The two most common forms of glucose, -D-glucopyranose and -D-glucopyranose, can be brought into equilibrium by dissolving
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The two most common forms of glucose, α-D-glucopyranose and β-D-glucopyranose, can be brought into equilibrium by dissolving them in water with a trace of an acid or base catalyst.
The specific rotation of the equilibrium mixture is 152.7 deg mL g–1 dm–1. The specific rotation of pure a-d-glucopyranose is 1112 degrees mL g–1 dm–1, and that of pure b-d-glucopyranose is 118.7 degrees mL g–1 dm–1.
What is the percentage of each form in the equilibrium mixture?
Transcribed Image Text:
a-D-glucopyranose H₂O* or "OH B-D-glucopyranose
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