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Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

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BuyFindarrow_forward

Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

Draw the structural formula for two glucose molecules joined by a β-1,4 linkage.

Interpretation Introduction

Interpretation:

The structural formula for two glucose molecules joined by a β-1,4 linkage has to be drawn.

Concept introduction: Carbohydrates are defined as the polyhydroxy aldehyde or ketone or any compound that can be hydrolyzed to them. Glucose is an example of monosaccharide (Carbohydrates) and has a molecular formula C6H12O6. Glucose can exist in open structure as well as a ring structure. It is used as energy resource in most of the organisms.

Glucose exists in two forms α-D-glucose and β-D-glucose. β-D-glucose is more stable than α-D-glucose this is because naturally, occurring glucose exists in β-D-glucose form.

Explanation

Two glucose units join together to form a disaccharide. A disaccharide is a sugar which is composed of two sugar unit formed by the condensation reaction of the hydroxyl group on one sugar molecule with a hydroxyl group on other sugar molecule and which upon hydrolysis give two monosaccharide units.

The hydroxyl group present on carbon-1 of one β-D-glucose unit react with the hydroxyl group present on carbon-4 of another β-D-glucose unit via condensation reaction and release water molecule. The bridge bond formed by joining the two glucose units is called glycosidic linkage.

Therefore the structural formula for two glucose molecules joined by a β-1,4 linkage is,

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