Question

Explain the convention for using α and β to designate the configurations of the cyclic forms of monosaccharides

Answer 1

Answer:

Monosaccharides that contain five or more carbons atoms form cyclic structures in aqueous solution. Two cyclic stereoisomers can form from each straight-chain monosaccharide; these are known as anomers.

Answer 2

Answer:

The configuration of a cyclic sugar known as $\alpha$(Alpha) occurs when the substituent on the other carbon surrounding the ring oxygen is on the opposite face of the ring from the oxygen on the anomeric carbon. Compared to beta ($\beta$), which is the situation where the two substituents are on the same ring faces.

Explanation:

The carbonyl oxygen atom can be pushed up or down when a straight-chain monosaccharide develops a cyclic structure, resulting in two stereoisomers.

The structure with the first carbon atom's OH group projected downward is known as the alpha ($\alpha$) form. The beta ($\beta$) form is shown by the structures on the right side with the first carbon atom's OH group pointing upward.

Anomers are cyclic monosaccharides that have two stereoisomers that differ in structure around the carbon atom that was the carbonyl carbon atom in the straight-chain form.

In an aqueous solution, monosaccharides with five or more carbon atoms create cyclic structures. Each straight-chain monosaccharide can produce two cyclic stereoisomers, or anomers. Mutarotation is the mechanism by which the two anomers of a monosaccharide and its straight-chain structure combine in an equilibrium state in an aqueous solution.

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