how one can find hybridisation of complexes having strong field & weak field ligand both

Dear student,

There are two types of ligands namely strong field and weak field ligands. A strong field ligand is capable of forcing the electrons of the metal atom/ion to pair up (if required). Pairing is done only to the extent which is required to cause the hybridization possible for that co-ordination number. A weak field ligand is incapable of making the electrons of the metal atom/ ion to pair up.

Strong field ligands: CN^–, CO, en, NH₃, H₂O, NO^–, Py.

Weak field ligands: I^–, Br^–, Cl^–, F^–, NO₃^–, OH^–, C₂O₄^2–, NH₃, H₂O.

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