Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Starch
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Mutarotation
The rotation of a particular structure of the chiral compound because of the epimerization is called mutarotation. It is the repercussion of the ring chain tautomerism. In terms of glucose, this can be defined as the modification in the equilibrium of th…
L Sugar
A chemical compound that is represented with a molecular formula C6H12O6 is called L-(-) sugar. At the carbon’s 5th position, the hydroxyl group is placed to the compound’s left and therefore the sugar is represented as L(-)-sugar. It is capable of rotat…
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Fischer projections for 2 D-aldohexose

**Title:** Drawing Fischer Projections for D-aldoses with Specific Stereochemistry **Instructions:** Draw Fischer projections for the two **D-aldohexoses** whose stereochemistry at **C3, C4, and C5** is the same as that of **D-arabinose at C2, C3, and C4**. - **Guidelines:** - You may draw your Fischer projection without using wedged or hashed bonds. Align the Fischer projection vertically, e.g., \[ \begin{array}{c} \text{O}\\ \mid\\ \text{H}\\ \mid\\ \text{OH}\\ \mid\\ \text{H}\\ \mid\\ \text{OH}\\ \mid\\ \text{H}\\ \mid\\ \text{OH} \end{array} \] - **Show explicitly** the bonds to any hydrogens attached to chiral carbons. Do not show bonds to other hydrogens. - A start structure for you to modify is provided in the sketcher below. **Diagrams:** 1. **Sketcher Interface:** - Provides tools like a pencil, eraser, and templates for drawing and modifying molecular structures. - Contains two editable panels for sketching, each starting with incorrect carbon chains labeled with "CH₃" - The panels both show a repetitive chain of methyl groups (H₃C) connected linearly which needs modification to represent D-aldohexoses. - Models should be redrawn to display: - Correct carbon backbone. - Hydroxyl group orientation at the specified chiral centers. **Navigation:** - Use the "Previous" and "Next" buttons to navigate through the sketches. - Options to "Copy" and "Paste" structures are available. - Click "Email Instructor" to send your completed work or "Save and Exit" to finish. **Note:** Ensure to follow the specific stereochemistry as instructed to achieve the correct molecular configuration.
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Transcribed Image Text:**Title:** Drawing Fischer Projections for D-aldoses with Specific Stereochemistry **Instructions:** Draw Fischer projections for the two **D-aldohexoses** whose stereochemistry at **C3, C4, and C5** is the same as that of **D-arabinose at C2, C3, and C4**. - **Guidelines:** - You may draw your Fischer projection without using wedged or hashed bonds. Align the Fischer projection vertically, e.g., \[ \begin{array}{c} \text{O}\\ \mid\\ \text{H}\\ \mid\\ \text{OH}\\ \mid\\ \text{H}\\ \mid\\ \text{OH}\\ \mid\\ \text{H}\\ \mid\\ \text{OH} \end{array} \] - **Show explicitly** the bonds to any hydrogens attached to chiral carbons. Do not show bonds to other hydrogens. - A start structure for you to modify is provided in the sketcher below. **Diagrams:** 1. **Sketcher Interface:** - Provides tools like a pencil, eraser, and templates for drawing and modifying molecular structures. - Contains two editable panels for sketching, each starting with incorrect carbon chains labeled with "CH₃" - The panels both show a repetitive chain of methyl groups (H₃C) connected linearly which needs modification to represent D-aldohexoses. - Models should be redrawn to display: - Correct carbon backbone. - Hydroxyl group orientation at the specified chiral centers. **Navigation:** - Use the "Previous" and "Next" buttons to navigate through the sketches. - Options to "Copy" and "Paste" structures are available. - Click "Email Instructor" to send your completed work or "Save and Exit" to finish. **Note:** Ensure to follow the specific stereochemistry as instructed to achieve the correct molecular configuration.
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