The given carbohydrates are to be classified for the given conditions. Concept introduction: A five membered closed chain form of a monosaccharide is furanose while a six membered closed chain form of a monosaccharide is pyranose. For a sugar drawn in the Fischer projection, if the hydroxyl group on the bottom chiral center points to the right, it is referred as D-sugar. If the hydroxyl group on the bottom chiral center point to the left, it is referred as L-sugar. Carbohydrates that have a carbon substituent attached to the main chain are branched chain sugars. Carbohydrates having a keto functional group in their open-chair form are called ketoses. In deoxy sugars, the hydroxyl group is replaced by hydrogen. In cyclic form of sugar the carbon atom, that is, the carbonyl carbon in the open chain form is the anomeric carbon. The configuration at the anomeric carbon atom in maltose is variable and may be either α or β . In two stereoisomeric chair forms of a carbohydrate, one form has anomeric hydroxyl group in equatorial orientation (above the plane), called beta form, and the other has hydroxyl group in the axial position (below the plane), called an alpha form.

Question

Want to see the full answer?

Answer 1

Question

Chapter 24, Problem 30P

Interpretation Introduction

Interpretation:

The given carbohydrates are to be classified for the given conditions.

Concept introduction:

A five membered closed chain form of a monosaccharide is furanose while a six membered closed chain form of a monosaccharide is pyranose.

For a sugar drawn in the Fischer projection, if the hydroxyl group on the bottom chiral center points to the right, it is referred as D-sugar. If the hydroxyl group on the bottom chiral center point to the left, it is referred as L-sugar.

Carbohydrates that have a carbon substituent attached to the main chain are branched chain sugars.

Carbohydrates having a keto functional group in their open-chair form are called ketoses.

In deoxy sugars, the hydroxyl group is replaced by hydrogen.

In cyclic form of sugar the carbon atom, that is, the carbonyl carbon in the open chain form is the anomeric carbon.

The configuration at the anomeric carbon atom in maltose is variable and may be either α or β.

In two stereoisomeric chair forms of a carbohydrate, one form has anomeric hydroxyl group in equatorial orientation (above the plane), called beta form, and the other has hydroxyl group in the axial position (below the plane), called an alpha form.

Expert Solution & Answer

Want to see the full answer?

Check out a sample textbook solution

See solution

Students have asked these similar questions

(a 4 shows scanning electron microscope (SEM) images of extruded actions of packing bed for two capillary columns of different diameters, al 750 (bottom image) and b) 30-μm-i.d. Both columns are packed with the same stationary phase, spherical particles with 1-um diameter. A) When the columns were prepared, the figure shows that the column with the larger diameter has more packing irregularities. Explain this observation. B) Predict what affect this should have on band broadening and discuss your prediction using the van Deemter terms. C) Does this figure support your explanations in application question 33? Explain why or why not and make any changes in your answers in light of this figure. Figure 4 SEM images of sections of packed columns for a) 750 and b) 30-um-i.d. capillary columns.³

fcrip = ↓ bandwidth Il temp 32. What impact (increase, decrease, or no change) does each of the following conditions have on the individual components of the van Deemter equation and consequently, band broadening? Increase temperature Longer column Using a gas mobile phase instead of liquid Smaller particle stationary phase Multiple Paths Diffusion Mass Transfer

34. Figure 3 shows Van Deemter plots for a solute molecule using different column inner diameters (i.d.). A) Predict whether decreasing the column inner diameters increase or decrease bandwidth. B) Predict which van Deemter equation coefficient (A, B, or C) has the greatest effect on increasing or decreasing bandwidth as a function of i.d. and justify your answer. Figure 3 Van Deemter plots for hydroquinone using different column inner diameters (i.d. in μm). The data was obtained from liquid chromatography experiments using fused-silica capillary columns packed with 1.0-μm particles. 35 20 H(um) 큰 20 15 90 0+ 1500 100 75 550 01 02 594 05 μ(cm/sec) 30 15 10