Point Charge Ligands

In a tetragonal potential vd4 of six point charges qeo with the positions mentioned above, the relative energies of the orbitals dxz and yz ( g)j xy z — ( 1 ) will be 

The term which reuses all energies by the same amount is not con- 00 

To fix all three orbital energy differences, usually two additional tetragonal parameters are defined 59) 

They may be positive or negative, depending on whether the octahedron is elongated or compressed. 

Compounds in square brackets do not form regular octahedra. The experimental and calculated 10 Dq parameters axe based on the four Me—F distances in the x, y plane. 

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To understand the effect of this difference, we need to consider which type of orbital is lower in energy. Because the negative point-charge ligands repel negatively charged electrons, the electrons will prefer the d orbitals farthest from the ligands. In other words, the dxz, dyz, and dxy orbitals (called... 

An octahedral arrangement of point-charge ligands and the orientation of the 3d orbitals. 

If the electrostatic field created by the point charge ligands is octahedral, the energy of the electrons in the 3d orbitals that point directly at the ligands is raised with respect to that in the spherical field, while the energy of the electrons in the orbitals that point between the Ugands is lowered with respect to the spherical field... 

Ligand field theory is an extension of crystal field theory which is freely parameterized rather than taking a localized field arising from point charge ligands. 

If the electrostatic field created by die point charge ligands is spherical. 

If the electrostatic field created by the point charge ligands is spherical, the energies of the electrons in the 3d orbitals are raised uniformly... 

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