All the constitutional isomers of C 5 H 8 O , that are ketones that do not contain a C=C , are to be drawn. Concept introduction: Constitutional isomers have the same molecular formula. They differ in the connectivity of the atoms. They do not interconvert and can be separated from each other. When drawing the constitutional isomers for a given molecular formula, the first step is to determine the IHD. This allows to find out the possible number of double bonds, triple bonds, or rings in each isomer. Then all possible isomers are drawn, omitting double bonds, triple bonds, and halogen atoms. Finally, double and triple bonds are added at various locations to generate as many structures as possible.

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

Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 4, Problem 4.65P

Interpretation Introduction

Interpretation:

All the constitutional isomers of C5H8O, that are ketones that do not contain a C=C, are to be drawn.

Concept introduction:

Constitutional isomers have the same molecular formula. They differ in the connectivity of the atoms. They do not interconvert and can be separated from each other. When drawing the constitutional isomers for a given molecular formula, the first step is to determine the IHD. This allows to find out the possible number of double bonds, triple bonds, or rings in each isomer. Then all possible isomers are drawn, omitting double bonds, triple bonds, and halogen atoms. Finally, double and triple bonds are added at various locations to generate as many structures as possible.

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(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

Answer 2

Question

Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 4, Problem 4.65P

Interpretation Introduction

Interpretation:

All the constitutional isomers of C5H8O, that are ketones that do not contain a C=C, are to be drawn.

Concept introduction:

Constitutional isomers have the same molecular formula. They differ in the connectivity of the atoms. They do not interconvert and can be separated from each other. When drawing the constitutional isomers for a given molecular formula, the first step is to determine the IHD. This allows to find out the possible number of double bonds, triple bonds, or rings in each isomer. Then all possible isomers are drawn, omitting double bonds, triple bonds, and halogen atoms. Finally, double and triple bonds are added at various locations to generate as many structures as possible.

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Answer 3

Question

Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 4, Problem 4.65P

Interpretation Introduction

Interpretation:

All the constitutional isomers of C5H8O, that are ketones that do not contain a C=C, are to be drawn.

Concept introduction:

Constitutional isomers have the same molecular formula. They differ in the connectivity of the atoms. They do not interconvert and can be separated from each other. When drawing the constitutional isomers for a given molecular formula, the first step is to determine the IHD. This allows to find out the possible number of double bonds, triple bonds, or rings in each isomer. Then all possible isomers are drawn, omitting double bonds, triple bonds, and halogen atoms. Finally, double and triple bonds are added at various locations to generate as many structures as possible.

Expert Solution & Answer

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Check out sample textbook solution

Answer 4

Question

Definition Definition Class of organic compounds that contain a carboxyl group ( - COOH ) and has a general formula R - COOH or R - CO 2 H , where R refers to the alkyl, alkenyl, aryl, or other groups. They can undergo different chemical reactions, such as acid-base reactions, esterification, and oxidation. These are essential components of living organisms, playing important roles in metabolic processes, signaling, and as pharmaceuticals.

Chapter 4, Problem 4.65P

Interpretation Introduction