The two pyranose forms of D-talose formed when it is dissolved in water should be drawn. Concept introduction: The –OH group of compound attacks the carbonyl group of the same compound, thereby a ring is formed by the carbon atoms and oxygen atom of –OH group with incorporating into the ring. Haworth projection is used to represent sugars in their cyclic forms. In Haworth projection, α-indicates the –OH group of anomeric carbon C1 and -CH 2 OH substituent on the C5 carbon is trans to each other. D indicates the -CH 2 OH substituent on the C5 carbon is on up position. The right side and left side –OH groups of chiral carbons in fisher projection are drawn as down side and upward side respectively. Mutarotation is the change of specific rotation of an anomer when dissolved in water. It is due to the equilibrium formation of two anomeric forms and open chain form.

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Chapter 24.5, Problem 15ATS

Interpretation Introduction

Interpretation:

The two pyranose forms of D-talose formed when it is dissolved in water should be drawn.

Concept introduction:

The –OH group of compound attacks the carbonyl group of the same compound, thereby a ring is formed by the carbon atoms and oxygen atom of –OH group with incorporating into the ring.

Haworth projection is used to represent sugars in their cyclic forms.

In Haworth projection,

α-indicates the –OH group of anomeric carbon C1 and -CH2OH substituent on the C5 carbon is trans to each other.

D indicates the -CH2OH substituent on the C5 carbon is on up position.

The right side and left side –OH groups of chiral carbons in fisher projection are drawn as down side and upward side respectively.

Mutarotation is the change of specific rotation of an anomer when dissolved in water. It is due to the equilibrium formation of two anomeric forms and open chain form.

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