Experimental Organic Chemistry: A Miniscale & Microscale Approach (Cengage Learning Laboratory Series for Organic Chemistry)
6th Edition
ISBN: 9781305080461
Author: John C. Gilbert, Stephen F. Martin
Publisher: Brooks Cole
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Chapter 9.3, Problem 14E
(a)
Interpretation Introduction
Interpretation:In the 1H NMR spectra, the various resonance to the hydrogen nuclei responsible for them is to be assigned.
Concept Introduction : Nuclear Magnetic Resonance (NMR) spectroscopy is a logical chemistry method used in quality control.
It studies for defining the material and purity of a sample and their molecular structure. It explains magnetic energy levels undergoing the resonance transition when the atomic nuclei are exposed to an external magnetic field and an
(b)
Interpretation Introduction
Interpretation:In the 13C NMR spectra of these compounds, the various resonances to the carbon nuclei responsible for them are to be assigned.
Concept Introduction : Nuclear Magnetic Resonance (NMR) spectroscopy is a logical chemistry method used in quality control.
It studies for defining the material and purity of a sample and their molecular structure. It explains magnetic energy levels undergoing the resonance transition when the atomic nuclei are exposed to an external magnetic field and an electromagnetic radiation is applied with the specific frequency. The NMR spectrum is obtained by detecting the absorption signals.
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4. The success of each reaction in a Radical Fluorination of an Ibuprofen Derivative is
determined by calculating an NMR yield. To do this, one will add 1 equivalent (0.15 mmol)
of an internal standard, dibromomethane (CH2B12), to each reaction mixture when one
prepare the NMR samples. Look up the molecular weight of dibromoethane and
calculate how many mg of dibromomethane one will need to add to each reaction. (Convert
0.15 mmol of dibromometbane to mg.)
Consider the nitration by electrophilic aromatic substitution of salicylamide to iodosalicylamide.
O.
NH2
NH2
Nal, NaOCI
LOH
EEOH
The density of salicylamide, d = 1.09 g/mL.
A reaction was performed in which 3.90 mL of salicylamide was reacted with a mixture of concentrated nitric and
sulfuric acids to make 5.56 g of iodosalicylamide. Calculate the theoretical yield and percent yield for this reaction.
Theoretical yield
g
Percent yield
%
Write contributing resonance structures to show how the negative charge in the intermediate in the preceding reaction is shared by three ring atoms and the nitrogen of the cyano group. Here is one of the contributing structures to get you started.
Chapter 9 Solutions
Experimental Organic Chemistry: A Miniscale & Microscale Approach (Cengage Learning Laboratory Series for Organic Chemistry)
Ch. 9.2 - Prob. 1ECh. 9.2 - Prob. 2ECh. 9.2 - Prob. 3ECh. 9.2 - Prob. 4ECh. 9.2 - Prob. 5ECh. 9.2 - Prob. 6ECh. 9.2 - Prob. 7ECh. 9.2 - Prob. 8ECh. 9.2 - Prob. 9ECh. 9.2 - Prob. 10E
Ch. 9.2 - Prob. 11ECh. 9.2 - Prob. 12ECh. 9.2 - Prob. 13ECh. 9.2 - Prob. 14ECh. 9.2 - Prob. 15ECh. 9.2 - Prob. 16ECh. 9.2 - Prob. 17ECh. 9.2 - Prob. 18ECh. 9.2 - Prob. 19ECh. 9.2 - Prob. 20ECh. 9.2 - Prob. 21ECh. 9.2 - Prob. 22ECh. 9.2 - Prob. 23ECh. 9.2 - Prob. 24ECh. 9.3 - Prob. 1ECh. 9.3 - Prob. 2ECh. 9.3 - Prob. 3ECh. 9.3 - Prob. 4ECh. 9.3 - Prob. 5ECh. 9.3 - Prob. 6ECh. 9.3 - Prob. 7ECh. 9.3 - Prob. 8ECh. 9.3 - Prob. 9ECh. 9.3 - Prob. 10ECh. 9.3 - Prob. 11ECh. 9.3 - Prob. 12ECh. 9.3 - Prob. 13ECh. 9.3 - Prob. 14E
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