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Electronegative ligands backbond better?
Initially it seems obvious that this would occur however:
Back bonding takes place into the pi* of a X-Y type Ligand (eg NO+, CO, RNC).
For a stronger bonf the MO is lower energy and so antibonding is high in energy.
If this is the case the metal centre is donating into a HIGHER pi* for more electronegative ligands.
However:
The antibonding orbital will be polarised towards the less electronegative part of X-Y (eg N in NO+)
Any ideas?
