CH1012
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9
CRYSTAL FIELD THEORY II
• As the ligands approach the metal
centre:
If the direction in which the occupied metal orbitals point is directly at the electron-rich ligand then the electron energies increase because of repulsions.
If the direction in which the occupied metal orbitals point is directly at the electron-rich ligand then the electron energies increase because of repulsions.
• In an octahedral complex, this will occur for the dz2 and dx2-y2 orbitals.
• There will therefore be a splitting of the 5 orbitals into 2
sets:
1) dz2 and dx2-y2 and 2) dxy, dxz, and dyz,
eg set t2g set
1) dz2 and dx2-y2 and 2) dxy, dxz, and dyz,
eg set t2g set
