Domanda del libro di testo
Draw the enantiomer of the following monosaccharides, and in each pair identify the D sugar and the L sugar.
a.
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Ch.20 Carbohydrates
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187
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TOC.tableOfContents
- Ch.1 Matter and Measurements27
- Ch.2 Atoms and the Periodic Table20
- Ch.3 Ionic Compounds8
- Ch.4 Molecular Compounds23
- Ch.5 Classification & Balancing of Chemical Reactions12
- Ch.6 Chemical Reactions: Mole and Mass Relationships28
- Ch.7 Chemical Reactions: Energy, Rate and Equilibrium64
- Ch.8 Gases, Liquids and Solids24
- Ch.9 Solutions52
- Ch.10 Acids and Bases25
- Ch.11 Nuclear Chemistry22
- Ch.12 Introduction to Organic Chemistry: Alkanes57
- Ch.13 Alkenes, Alkynes, and Aromatic Compounds47
- Ch.14 Some Compounds with Oxygen, Sulfur, or a Halogen50
- Ch.15 Aldehydes and Ketones45
- Ch.16 Amines42
- Ch.17 Carboxylic Acids and Their Derivatives57
- Ch.18 Amino Acids and Proteins82
- Ch.19 Enzymes and Vitamins63
- Ch.20 Carbohydrates44
- Ch.21 The Generation of Biochemical Energy65
- Ch.22 Carbohydrate Metabolism45
- Ch.23 Lipids42
- Ch.24 Lipid Metabolism33
- Ch.25 Protein and Amino Acid Metabolism24
- Ch.26 Nucleic Acids and Protein Synthesis45
McMurry8th EditionFundamentals of General, Organic, and Biological ChemistryISBN: 9780134015187Non è quello che usi tu?Cambia libro di testo
Capitolo 20, Problema 2b
Draw the structures of a ketohexose.
Guida verificata passo dopo passo1
Understand the terms: An aldopentose is a monosaccharide with five carbon atoms (pentose) and an aldehyde functional group (-CHO). A ketohexose is a monosaccharide with six carbon atoms (hexose) and a ketone functional group (C=O).
For the aldopentose, start by drawing a chain of five carbon atoms. Place the aldehyde group (-CHO) at the first carbon (C1) and hydroxyl groups (-OH) on the remaining carbons, ensuring the correct stereochemistry for a specific aldopentose (e.g., D-ribose or D-arabinose).
For the ketohexose, draw a chain of six carbon atoms. Place the ketone group (C=O) at the second carbon (C2) and hydroxyl groups (-OH) on the remaining carbons, ensuring the correct stereochemistry for a specific ketohexose (e.g., D-fructose).
Label the carbons in both structures sequentially, starting from the carbon with the functional group (aldehyde or ketone). This helps in identifying the positions of the functional groups and hydroxyl groups.
Verify the structures by checking that the aldopentose has five carbons with an aldehyde group and the ketohexose has six carbons with a ketone group. Ensure the stereochemistry matches the specific sugar you are drawing.
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Aldopentose
An aldopentose is a five-carbon sugar (pentose) that contains an aldehyde group (-CHO) at one end. This structure is characterized by the presence of four hydroxyl groups (-OH) attached to the carbon atoms, which can exist in linear and cyclic forms. Common examples include ribose and arabinose, which play crucial roles in biological processes such as RNA structure.
Ketohexose
A ketohexose is a six-carbon sugar (hexose) that features a ketone group (C=O) typically located at the second carbon atom. This structure includes five hydroxyl groups and can also exist in both linear and cyclic forms. Fructose is a well-known example of a ketohexose, and it is significant in metabolism and energy production.
Structural Representation
Structural representation refers to the way chemical compounds are depicted, illustrating the arrangement of atoms and the bonds between them. For carbohydrates like aldopentoses and ketohexoses, this can include Fischer projections for linear forms and Haworth projections for cyclic forms. Understanding these representations is essential for visualizing molecular interactions and reactivity.
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Molecular Representations Concept 1
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Domanda del libro di testo
Draw the enantiomer of the following monosaccharides, and in each pair identify the D sugar and the L sugar.
b.
592
views
Domanda del libro di testo
Aldoheptoses have five chiral carbon atoms. What is the maximum possible number of aldoheptose stereoisomers? Draw all of the aldoheptose stereoisomers.
590
views
Domanda del libro di testo
Draw the structures of an aldopentose.
1159
views