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Question:

Predict the number of unpaired electrons in the square planar [Pt(CN)4]2- ion.

Answer:

[Pt(CN)4]2-

In this complex, Pt is in the +2 state. It forms a square planar structure. This means that it undergoes dsp2 hybridization. Now, the electronic configuration of Pd(+2) is 5d8.

CN - being a strong field ligand causes the pairing of unpaired electrons. Hence, there are no unpaired electrons in [Pt(CN)4]2-


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