Organic Chemistry (8th Edition)

Published by Pearson
ISBN 10: 0321768418
ISBN 13: 978-0-32176-841-4

Chapter 1 - Introduction and Review - Problems: Problem 1-6 g

Answer

Sodium has a positive charge. Boron has a negative charge because it forms 4 bonds instead of 3.
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Work Step by Step

Formal Charge (FC) = [number of valence electrons] - [number of non-bonding electrons] - 1/2 [shared electrons] FC (Sodium) = 1-0-0 = +1 FC (boron) = 3-0-4 = -1
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