Concept explainers
a.
To determine:
Whether the given carbohydrate (a.) is the alpha or beta anomer.
Introduction:
Diastereomers are those stereoisomers who differ in orientation of two chiral centers due to which the isomers are not the mirror images of each other. The cyclic forms of diastereoisomeric sugars which differ at the anomeric carbon (carbonyl carbon which reacts to form hemiacetal) are known as anomers. Hemiacetal is formed when the carbonyl carbon (partially positive) and oxygen of hydroxyl group (partially negative) forms a bond. The hemiacetal anomers exist in alpha and beta forms based on the site of substituent at anomeric carbon.
b.
To determine:
Whether the given carbohydrate (b.) is the alpha or beta anomer.
Introduction:
Diastereomers are those stereoisomers who differ in orientation of two chiral centers due to which the isomers are not the mirror images of each other. The cyclic forms of diastereoisomeric sugars which differ at the anomeric carbon (carbonyl carbon which reacts to form hemiacetal) are known as anomers. Hemiacetal is formed when the carbonyl carbon (partially positive) and oxygen of hydroxyl group (partially negative) forms a bond. The hemiacetal anomers exist in alpha and beta forms based on the site of substituent at anomeric carbon.
Want to see the full answer?
Check out a sample textbook solutionChapter 6 Solutions
Mastering Chemistry with Pearson eText -- Standalone Access Card -- for General, Organic, and Biological Chemistry (3rd Edition)
- General, Organic, and Biological ChemistryChemistryISBN:9781285853918Author:H. Stephen StokerPublisher:Cengage LearningOrganic And Biological ChemistryChemistryISBN:9781305081079Author:STOKER, H. Stephen (howard Stephen)Publisher:Cengage Learning,