Crystal Field Treatment of Octahedral Compounds

This page presents exercises in Crystal Field Theory diagrams for transition metal complexes. When the "New Question" button is pressed a description of the complex will be provided with sufficient information for you to distribute the electrons in the boxes provided. How the information is entered is critica on this drilll.

Since we are only interested in complexes where there are two ways to distribute the electrons, the number of cases shown on this page is limited to d⁴ to d⁷.
Getting the correct electron count on the metal ion is critical
Enter the metal electrons from the left to the right at each level. If an orbital has a single electron, enter a "1", if it has two electrons, enter a "2".
Have all the filled orbitals on the left (before the half-filled orbitals). In principle, "221" is the same as "212", but use the format "221" for this drill.

Example: a d⁷ ion is high spin. This means that all five orbitals will be filled as if there were of the same energy, resulting in the following:

d_z², d_x²-_y² 1 1

d_xy, d_xz, d_yz 2 2 1



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