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What is the shape of the coordination polyhedron of 2-?

What is the shape of the coordination polyhedron of 2-? Correct Answer PtCl4

The CN of the metal ion is 4 because Cl– is a unidentate ligand. The only possibility for the shape of its coordination polyhedra is square planar or tetrahedral. From crystal field splitting diagram, it is known that 2- is square planar.

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