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 19: 1.64

Answer

The carbon with a negative formal charge will have 1 lone pair of electrons.
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Work Step by Step

Normally, a negative carbon will have 2 free electrons, and it will make 3 bonds (Since it has 5 (4+1) electrons in the valence shell). The octet rule states that a carbon can't have more than 4 bonds. For this reason, a carbon with a negative formal charge can't have 5 bonds and no free electrons.
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