Multiple Choice
Which sugar is an enantiomer of sugar A? How many stereoisomers does sugar A have?
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9. Carbohydrates
Stereochemistry of Monosaccharides
Multiple Choice
Two sugars which differ from one another only in configuration of one of many chiral carbon atoms are termed:
A
Epimers.
B
Enantiomers.
C
Optical isomers.
D
Stereoisomers.
E
Conformers.
F
None of these are correct.
Verified step by step guidance1
Understand the definition of epimers: Epimers are sugars that differ in configuration at only one specific chiral carbon atom, while the rest of the molecule remains identical.
Review the concept of chiral carbon atoms: A chiral carbon is a carbon atom that has four different groups attached to it, leading to non-superimposable mirror images.
Differentiate between epimers and other isomers: Enantiomers are mirror images of each other, optical isomers refer to molecules that differ in the way they rotate plane-polarized light, and stereoisomers include all isomers that have the same molecular formula but differ in spatial arrangement.
Consider the specific question: The problem asks for sugars differing at only one chiral center, which aligns with the definition of epimers.
Conclude that the correct term for sugars differing at one chiral carbon is 'Epimers', as it matches the definition provided in the problem.
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