Question

What is the IUPAC name of $K_2\left[PtC{l}_6\right]$?

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

Answer 1

Answer: (C)

Potassium hexa chloro platinate (IV)

First, we note that the name of the counter ion is potassium. Now, we write the name of the complex ion. It contains platinum(IV), so it will be called as platinate(IV). We can determine the oxidation number of platinum by charge balance. Also, it contains 6 $C{l}^{-}$ groups so it will be hexa chloro. Combining, we get that the name of the negative ion is hexachloroplatinate(IV). So, the name of the compound becomes potassium hexachloroplatinate(IV).