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CH1012
CRYSTAL FIELD THEORY III
• The value of D will also determine the occupancy of the t2g and eg orbitals.
• The number of unpaired electrons may vary depending on which electronic arrangement is the most stable. 
• The magnetic properties are therefore also affected by D which is determined by the nature of the ligands.
• Ligands may be classed as weak-field or
strong-field ligands depending on the size
of their effect on D.