0
Epimers are those carbons that have "H" and "OH" are present and they can change their position
Enantiomers are special type of isomer these are mirror image to each other
Wiki User
∙ 12y ago
Add your answer:
Earn +20 pts
Are D-glucose and D- mannose enantiomers?
No. Epimers are sugars that differ in the configuration around one carbon atom. D-Mannose and D-Galactose differ in two carbons (C-2 and C-4). yes. D-glucose and D-mannose are epimers (difference at C-2), D-glucose and D-galactose are epimers (difference at C-4), but D-mannose and D-galactose are not epimer(difference at C-2 and C-4).
Why are enantiomers of biological interest?
Mainly because enantiomers have identical physical and chemical properties. However, the difference between two enantiomers can have tremendous impact, especially in biological systems, because many important biological molecules are chiral.
What are epimers?
Epimers are refer to one of two optical isomers that differ from each other only in the configuration about one asymmetric carbon atom (that is, the epimeric carbon).
Can glycerol form any enantiomers?
Yes, it can. There are two glycerol enantiomers, depending on the position of OH group on the second carbon atom.
What is the difference between enantiomers and diastereomer?
There can be several structural formulas for a single molecular formula. These are known as isomers. Isomers can be defined as "different compounds that have the same molecular formula." There are mainly two types of isomers called constitutional isomers and stereoisomers. For example, C4H10 can have following constitutional isomers.Constitutional isomers are "isomers that differ because their atoms are connected in a different order." Stereoisomers are isomers that differ from the spatial arrangement of the atoms. Diastereomers and enantiomers are the two types of stereoisomers.DiastereomersDiastereomers are stereoisomers whose molecules are not mirror images of each other. For example, cis and trans isomers are Diastereomers.In the above two compounds, the connectivity of atoms is same. Both compounds have a carbon- carbon double bond. And for each carbon, a chlorine atom and a hydrogen atom is connected. Cis and trans molecules differ only from the way atoms are arranged in the space. That is, in cis isomer, both hydrogens are on the same side of the carbon double bond. But in the trans isomer, hydrogen atoms are on either side of the carbon double bond. And the two structures are not mirror images of each other. Therefore, they are Diastereomers. However, cis and trans molecules are not the only kind of diastereomers we can find.EnantiomersEnantiomers are "stereoisomers whose molecules are nonsuperposable mirror images of each other. " Enantiomers are only possible with molecules, which are chiral. Chiral molecule is the one that is not identical with its mirror image. For a molecule to be chiral, it should have one tetrahedral atom with four different groups attached to it. This carbon atom is known as a stereocenter. Chiral molecules make mirror images that are not superposable. So the molecule and the mirror image are said to be enantiomers. Following is an example of a compound that forms enantiomers.The enantiomers are named using the R and S system. So, according to the system the molecule on the right hand side is (S)-2-butanol, and the other one is (R)-2-butanol. Enantiomers don't have different boiling points, melting points, solubilities, different infrared spectra etc. All these chemical and physical properties of enantiomers are similar because intermolecular forces are similar in both isomers. They become separate only by their different behaviors towards the plane polarized light. That is, enantiomers rotate the plane of the plane polarized light in opposite directions. However, they rotate the light in equal amounts. Because of their effect on the polarized light, enantiomers are said to be optically active. The equimolar mixture of two enantiomers is called a racemic mixture. Racemic mixture doesn't show any rotation of the polarized light, therefore it is optically inactive.
Are D-glucose and D- mannose enantiomers?
No. Epimers are sugars that differ in the configuration around one carbon atom. D-Mannose and D-Galactose differ in two carbons (C-2 and C-4). yes. D-glucose and D-mannose are epimers (difference at C-2), D-glucose and D-galactose are epimers (difference at C-4), but D-mannose and D-galactose are not epimer(difference at C-2 and C-4).
Why are enantiomers of biological interest?
Mainly because enantiomers have identical physical and chemical properties. However, the difference between two enantiomers can have tremendous impact, especially in biological systems, because many important biological molecules are chiral.
Are Anomers and Epimers same?
Yes, anomers and epimers are the same. In chemistry, anomers are special types of epimers.
Why all anomers are epimers but all epimers are not anomers?
Epimers are two diastereomers that differ at one stereogenic center (a chiral carbon). An anomer is is an epimer that is created after cyclization.-that is the new sterogenic center is created by a cyclization reaction.Added:This above might be true, but is an answer to the OTHER question:'Why all anomers are epimers but notall epimers are anomers'in stead of the original question:'Why all anomers are epimers but allepimers are not anomers'This origional is not fully logic when the ambiguous word 'all' is wrongly interpreted.
What are epimers?
Epimers are refer to one of two optical isomers that differ from each other only in the configuration about one asymmetric carbon atom (that is, the epimeric carbon).
Can glycerol form any enantiomers?
Yes, it can. There are two glycerol enantiomers, depending on the position of OH group on the second carbon atom.
What is the difference between racemic mixture and mesocompounds?
1:1 molar solution of two enantiomers is recemic mixture and it may be resolved into two parts by chemical means while mesoform is a pure substance and can not be resolved, but both these are optically inactive.
How many enantiomers are possible for the aldoheptoses?
Aldoheptoses have seven carbon atoms and one chiral center, so they can have a maximum of 2^1 = 2 enantiomers.
What are Anomers and Epimers?
it is a stereoisomer that differs in configuration at only one chiral centerIs_glucose_and_galactose_are_epimersIs_glucose_and_galactose_are_epimers
What isomers that are mirror images of each other?
Chiral molecules have mirror-image isomers
What is the term used for a pair of positive and negative isomers?
enantiomers
Chemical compound which are isomers and have same physical and chemical properties?
Enantiomers..
