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Q. Primary and secondary valency of $Pt$ in $\left[ Pt ( en )_2 Cl _2\right] Cl _2$ are

Coordination Compounds

Solution:

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Two chlorine satisfy (PV)
Two chlorine satisfy (PV) and (SV)
Two en satisfy (SV)
Since,(en) is bidentate,
Thus, P V=4, S V=6
Note C.N. = SV
O.N. = PV