Solid CrF contains a Cr(III) ion surrounded by six F- ions in an octahedral geometry, all at distances of 190 pm. However, MnF3 is in a distorted geometry, with Mn–F distances of 179, 191, and 209 pm (two of each). Explain.

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter20: Chemistry Of Selected Transition Elements And Coordination Compounds
Section: Chapter Questions
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Solid CrF contains a Cr(III) ion surrounded by six F-
ions in an octahedral geometry, all at distances of 190 pm. However, MnF3 is in a distorted geometry, with Mn–F distances of 179, 191, and 209 pm (two of each). Explain.

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