Electron occupany for octahedral complexes of d4 metals or metal ions

If the ligand is
  • weak, each orbital must be singly occupied before any pairing
  • strong, electrons pair in the t2g before any electrons occupy the eg orbitals

     
    eg             
       
    t2g                
            
    weak field ligand
    high spin d4 complex
  eg       
  t2g                    
        
  strong field ligand
low spin d4complex



 
Dr Sheila Woodgate
© The University of Auckland 2002