EPIMERS AND ANOMERS PDF

Epimer is a stereoisomer that differs in configuration at only one stereogenic center. An anomer is a cyclic saccharide and also an epimer that differs in the configuration, specifically at the hemiacetal or acetal carbon. This carbon is called the anomeric carbon. However, anomers are a special class of epimers.

Author:Arataxe Moogutaur
Country:Mayotte
Language:English (Spanish)
Genre:Software
Published (Last):25 May 2009
Pages:12
PDF File Size:5.66 Mb
ePub File Size:1.12 Mb
ISBN:723-3-45780-634-3
Downloads:98256
Price:Free* [*Free Regsitration Required]
Uploader:JoJot



Epimer is a stereoisomer that differs in configuration at only one stereogenic center. An anomer is a cyclic saccharide and also an epimer that differs in the configuration, specifically at the hemiacetal or acetal carbon. This carbon is called the anomeric carbon. However, anomers are a special class of epimers.

This is the key difference between anomers and epimers. What are Anomers? This carbon is called the anomeric carbon and it is derived from the carbonyl carbon aldehyde or ketone functional group of the open-chain form of the carbohydrate molecule. Anomerization is the process of conversion of one anomer to the other. What are Epimers? Epimers are found in carbohydrate stereochemistry. They are a pair of stereoisomers which differ only in the configuration at one stereogenic center.

All the other stero-centers in these molecules are similar to each other. Some epimers are very useful in various industrial applications such as in producing drugs. Since epimers contain more than one chiral center, they are diastereomers.

Out of all those chiral centers, they differ from each other in the absolute configuration at only one chiral center. What is the difference between Anomers and Epimers? Definition Anomers: Anomers are a special set of epimers that differ in configuration only at the anomeric carbon. This happens when a molecule such as glucose converts into a cyclic form. Epimers: Epimers are a pair of stereoisomers found in stereochemistry.

They are two isomers which differ in configuration at only one chiral center. If the molecule contains any other stereocenters, they are all same in both isomers.

800T FX6D4 PDF

Difference Between Enantiomers and Epimers

Anomeric carbon is the carbon atom that has an aldehyde or a ketone group in the acyclic form of a sugar molecule. Sugar molecules are composed of an aldehyde or ketone group at one end and an alcohol group at the other end of the acyclic form of the sugar molecule. In order to become more stable, these groups of the two ends can react with each other forming a cyclic sugar molecule. In this cyclic form, the anomeric carbon has a —OH group attached to it. The position of this —OH group in one anomeric molecule is in the opposite direction to that of the other molecule.

AQEEDAH TAHAWIYYAH ARABIC PDF

Difference Between Anomers and Epimers

Monosaccharide like glucose, fructose, mannose and galactose can show different isomerism. For example glucose and fructose are functional isomers of each other as glucose contains aldehyde group and fructose contains ketonic group in molecule. They can also show stereoisomerism due to the presence of chiral carbon atoms. Those stereoisomers which are differing in configuration at only one chiral carbon atom are referred to as Epimers whereas those that differ in configuration at the hemiacetal carbon are referred to as anomers. Anomers Anomers are stereoisomers of cyclic forms of sugars or similar molecules that differ in configuration only at the hemiacetal or hemiketal carbon.

Related Articles