How to find out whether complex is tetrahedral or square planar?
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First of all, if your complex metal ion is not in group 8 (Ni, Pd, Pt) or it doesn't have a d8 configuration (like Rh(I) or Au(III)), it is usually tetrahedral (Assuming you already know that the coordination number is 4).
If your metal ion is in group 8 or has a d8 configuration, look at the crystal field splitting diagram. Square planar complexes have a four tiered diagram (i.e. four different sets of orbitals with different energies).
If your metal ion is in group 8 or has a d8 configuration, look at the crystal field splitting diagram. Square planar complexes have a four tiered diagram (i.e. four different sets of orbitals with different energies).
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