Chemistry: A Molecular Approach (3rd Edition)

Published by Prentice Hall
ISBN 10: 0321809246
ISBN 13: 978-0-32180-924-7

Chapter 24 - Sections 24.1-24.6 - Exercises - Review Questions - Page 1125: 14


Few unpaired electrons (Pairing energy is lower than splitting energy) - low spin More unpaired electrons(Pairing energy is higher than splitting energy) - high

Work Step by Step

A complex can be classified as high spin or low spin. When talking about all the molecular geometries, we compare the crystal field splitting energy ( Δ ) and the pairing energy ( P ). Normally, these two quantities determine whether a certain field is low spin or high spin.The electrons will take the path of least resistance--the path that requires the least amount of energy. If the paring energy is greater than Δ , then electrons will move to a higher energy orbital because it takes less energy. If the pairing energy is less than Δ , then the electrons will pair up rather than moving singly to a higher energy orbital.
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