Introduction to General, Organic and Biochemistry
11th Edition
ISBN: 9781285869759
Author: Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar Torres
Publisher: Cengage Learning
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Chapter 19, Problem 19.31P
Interpretation Introduction
Interpretation:
Find out the process by which sunscreen protects the skin from UV radiation from reaching the skin.
Concept introduction:
Ultraviolet radiation penetrating earth’s ozone layer is randomly divided by wavelength into two regions UV-B and UV-A. Sunscreen agents are more effective in screening UV-B radiation but they don’t screen UV-A radiation.
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When an unknown amine reacts with an unknown acid chloride, an amide with a molecular mass of 163 g/mol (M* = 163 m/z)
is formed. In the infrared spectrum, important absorptions appear at 1661, 750 and 690 cm. The 13C NMR and DEPT spectra
are provided. Draw the structure of the product as the resonance contributor lacking any formal charges.
13C NMR
DEPT 90
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160
120
80
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160
120
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DEPT 135
T
200
160
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Draw the unknown amide.
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Dow
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Chapter 19 Solutions
Introduction to General, Organic and Biochemistry
Ch. 19.1 - Prob. 19.1PCh. 19.4 - Problem 19-2 Complete the equation for each...Ch. 19.4 - Prob. 19.3PCh. 19 - Prob. 19.4PCh. 19 - Write the IUPAC name for each compound.Ch. 19 - Prob. 19.6PCh. 19 - Prob. 19.7PCh. 19 - Prob. 19.8PCh. 19 - Prob. 19.9PCh. 19 - 0 Complete the equations for these reactions.
Ch. 19 - Prob. 19.11PCh. 19 - Prob. 19.12PCh. 19 - Prob. 19.13PCh. 19 - Prob. 19.14PCh. 19 - Prob. 19.15PCh. 19 - 6 Why are Dacron and Mylar referred to as...Ch. 19 - 7 What type of structural feature do the...Ch. 19 - Prob. 19.18PCh. 19 - Prob. 19.19PCh. 19 - 0 Show how triphosphoric acid can form from three...Ch. 19 - 1 Write an equation for the hydrolysis of...Ch. 19 - 2 (Chemical Connections 19A) Locate the ester...Ch. 19 - Prob. 19.23PCh. 19 - Prob. 19.24PCh. 19 - Prob. 19.25PCh. 19 - Prob. 19.26PCh. 19 - Prob. 19.27PCh. 19 - 8 (Chemical Connections 19C) Once it has been...Ch. 19 - Prob. 19.29PCh. 19 - Prob. 19.30PCh. 19 - Prob. 19.31PCh. 19 - Prob. 19.32PCh. 19 - Prob. 19.33PCh. 19 - 4 (Chemical Connections 19F) Why do Lactomer...Ch. 19 - Prob. 19.35PCh. 19 - Prob. 19.36PCh. 19 - Prob. 19.37PCh. 19 - 8 In Chapter 22, we will discuss a class of...Ch. 19 - Prob. 19.39PCh. 19 - Prob. 19.40PCh. 19 - Prob. 19.41PCh. 19 - Prob. 19.42PCh. 19 - Prob. 19.43PCh. 19 - Prob. 19.44PCh. 19 - Prob. 19.45PCh. 19 - Prob. 19.46PCh. 19 - Prob. 19.47PCh. 19 - Prob. 19.48PCh. 19 - Prob. 19.49P
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