Chemistry
Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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### Structure of Sucrose - Pyranose Ring Explanation #### Diagram Explanation: The image shows the structural formula of sucrose, a disaccharide composed of glucose and fructose units linked together. - **Top Ring (Fructose Unit)**: - The top ring represents a furanose form of fructose. - Key groups include CH2OH (hydroxymethyl) and multiple hydroxyl groups (OH) attached to the carbon atoms in the ring structure. - **Bottom Ring (Glucose Unit)**: - The bottom ring is a pyranose form of glucose. - Likewise, it also has hydroxyl groups (OH) and a CH2OH group attached to carbon atoms. #### Detailed Description: In this diagram, the top five-membered ring is fructose, often depicted in its furanose form. The six-membered ring below is glucose in its pyranose form. Sucrose's structure shows that these two rings are connected by an oxygen bridge, which links the anomeric carbon of glucose (C1) to the anomeric carbon of fructose (C2). #### Key Term: - **Pyranose**: A six-membered ring form of glucose, where five carbons and one oxygen atom form the ring, typically seen in sugars. This structure is more stable and prevalent in nature. #### Context: Understanding the chemical structure of sucrose helps in various educational fields, including biochemistry, nutrition, and organic chemistry. This detailed depiction is essential for students learning about carbohydrate chemistry, helping them visualize and comprehend the molecular makeup of common sugars like sucrose.
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Transcribed Image Text:### Structure of Sucrose - Pyranose Ring Explanation #### Diagram Explanation: The image shows the structural formula of sucrose, a disaccharide composed of glucose and fructose units linked together. - **Top Ring (Fructose Unit)**: - The top ring represents a furanose form of fructose. - Key groups include CH2OH (hydroxymethyl) and multiple hydroxyl groups (OH) attached to the carbon atoms in the ring structure. - **Bottom Ring (Glucose Unit)**: - The bottom ring is a pyranose form of glucose. - Likewise, it also has hydroxyl groups (OH) and a CH2OH group attached to carbon atoms. #### Detailed Description: In this diagram, the top five-membered ring is fructose, often depicted in its furanose form. The six-membered ring below is glucose in its pyranose form. Sucrose's structure shows that these two rings are connected by an oxygen bridge, which links the anomeric carbon of glucose (C1) to the anomeric carbon of fructose (C2). #### Key Term: - **Pyranose**: A six-membered ring form of glucose, where five carbons and one oxygen atom form the ring, typically seen in sugars. This structure is more stable and prevalent in nature. #### Context: Understanding the chemical structure of sucrose helps in various educational fields, including biochemistry, nutrition, and organic chemistry. This detailed depiction is essential for students learning about carbohydrate chemistry, helping them visualize and comprehend the molecular makeup of common sugars like sucrose.
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