Organic Chemistry As a Second Language, 3e: First Semester Topics

Published by John Wiley & Sons
ISBN 10: 111801040X
ISBN 13: 978-1-11801-040-2

Chapter 1 - Bond-Line Drawings - 1.6 Finding Lone Pairs That Are Not Drawn - Problems - Page 17: 1.52

Answer

The first oxygen will have 2 lone pairs, and the second will have 3.
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Work Step by Step

For the Oxygen 1: 1. Find the amount of electrons that the atom has: An oxygen with a neutral formal charge has 6 electrons on the valence shell. 2. Calculate the difference between this number and the number of bonds. 6 electrons - 2 bonds = 4 free electrons 4 free electrons = 2 lone pairs For the Oxygen 2: 1. Find the amount of electrons that the atom has: An oxygen with a negative formal charge has 7 electrons on the valence shell. 2. Calculate the difference between this number and the number of bonds. 7 electrons - 1 bonds = 6 free electrons 6 free electrons = 3 lone pairs
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