Explain the structure of zeise's salt?

Zeise's Salt
Formula: K[PtCl3(C2H4)].H2O
K+ ion and water molecule are present outside the coordination sphere. Both, the Cl- ion and ethylene are coordinated with Platinum ion, hence inside the coordination sphere.

The explanation of structure is given by Dewar-Chatt-Duncanson model
The pi-acid alkene donates electron density into a metal d-orbital from π-symmetry bonding orbital between the carbon atoms.
The metal (platinum) donates electrons back from (a different) filled d-orbital into the empty π* antibonding orbital.

The explanation of structure in detail is in graduate level syllabus. Hence not explained in detail here.

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