
Organic Chemistry (9th Edition)
9th Edition
ISBN: 9780321971371
Author: Leroy G. Wade, Jan W. Simek
Publisher: PEARSON
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Chapter 9, Problem 9.31SP
Interpretation Introduction
Interpretation: The synthesis of ethchlorvynol from acetylene and a carbonyl compound is to be stated.
Concept introduction: The synthesis of compound relies upon the type of reactants and reagents that are used during the reactions, if the acetylene is starting material, then the mechanism proceeds through the abstraction of hydrogen from acetylene due to acidic nature of terminal hydrogen.
The reagents perform numerous functions in reactions like proton abstraction, oxidation, reduction, catalysis, and dehydrogenation.
Ethchlorvynol is a drug prepared from acetylene and carbonyl compound to treat insomnia.
To determine: The synthesis of ethchlorvynol from acetylene and a carbonyl compound.
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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
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1500
100
75
550
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02
594
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Chapter 9 Solutions
Organic Chemistry (9th Edition)
Ch. 9.1 - a. Count the elements of unsaturation in...Ch. 9.2 - Prob. 9.2PCh. 9.4B - What reaction would acetylene likely undergo if it...Ch. 9.6 - Prob. 9.4PCh. 9.6 - Predict the products of the following acid-base...Ch. 9.7A - Solved Problem9-1 showed the synthesis of...Ch. 9.7A - Show how you might synthesize the following...Ch. 9.7B - Prob. 9.8PCh. 9.7B - Show how you would synthesize...Ch. 9.8 - When 2,2-dibromo-1-phenylpropane is heated...
Ch. 9.8 - When 2,2-dibromo-1-phenylpropane is heated...Ch. 9.9C - Show how you would convert a. oct-3-yne to...Ch. 9.9C - The fragrance of (Z)-1-phenylhex-2-en-1-ol...Ch. 9.9D - In the addition of just 1 mole of bromine to 1...Ch. 9.9E - Propose a mechanism for the entire reaction of...Ch. 9.9E - Predict the major product(s) of the following...Ch. 9.9E - Propose a mechanism for the reaction of pent-1-yne...Ch. 9.9E - Show how hex-1-yne might be converted to a....Ch. 9.9F - When pent-2-yne reacts with mercuric sulfate in...Ch. 9.9F - Prob. 9.20PCh. 9.9F - Prob. 9.21PCh. 9.9F - Prob. 9.22PCh. 9.10A - Predict the product(s) you would expect from...Ch. 9.10B - Prob. 9.24PCh. 9.10B - Prob. 9.25PCh. 9 - Prob. 9.26SPCh. 9 - Give common names for the following compounds. a....Ch. 9 - Prob. 9.28SPCh. 9 - Prob. 9.29SPCh. 9 - Using cyclooctyne as your starting material, show...Ch. 9 - Prob. 9.31SPCh. 9 - Prob. 9.32SPCh. 9 - Predict the products of reaction of pent-1-yne...Ch. 9 - Show how you would accomplish the following...Ch. 9 - Show how you would synthesize the following...Ch. 9 - Predict the products formed when CH3CH2C C : Na+...Ch. 9 - Prob. 9.37SPCh. 9 - Prob. 9.38SPCh. 9 - When compound Z is treated with ozone, followed by...Ch. 9 - Show how you would convert the following starting...Ch. 9 - The following functional-group interchange is a...Ch. 9 - Using any necessary inorganic reagents, show how...Ch. 9 - Prob. 9.43SP
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