation, common in organic chemistry representations. It includes two methyl groups (CH₃) attached at opposite ends. 2. **Diagram 2:** - **Description:** This structure shows a cyclobutane ring with two substituents. One methyl group (CH₃) is attached with a wedge bond indicating it is coming out of the plane, and another methyl group is represented with a dashed bond indicating it is going into the plane. This denotes stereochemistry, specifying the 3D orientation of the groups. 3. **Diagram 3:** - **Description:** This structure depicts a cyclopentane ring. Two methyl groups are attached on opposite carbon atoms, one with a wedge bond (out of the plane) and the other with a dashed bond (into the plane), also indicating stereochemistry. Each diagram includes a selection checkbox, suggesting an interactive component, potentially for quizzes or assessments. The structures are shaded differently, possibly for educational emphasis.
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