Chemistry · IUPAC nomenclature of mononuclear co-ordination compounds, isomerism

What is the IUPAC name of ? \)

What is the IUPAC name of \( K_{2}\left[P t C l_{6}\right] ? \)

  • A. Potassium hexachloro platinum
  • B. Potassium hexachloro platinum (IV)
  • C. Potassium hexa chloro platinate (IV)
  • D. Dipotassium hexa chloro platinum

Step-by-step solution

The compound K2[PtCl6] consists of K+ cations and [PtCl6]2- anion. In the complex anion, six chloro ligands (Cl-) coordinate to platinum. The oxidation state of platinum is +4 (since each Cl is -1 and the complex has -2 charge). The IUPAC name for the anion is hexachloroplatinate(IV), and the cation is potassium. Hence, the full name is potassium hexachloroplatinate(IV), which matches option C.
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