IUPAC name of `H_(2)[PtCl_(6)]` is

Options

A. Hydrogen hexachloroplatinate (IV)
B. dihydrogen hexachloroplatinate (IV)
C. hydrogen hexachloroplatinic (IV) acid
D. hexachloroplatinic (IV) acid

Explanation

To determine the IUPAC name of the coordination compound \( H_2[PtCl_6] \), we can follow these steps:

### Step 1: Identify the Components of the Compound
The compound \( H_2[PtCl_6] \) consists of:
- A central metal ion, which is platinum (Pt).
- Six chloride ions (Cl) acting as ligands.
- Two hydrogen ions (H).

### Step 2: Determine the Oxidation State of Platinum
To find the oxidation state of platinum in this complex, we can set up the following equation based on the overall charge of the complex:

Let the oxidation state of platinum be \( x \). The charge contributed by the six chloride ligands is \( 6 \times (-1) = -6 \). Since the entire complex \( [PtCl_6]^{2-} \) has a charge of -2 (due to the presence of two hydrogen ions), we can write the equation:

\[ x + (-6) = -2 \]

Solving for \( x \):

\[ x - 6 = -2 \\ x = 4 \]

Thus, the oxidation state of platinum is +4.

### Step 3: Naming the Ligands
The ligands in the complex are chloride ions, which are named as "chloro" in IUPAC nomenclature. Since there are six chloride ions, we use the prefix "hexa" to indicate the number of ligands.

### Step 4: Naming the Metal
The name of the metal in its +4 oxidation state is modified by adding the suffix "-ic" to the root name of the metal. Therefore, platinum becomes "platinic" when it is in the +4 oxidation state.

### Step 5: Combine the Names
Now, we combine the names of the ligands and the metal along with the oxidation state. The general format for naming coordination compounds is:

\[ \text{(Ligand Name)} + \text{(Metal Name)} + \text{(Oxidation State)} \]

Thus, we have:

- Ligands: hexachloro
- Metal: platinic
- Oxidation state: (IV)

### Step 6: Include the Acidic Nature
Since the compound \( H_2[PtCl_6] \) is an acid, we denote it as "acid" at the end of the name. Therefore, the full IUPAC name becomes:

\[ \text{Hexachloroplatinic acid} \]

### Final Answer
The IUPAC name of \( H_2[PtCl_6] \) is **Hexachloroplatinic acid**.

---