relationship between D, L sugar

[cherr1pop]

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Are they enantiomeric to each other? diastereomeric? epimeric!??!! help!!
(i'm talking about like D and L for the same sugar.. like relationsip between D and L of glucose or ribose, etc.)

 

[Optimism Smiles]

Are they enantiomeric to each other? diastereomeric? epimeric!??!! help!!
(i'm talking about like D and L for the same sugar.. like relationsip between D and L of glucose or ribose, etc.)

Something is an anomer when it differs in configuration at c-1 in the ring form of the sugar (the carbon next to the O of the ring). If it is above the plane of the ring, it is the beta anomer. If it is below the plane of the ring, it is the alpha anomer. They are also epimers (structures that differ only at ONE carbon's configuration). Anomers are just a special type of epimer found in sugars.

L and D glucose are stereoisomers of each other. D-Glucose, D-galactose, and D-mannose are diastereomers of each other. Hope I didn't confuse you more.

 

[cherr1pop]

one more question... are D and L glucose enantiomeric or diastereomeric to each other? cause 'stereoisomer' includes both terms.. right?

 

[water88]

They are enantiomeric. All stereocenters reversed.

 

[cherr1pop]

I think I get it now.. Thank you so much Optimism Smiles & water88 😍