General, Organic, and Biochemistry
9th Edition
ISBN: 9780078021541
Author: Katherine J Denniston, Joseph J Topping, Dr Danae Quirk Dorr
Publisher: McGraw-Hill Education
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Chapter 18, Problem 18.28QP
Interpretation Introduction
Interpretation:
All amino acids are chiral except glycine have to be explained.
Concept Introduction:
The chiral center is that atom that is linked to four different groups. The presence of the chiral center leads to the formation of non-superimposable mirror images. To identify whether a given center is chiral or not one has to check for the presence of four different substituents. The molecule which contains the chiral center is a chiral molecule.
If any of the two substituents happen to be similar, then that center is known as achiral.
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How many signals do you expect in the H NMR spectrum for this molecule?
Br
Br
Write the answer below.
Also, in each of the drawing areas below is a copy of the molecule, with Hs shown. In each copy, one of the H atoms is colored red. Highlight in red all other H
atoms that would contribute to the same signal as the H already highlighted red.
Note for advanced students: In this question, any multiplet is counted as one signal.
Number of signals in the 'H NMR spectrum.
For the molecule in the top drawing area, highlight in red any other H atoms that will contribute to
the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
No additional Hs to color in top
molecule
For the molecule in the bottom drawing area, highlight in red any other H atoms that will
contribute to the same signal as the H atom already highlighted red.
If no other H atoms will contribute, check the box at right.
No additional Hs to color in bottom
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Chapter 18 Solutions
General, Organic, and Biochemistry
Ch. 18.1 - Write the one-letter and three-letter...Ch. 18.1 - Prob. 18.2QCh. 18.2 - Write the structure of each of the following...Ch. 18.2 - Write the structure of each of the following...Ch. 18.2 - Write the structure of each of the following...Ch. 18.6 - Describe the four levels of protein structure.
Ch. 18.6 - Prob. 18.6QCh. 18.8 - Prob. 18.7QCh. 18.8 - Prob. 18.8QCh. 18.10 - Prob. 18.9Q
Ch. 18.10 - How does extremely low pH cause proteins to...Ch. 18.11 - Prob. 18.11QCh. 18.11 - Prob. 18.12QCh. 18 - Prob. 18.13QPCh. 18 - Prob. 18.14QPCh. 18 - Prob. 18.15QPCh. 18 - Prob. 18.16QPCh. 18 - Prob. 18.17QPCh. 18 - Prob. 18.18QPCh. 18 - Prob. 18.19QPCh. 18 - Prob. 18.20QPCh. 18 - Prob. 18.21QPCh. 18 - Prob. 18.22QPCh. 18 - Describe the basic general structure of an...Ch. 18 - Prob. 18.24QPCh. 18 - Prob. 18.25QPCh. 18 - Prob. 18.26QPCh. 18 - Prob. 18.27QPCh. 18 - Prob. 18.28QPCh. 18 - Prob. 18.29QPCh. 18 - Prob. 18.30QPCh. 18 - Prob. 18.31QPCh. 18 - Prob. 18.33QPCh. 18 - Prob. 18.63QPCh. 18 - Prob. 18.64QPCh. 18 - Prob. 18.65QPCh. 18 - Prob. 18.66QPCh. 18 - Prob. 18.67QPCh. 18 - Prob. 18.68QPCh. 18 - Prob. 18.69QPCh. 18 - Prob. 18.70QPCh. 18 - Prob. 18.71QPCh. 18 - Prob. 18.72QPCh. 18 - Prob. 18.73QPCh. 18 - Prob. 18.74QPCh. 18 - Carbon monoxide binds tightly to the heme groups...Ch. 18 - Prob. 18.76QPCh. 18 - Prob. 18.77QPCh. 18 - Prob. 18.78QPCh. 18 - Prob. 18.79QPCh. 18 - Prob. 18.80QPCh. 18 - Prob. 18.81QPCh. 18 - Prob. 18.82QPCh. 18 - Prob. 18.85QPCh. 18 - Prob. 18.86QPCh. 18 - Prob. 18.87QPCh. 18 - Prob. 18.88QPCh. 18 - Prob. 18.89QPCh. 18 - Prob. 18.90QPCh. 18 - Prob. 18.91QPCh. 18 - Prob. 18.92QPCh. 18 - Prob. 18.93QPCh. 18 - Prob. 18.94QPCh. 18 - Prob. 18.95QPCh. 18 - Prob. 18.96QPCh. 18 - Why is it necessary to mix vegetable proteins to...Ch. 18 - Prob. 18.98QPCh. 18 - Prob. 18.99QPCh. 18 - Prob. 18.100QPCh. 18 - Calculate the length of an α-helical polypeptide...Ch. 18 - Proteins involved in transport of molecules or...Ch. 18 - The α-keratin of hair is rich in the amino acid...Ch. 18 - Calculate the number of different pentapeptides...
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