Domanda del libro di testo
b. Identify the glycosidic linkage that connects the sugars.
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Ch. 20 - The Organic Chemistry of Carbohydrates
Bruice8th EditionOrganic ChemistryISBN: 9780135213711
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TOC.tableOfContents
- Ch. 1 - Remembering General Chemistry: Electronic Structure and Bonding31
- 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
Capitolo 20, Problema 31a
What is the main structural difference between a. amylose and cellulose?
Guida verificata passo dopo passo1
Step 1: Understand the structure of amylose. Amylose is a polysaccharide composed of α-D-glucose units linked by α(1→4) glycosidic bonds, forming a linear chain.
Step 2: Understand the structure of cellulose. Cellulose is also a polysaccharide, but it is composed of β-D-glucose units linked by β(1→4) glycosidic bonds, forming a linear chain. The β-linkages result in a more rigid structure compared to amylose.
Step 3: Compare amylose and cellulose. The main structural difference lies in the type of glycosidic bond: amylose has α(1→4) linkages, while cellulose has β(1→4) linkages. This difference affects their physical properties and biological roles.
Step 4: Understand the structure of amylopectin. Amylopectin is a branched polysaccharide composed of α-D-glucose units. It has α(1→4) glycosidic bonds in the linear portions and α(1→6) glycosidic bonds at the branch points.
Step 5: Compare amylose and amylopectin. The main structural difference is that amylose is linear, while amylopectin is branched due to the presence of α(1→6) linkages at the branch points.
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Polysaccharide Structure
Polysaccharides are large carbohydrate molecules composed of long chains of monosaccharide units. The structural differences among polysaccharides like amylose, cellulose, and amylopectin arise from the types of glycosidic bonds and the branching of the chains. Understanding these structures is crucial for distinguishing their functions and properties in biological systems.
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11:53
Polysaccharide
Glycosidic Bonds
Glycosidic bonds are covalent linkages formed between monosaccharides through a dehydration reaction. In amylose, the glucose units are connected by α(1→4) glycosidic bonds, resulting in a linear structure. In contrast, cellulose consists of β(1→4) glycosidic bonds, leading to a rigid, linear arrangement that contributes to its structural role in plant cell walls.
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06:00Single bonds, double bonds, and triple bonds.
Branching in Polysaccharides
Branching refers to the presence of side chains in polysaccharide structures. Amylopectin, a component of starch, has both α(1→4) and α(1→6) glycosidic bonds, creating a highly branched structure that allows for rapid energy release. In contrast, amylose is predominantly unbranched, affecting its solubility and digestibility compared to amylopectin.
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11:53Polysaccharide
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