The structure of the given compound (E)-Hydrazone of Benzaldehyde has to be drawn. Concept introduction: Imines can exists as stereoisomers. The isomers are named using the E, Z system of nomenclature. The lone pair has the low priority. If the two high priority groups are on the same side of the double bond, then it is known as Z-isomer. If the two high priority groups are on the opposite side of the double bond then it is known as E-isomer.

Question

(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

Answer 1

Question

Chapter 16.8, Problem 31P

(a)

Interpretation Introduction

Interpretation:

The structure of the given compound (E)-Hydrazone of Benzaldehyde has to be drawn.

Concept introduction:

Imines can exists as stereoisomers. The isomers are named using the E, Z system of nomenclature. The lone pair has the low priority.

If the two high priority groups are on the same side of the double bond, then it is known as Z-isomer.

If the two high priority groups are on the opposite side of the double bond then it is known as E-isomer.

(b)

Interpretation Introduction

Interpretation:

The structure of the given compound (Z)-oxime of propiophenone has to be drawn.

Concept introduction:

Imines can exist as stereoisomers. The isomers are named using the E, Z system of nomenclature. The lone pair has the low priority.

If the two high priority groups are on the same side of the double bond, then it is known as Z-isomer.

If the two high priority groups are on the opposite side of the double bond then it is known as E-isomer.

Expert Solution & Answer

Trending nowThis is a popular solution!

See solution

Check out sample textbook 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