The total number of isomers for a square planar complex: is:

Question

The total number of isomers for a square planar complex:  is:

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Strategy:
 Multiply the number of spatial geometric isomers by the permutations afforded by linkage isomerism of the ambidentate ligands.

Step 1: Geometrical Isomers
The complex  is a square planar  complex.
A square planar complex with four different monodentate ligands inherently forms 3 geometrical isomers.

Step 2: Linkage Isomers
There are two ambidentate ligands:
-  can bind via N or O. (2 states).
-  can bind via S or N. (2 states).
Total independent linkage combinations per geometric la

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