IUPAC name of `[Pt(NH_(3))_(2)Cl(NO_(2))]` is

Options

A. Platinum diaminechloronitrite
B. Chloronitrito-N-ammineplatinum (II)
C. Diamminechloridonitrito-N-platinum (II)
D. Diamminechloronitrito-N-platinate (II)

Explanation

To determine the IUPAC name of the coordination compound \([Pt(NH_3)_2Cl(NO_2)]\), we can follow these steps:

### Step 1: Identify the ligands
The ligands in the complex are:
- \(NH_3\) (ammine)
- \(Cl^-\) (chlorido)
- \(NO_2^-\) (nitrito)

### Step 2: Determine the oxidation state of the central metal
Let the oxidation state of platinum (Pt) be \(x\).
- The oxidation state of \(NH_3\) is 0 (since it is a neutral ligand).
- The oxidation state of \(Cl\) is -1.
- The oxidation state of \(NO_2\) is -1.

The overall charge of the complex is 0. Therefore, we can set up the equation:

\[ x + 2(0) + (-1) + (-1) = 0 \]

This simplifies to:

\[ x - 2 = 0 \]

Thus, \(x = +2\). The oxidation state of platinum is +2.

### Step 3: Name the ligands in alphabetical order
When naming the ligands, we list them in alphabetical order regardless of their charge:
1. Chlorido (from Cl)
2. Nitrito (from NO2)
3. Ammine (from NH3)

### Step 4: Use the appropriate prefixes for the ligands
- There are 2 ammine ligands, so we use the prefix "di".
- There is 1 chlorido ligand, so we use "mono" (though "mono" is often omitted).
- There is 1 nitrito ligand, so we use "mono" (also often omitted).

### Step 5: Combine the names and include the oxidation state of the metal
Putting it all together, we have:
- Ligands: diammine, chlorido, nitrito
- Central metal: platinum
- Oxidation state: II (indicated as "platinum(II)")

### Final IUPAC Name
The IUPAC name of the compound \([Pt(NH_3)_2Cl(NO_2)]\) is:
**diammine chlorido nitrito platinum(II)**

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