The IUPAC name of the complex `[Pt(NH_3)_2Cl_2]` is

Options

A. (a) platinum (II) diammino dichloride
B. (b) diammine dichlorido platinum (II)
C. (c) bis (ammino) dichloro platinum (IV)
D. (d) dichloro diammine platinum (II)

Explanation

To determine the IUPAC name of the complex `[Pt(NH_3)_2Cl_2]`, we will follow these steps:

### Step 1: Identify the ligands
The complex contains two types of ligands:
- Amine (NH₃)
- Chloride (Cl⁻)

### Step 2: Name the ligands
According to IUPAC nomenclature:
- The amine ligand is named as "ammine".
- The chloride ligand is named as "chlorido".

### Step 3: Determine the number of each ligand
- There are 2 ammine ligands, so we use the prefix "di" (for two).
- There are 2 chlorido ligands, so we also use the prefix "di".

### Step 4: Write the ligand names in alphabetical order
When naming the ligands, we arrange them in alphabetical order, ignoring the prefixes:
- "ammine" comes before "chlorido".

Thus, we write:
- diammine (for 2 ammine ligands)
- dichlorido (for 2 chlorido ligands)

### Step 5: Identify the metal and its oxidation state
The metal in the complex is platinum (Pt). To determine its oxidation state:
- Each chloride ion contributes -1 charge, and there are 2 chlorides, contributing a total of -2.
- The complex is neutral, so the total charge must equal 0. Therefore, the oxidation state of platinum must be +2 to balance the -2 from the chlorides.

### Step 6: Combine the names and oxidation state
Now we combine the names of the ligands and the metal with its oxidation state:
- The full name will be: "diammine dichloridoplatinum(II)".

### Final Answer
The IUPAC name of the complex `[Pt(NH₃)₂Cl₂]` is **diammine dichloridoplatinum(II)**.

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