EP ORGANIC CHEMISTRY -MOD.MASTERING 18W
9th Edition
ISBN: 9780136781776
Author: Wade
Publisher: PEARSON CO
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Chapter 20, Problem 20.45SP
(a)
Interpretation Introduction
To determine: The compounds in the stockroom manager’s bottle and the compound in the student’s test tube.
Interpretation: The compounds in the stockroom manager’s bottle and the compound in the student’s test tube are to be identified.
Concept introduction: The substance reacts with infrared radiations to produce infrared spectrum. IR spectroscopy aids in identification of chemicals especially
(b)
Interpretation Introduction
To determine: The discrepancy between the stockroom manager’s bottle and the student’s test tube.
Interpretation: The discrepancy between the stockroom manager’s bottle and the student’s test tube is to be explained.
Concept introduction: The substance reacts with infrared radiations to produce infrared spectrum. IR spectroscopy aids in identification of chemicals especially functional groups of substances. Infrared region has three parts named as near, mid and far infrared. Every functional group gets absorbed at a specific value to give peak.
(c)
Interpretation Introduction
To determine: The suggestion to avoid misunderstanding in the future.
Interpretation: The suggestion to avoid misunderstanding in the future is to be given.
Concept introduction: The substance reacts with infrared radiations to produce infrared spectrum. IR spectroscopy aids in identification of chemicals especially functional groups of substances. Infrared region has three parts named as near, mid and far infrared. Every functional group gets absorbed at a specific value to give peak.
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Students have asked these similar questions
Compound A (CH18O) forms a phenylhydrazone, but it gives a negative Tollens' test. The IR
spectrum of A has a strong band near 1710 cm-1. The broadband carbon NMR spectrum of A is
given below.
a) Propose a structure for A and explain how your structure fits the spectral data.
b) Propose a mechanism for the formation of phenylhydrazone
CH,
A, CyH0
CH,
CH
CDC,
TMS
220
200
180
160
140
120
100
80
60
40
20
8 (ppm)
How can you distinguish aldehydes, ketones, and carboxylic acids from each other using IR spectra? Explain using specific examples.
9) What would be the difference between the 4 alcohols in IR?
They all show O-H, C-H sp3, and C-H aromatic bonds. The only way to tell which one is used would be by comparing the fingerprint regions to published IR spectra of each alcohol.
Alcohol 2 has an aldehyde C-H group that could be seen between 2700-2800 and 2800-2900 cm-1
Only alcohol 3 will show O-H bond around 3300 cm-1
Only alcohol 1 will show C=C aromatic bonds around 1600 cm-1
10) Assuming 5.0 mL of alcohol 2 was used and 2.2 g of the product was isolated, what is the percent yield for this reaction? The product has a molar mass of 198.00 g/mol.
11) How could the percent yield be increased for this reaction?
Add NaOH to neutralize the product as it forms
Add a catalyst such as H2SO4 to help speed up the reaction
Add a catalyst such as HCl to help speed up the reaction
Cool the reaction on ice to increase the rate of reaction
12) Is there another way that the product of this reaction…
Chapter 20 Solutions
EP ORGANIC CHEMISTRY -MOD.MASTERING 18W
Ch. 20.2C - Prob. 20.1PCh. 20.2C - Name the following carboxylic acids (when...Ch. 20.4B - Rank the compounds in each set in order of...Ch. 20.5 - Prob. 20.4PCh. 20.5 - Phenols are less acidic than carboxylic acids,...Ch. 20.5 - Prob. 20.6PCh. 20.7A - Prob. 20.7PCh. 20.7B - Prob. 20.8PCh. 20.7D - Draw all four resonance forms of the fragment at...Ch. 20.7D - a. Why do most long-chain fatty acids show a large...
Ch. 20.10 - Prob. 20.13PCh. 20.10 - A carboxylic acid has two oxygen atoms, each with...Ch. 20.10 - Prob. 20.15PCh. 20.10 - The mechanism of the Fischer esterification was...Ch. 20.10 - Prob. 20.17PCh. 20.12 - Show how to synthesize the following compounds,...Ch. 20.13 - Show how you would synthesize the following...Ch. 20.14 - Prob. 20.20PCh. 20.14 - Prob. 20.21PCh. 20.15 - Propose a mechanism for the reaction of benzoic...Ch. 20.15 - Prob. 20.23PCh. 20.15 - Prob. 20.24PCh. 20 - Prob. 20.25SPCh. 20 - Give both IUPAC names and common names for the...Ch. 20 - Draw the structures of the following compounds. a....Ch. 20 - Prob. 20.28SPCh. 20 - Arrange each group of compounds in order of...Ch. 20 - Predict the products (if any) of the following...Ch. 20 - Rank the following isomers in order of increasing...Ch. 20 - Prob. 20.32SPCh. 20 - What do the following pKa values tell you about...Ch. 20 - Given the structure of ascorbic acid (vitamin C):...Ch. 20 - Prob. 20.35SPCh. 20 - Show how you would accomplish the following...Ch. 20 - Predict the products and propose mechanisms for...Ch. 20 - Prob. 20.38SPCh. 20 - Prob. 20.39SPCh. 20 - Prob. 20.40SPCh. 20 - Prob. 20.44SPCh. 20 - Prob. 20.45SPCh. 20 - Predict the major form of each compound when it is...
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