Summary for d5 complexes with strong and weak field ligands
The d electron configuration for a d5 complex with a weak field ligand is shown below. Note that complexes with strong field ligands have fewer unpaired electrons and are referred to as low spin.
Note that the maximum number of unpaired electrons possible is 5 as is seen in the high spin complex above.
| eg |   | |
| t2g | | |
| weak field ligand high spin d5 complex | ||
| eg | |
| t2g |  |
| strong field ligand low spin d5complex | |
Note that the maximum number of unpaired electrons possible is 5 as is seen in the high spin complex above.