Organic Chemistry (9th Edition)
Organic Chemistry (9th Edition)
9th Edition
ISBN: 9780321971371
Author: Leroy G. Wade, Jan W. Simek
Publisher: PEARSON
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Chapter 3.8B, Problem 3.13P

Draw a graph similar to Figure 3-11, of the torsional energy of 2-methylbutane as it rotates about the C2—C3 bond.

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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

Chapter 3 Solutions

Organic Chemistry (9th Edition)

Ch. 3.7B - Prob. 3.11PCh. 3.7C - Draw a graph similar to Figure 3-9, of the...Ch. 3.8B - Draw a graph similar to Figure 3-11, of the...Ch. 3.9 - Draw a perspective representation of the most...Ch. 3.10C - Give IUPAC names for the following compounds.Ch. 3.10C - Draw the structure and give the molecular formula...Ch. 3.11 - Which of the following cycloalkanes are capable of...Ch. 3.11 - Give IUPAC names for the following cycloalkanes.Ch. 3.12B - The heat of combustion of...Ch. 3.12C - Prob. 3.20PCh. 3.13B - The cyclohexane chair shown in Figure 3-22 has the...Ch. 3.13B - Draw 1,2,3,4,5,6-hexamethylcyclohexane with all...Ch. 3.14 - Prob. 3.23PCh. 3.14 - Prob. 3.24PCh. 3.14 - Draw the most stable conformation of a....Ch. 3.15 - Prob. 3.26PCh. 3.15 - a. Draw both chair conformations of cis-1...Ch. 3.15 - Prob. 3.28PCh. 3.15A - Draw the two chair conformations of each of the...Ch. 3.15B - Draw the most stable conformation of a....Ch. 3.16A - Name the following compounds.Ch. 3.16B - Prob. 3.32PCh. 3 - Prob. 3.33SPCh. 3 - Prob. 3.34SPCh. 3 - 3-35 a. Draw and name the five cycloalkane...Ch. 3 - Draw the structure that corresponds with each...Ch. 3 - Each of the following descriptions applies to more...Ch. 3 - Write structures for a homologous series of...Ch. 3 - Prob. 3.39SPCh. 3 - Construct a graph, similar to Figure 3-11, of the...Ch. 3 - The following names are all incorrect or...Ch. 3 - In each pair of compounds, which compound has the...Ch. 3 - There are eight different five-carbon alkyl...Ch. 3 - Use a Newman projection about the indicated bond...Ch. 3 - a. Draw the two chair conformations of...Ch. 3 - Draw the two chair conformations of each compound,...Ch. 3 - Using what you know about the conformational...Ch. 3 - Prob. 3.48SPCh. 3 - Draw Newman projections along the C3C4 bond to...Ch. 3 - Prob. 3.50SPCh. 3 - The most stable form of the common sugar glucose...Ch. 3 - This is a Newman projection of a substituted...
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Types of bonds; Author: Edspira;https://www.youtube.com/watch?v=Jj0V01Arebk;License: Standard YouTube License, CC-BY