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Working on a practice question for finals so I really want to understand how this works:

What is the coordination number of mercury in K2[HgI4]?

I say that mercury's coordination number is 4 because I^- is a monodentate ligand.

Does the potassium affect the coordination number at all? Thanks for any insight.

  • Chemistry -

    You are right. K has no effect on the coordination number; it simply is the other half of the "ionic" bond between K^+ and HgI4^2-

  • Chemistry -

    Thanks so much :)

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