Electronic and Geometric Structures of Metals in Biological Systems

6 ELECTRONIC AND GEOMETRIC STRUCTURES OF METALS IN BIOLOGICAL SYSTEMS 

Note that there are a number of different methods for indicating the oxidation state of a metal ion, especially transition metal ions that have variable oxidation states. As an example, the iron ion in its +2 oxidation state may be written as Fe +, Fe(II), Fe , or iron(ll). In this text, the methods are used interchangeably. 

Ligand field strength may determine coordination geometry. For example, NiCll occurs as a tetrahedral complex (small splitting—small At ), whereas 

The sum of the d electron contributions to LFSE can be calculated with the formula shown in equation 1.26 for octahedral complexes. 

TABLE 1.10 Splitting Values for d Orbitals in Common Geometries 

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Electronic and Geometric Structures of Metals in Biological Systems, 11... 

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