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CBSE Class 12 · 2011 · Delhi · BiomoleculesShort Answer

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What is essentially the difference between the α-form and β-form of glucose? Explain.

Solution

The cyclisation of glucose creates a new stereocentre at C-1. The two forms differ \textit{only} there: in \textbf{α-D-glucose} the C-1 hydroxyl points opposite to the CHOH side (rotation +112°); in \textbf{β-D-glucose} it points the same side (+19°). Such C-1 isomers are called \textbf{anomers}, interconverting in solution (mutarotation).

CBSE Class 12 Board · 2011 · Delhi · Subjective

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