The electronic configuration of d5 strong field octahedral complexes can be determined by looking at the spectroscopic data and finding the energy of the lowest occupied molecular orbital (the HOMO).

The electronic configuration of d5 strong field octahedral complexes can be determined by looking at the spectroscopic data and finding the energy of the lowest occupied molecular orbital (the HOMO).

The electronic configuration of d5 strong field octahedral complexes can be determined by looking at the spectroscopic data and finding the energy of the lowest occupied molecular orbital (the HOMO).

This can be done using a variety of techniques, but one simple approach is to plot out an electron configuration diagram for each complex. Once you have these diagrams, look for any orbitals that are filled with electrons (red dots) or empty (black dots). Then count how many electrons are in each orbital: if there are more than four, then that orbital has been completely filled; if there are less than four and more than two, then it is partially filled; otherwise it’s empty. In addition to this rule-of-thumb approach, there are other ways such as quantum mechanical calculations based on molecular orbitals which give us more accurate results but take longer time periods due to their complexity levels being higher than those found within simple spectroscopy studies like absorption ones mentioned above.”

D5 strong field octahedral complexes are electron deficient because they have five ligands and six d-orbitals.

D5 strong field octahedral complexes are electron deficient because they have five ligands and six d-orbitals. The d5 configuration can be considered analogous to a tetrahedral or trigonal bipyramidal configuration; however, the d orbitals are occupied and thus cannot be used to form bonds with additional ligands.

The lowest occupied molecular orbital (HOMO) is the orbital with the highest symmetry, which contains the most electrons.

• The lowest occupied molecular orbital (HOMO) is the orbital with the highest symmetry, which contains the most electrons.
• A symmetric orbital has all its lobes pointing in the same direction and has no nodes or node pairs.

Electron deficient complexes have more electrons in their highest occupied molecular orbital (HOMO) than their lowest unoccupied molecular orbital (LUMO).

Electron deficient complexes have more electrons in their highest occupied molecular orbital (HOMO) than their lowest unoccupied molecular orbital (LUMO).

The HOMO is the orbital with the highest symmetry, and it’s filled first. The LUMO is filled last, after all of the other orbitals are full and stable.

The d5 strong field octahedral complex has a d4 configuration because two bonds are double bonds and two are single bonds.

The d5 strong field octahedral complex has a d4 configuration because two bonds are double bonds and two are single bonds. The d5 octahedral complex is electron deficient because it has an unpaired electron in its HOMO.

Takeaway:

In this lesson, you learned how to determine the electronic configuration of a d5 strong field octahedral complex by looking at the spectroscopic data and finding the energy of the lowest occupied molecular orbital (the HOMO).

The d5 strong field octahedral complex has a d4 configuration because two bonds are double bonds and two are single bonds.