Explanation Maltose is a disaccharide of two α -D-glucose units joined together by glycosidic linkage. The structural representation of sugar molecule in cyclic form is known as Haworth projection. The Haworth projection of maltose is shown below. Figure 1 Hemiacetals contains one alkoxy group and one hydroxyl group attached to same carbon atom while acetals contain two alkoxy groups on a single carbon atom. The C a is acetal carbon because it is attached to two alkoxy groups. The C b is hemiacetal carbon because it is attached to one alkoxy group and one hemiacetal group

Chemistry for Today: General, Organic, and Biochemistry

9th Edition

ISBN: 9781305960060

Author: Spencer L. Seager, Michael R. Slabaugh, Maren S. Hansen

Publisher: Cengage Learning

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Concept explainers

Carbohydrates

Carbohydrates are the organic compounds that are obtained in foods and living matters in the shape of sugars, cellulose, and starch. The general formula of carbohydrates is Cn(H2O)2. The ratio of H and O present in carbohydrates is identical to water.

Starch

Starch is a polysaccharide carbohydrate that belongs to the category of polysaccharide carbohydrates.

Mutarotation

The rotation of a particular structure of the chiral compound because of the epimerization is called mutarotation. It is the repercussion of the ring chain tautomerism. In terms of glucose, this can be defined as the modification in the equilibrium of th…

L Sugar

A chemical compound that is represented with a molecular formula C6H12O6 is called L-(-) sugar. At the carbon’s 5th position, the hydroxyl group is placed to the compound’s left and therefore the sugar is represented as L(-)-sugar. It is capable of rotat…

Question

Definition Definition Organic compounds that have a carbonyl group, C=O, as their functional group. The carbonyl group in aldehydes is placed at the end of the molecular structure, which means the C=O is attached to one hydrogen atom and an alkyl group or a benzene ring. Just like all the other homologous series in organic chemistry, the naming of aldehydes uses the suffix “-al”. The general molecular formula is C n H 2n O.

Chapter 17, Problem 17.49E

Interpretation Introduction

Interpretation:

The Haworth projection formula of the disaccharides maltose and sucrose is to be drawn. The hemiacetal, hemiketal, acetal or ketal carbons are to be labeled.

Concept introduction:

Monosaccharides are the small units of simple sugars. Polysaccharides are made up of small units of monosaccharides. The carbohydrates with free aldehyde or ketone groups can act as reducing sugars. Under basic conditions, weak oxidizing agents such as Tollen’s reagent and Benedict’s solution oxidize the aldehyde or ketone group of the monosaccharide.

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Chapter 17 Solutions

Chemistry for Today: General, Organic, and Biochemistry

Ch. 17 - Prob. 17.1E Ch. 17 - Describe whether each of the following substances...Ch. 17 - Prob. 17.3E Ch. 17 - Prob. 17.4E Ch. 17 - Prob. 17.5E Ch. 17 - Why are carbon atoms 1 and 3 of glyceraldehyde not...Ch. 17 - Prob. 17.7E Ch. 17 - Which of the following molecules can have...Ch. 17 - Which of the following molecules can have...Ch. 17 - Prob. 17.10E

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