Textbook Question
What is the main structural difference between a. amylose and cellulose?
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Ch. 20 - The Organic Chemistry of Carbohydrates
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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Table of contents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 1)31
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding (Part 2)65
- Ch. 2 - Acids and Bases: Central to Understanding Organic Chemistry84
- Ch. 3 - An Introduction to Organic Compounds:Nomenclature, Physical Properties, and Structure183
- Ch. 4 - Isomers: The Arrangement of Atoms in Space121
- Ch. 5 - Alkenes: Structure, Nomenclature, and an Introduction to Reactivity • Thermodynamics and Kinetics83
- Ch. 6 - The Reactions of Alkenes • The Stereochemistry of Addition Reactions175
- Ch. 7 - The Reactions of Alkynes • An Introduction to Multistep Synthesis119
- Ch. 8 - Delocalized Electrons: Their Effect on Stability, pKa, and the Products of a Reaction • Aromaticity and Electronic Effects: An Introduction to the Reactions of Benzene148
- Ch. 9 - Substitution and Elimination Reactions of Alkyl Halides212
- Ch. 10 - Reactions of Alcohols, Ethers, Epoxides, Amines, and Sulfur-Containing Compounds131
- Ch. 11 - Organometallic Compounds60
- Ch. 12 - Radicals90
- Ch. 13 - Mass Spectrometry; Infrared Spectroscopy; UV/Vis Spectroscopy62
- Ch. 14 - NMR Spectroscopy95
- Ch. 15 - Reactions of Carboxylic Acids and Carboxylic Acid Derivatives123
- Ch. 16 - Reactions of Aldehydes and Ketones • More Reactions of Carboxylic Acid Derivatives141
- Ch. 17 - Reactions at the Alpha-Carbon101
- Ch. 18 - Reactions of Benzene and Substituted Benzenes144
- Ch. 19 - More About Amines • Reactions of Heterocyclic Compounds49
- Ch. 20 - The Organic Chemistry of Carbohydrates80
- Ch. 21 - Amino Acids, Peptides, and Proteins57
- Ch. 22 - Catalysis in Organic Reactions and in Enzymatic Reactions35
- Ch. 23 - The Organic Chemistry of the Coenzymes—Compounds Derived from Vitamins1
- Ch. 28 - Pericyclic Reactions58
Chapter 21, Problem 30b
b. Identify the glycosidic linkage that connects the sugars.
Verified step by step guidance1
Examine the structure of the disaccharide or polysaccharide provided. Identify the two monosaccharide units that are connected to form the glycosidic bond.
Determine the anomeric carbon of the first sugar (the carbon that was part of the carbonyl group in the open-chain form). This is typically the carbon bonded to two oxygen atoms in the cyclic form.
Identify the hydroxyl group on the second sugar that is involved in the glycosidic bond. This is usually one of the hydroxyl groups attached to a non-anomeric carbon.
Analyze the stereochemistry of the glycosidic bond. Determine whether the bond is in the α (alpha) configuration (the anomeric oxygen is trans to the CH₂OH group) or the β (beta) configuration (the anomeric oxygen is cis to the CH₂OH group).
Specify the position of the glycosidic linkage by noting the carbon numbers of the two sugars involved in the bond (e.g., 1→4, 1→6). Combine this with the stereochemistry (α or β) to fully describe the glycosidic linkage.
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Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Glycosidic Linkage
A glycosidic linkage is a type of covalent bond that forms between two monosaccharides through a dehydration reaction, where a water molecule is released. This bond connects the anomeric carbon of one sugar to a hydroxyl group of another, resulting in the formation of disaccharides or polysaccharides. Understanding this linkage is crucial for analyzing carbohydrate structures and their functions.
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Predict the structure of the glycoside products
Monosaccharides
Monosaccharides are the simplest form of carbohydrates, consisting of single sugar units like glucose, fructose, and galactose. They serve as the building blocks for more complex carbohydrates. Recognizing the structure and properties of monosaccharides is essential for understanding how they combine to form glycosidic linkages and larger carbohydrate molecules.
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Dehydration Synthesis
Dehydration synthesis is a chemical reaction that involves the removal of a water molecule to form a new bond between two molecules. In the context of glycosidic linkages, this process allows monosaccharides to join together, creating larger carbohydrate structures. Grasping this concept is vital for comprehending how carbohydrates are formed and how their structures influence their biological roles.
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Related Practice
Textbook Question
Name the following compounds and indicate whether or not each is a reducing sugar:
c.
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Textbook Question
What is the specific rotation of an equilibrium mixture of fructose? (Hint: Recall that the specific rotation of an equilibrium mixture of glucose is +52.7.)
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Textbook Question
What is the main structural difference between c. amylopectin and glycogen?
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Textbook Question
a. Identify the sugars in amygdalin.
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Textbook Question
What is the main structural difference between b. amylose and amylopectin?
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