The IUPAC name of the complex `[Pt(NH_(3))_(2)Cl_(2)Br_(2)]` is

Options

A. Diamminedichlorodibromopalatinate(IV)
B. Diamminedibromodichloroplatinum(IV)
C. Dichlorodiamminedibromopalatinate(II)
D. Diamminedibromodichloroplatinum(II)

Explanation

To determine the IUPAC name of the complex \([Pt(NH_3)_2Cl_2Br_2]\), we will follow these steps:

### Step 1: Identify the central metal atom
The central metal atom in the complex is Platinum (Pt).

**Hint:** Look for the element that is not a ligand; it is usually the metal in the center of the complex.

### Step 2: Identify the ligands and their names
The ligands present in the complex are:
- Ammonia (NH3) - which is named as "ammine"
- Chloride (Cl) - which is named as "chloro"
- Bromide (Br) - which is named as "bromo"

**Hint:** Ligands are usually named based on their chemical structure. Common ligands have specific names that you should memorize.

### Step 3: Determine the number of each type of ligand
In the complex \([Pt(NH_3)_2Cl_2Br_2]\):
- There are 2 ammine ligands.
- There are 2 chloro ligands.
- There are 2 bromo ligands.

**Hint:** Count the number of each ligand carefully as this will affect the prefix used in the name.

### Step 4: Use the appropriate prefixes for the ligands
For the ligands:
- "di-" is used for 2 ligands.
Thus, we will have:
- Diamine for NH3
- Dichloro for Cl
- Dibromo for Br

**Hint:** Prefixes like "di-", "tri-", "tetra-", etc., indicate the number of ligands present.

### Step 5: Determine the oxidation state of the metal
The overall charge of the complex is neutral (0). The oxidation state of platinum can be calculated as follows:
Let the oxidation state of Pt be \(x\).
The charges from the ligands are:
- 2 Cl (each -1) contributes -2
- 2 Br (each -1) contributes -2
- 2 NH3 (neutral) contributes 0

Setting up the equation:
\[ x + (-2) + (-2) = 0 \]
\[ x - 4 = 0 \]
\[ x = +4 \]

So, the oxidation state of platinum is +4.

**Hint:** To find the oxidation state, consider the charges contributed by each ligand and set the sum equal to the overall charge of the complex.

### Step 6: Assemble the name in the correct order
According to IUPAC nomenclature, ligands are named in alphabetical order, regardless of their prefixes. Therefore, we arrange them as:
1. Diamine (ammine)
2. Dibromo
3. Dichloro

Finally, we add the name of the metal with its oxidation state in Roman numerals.

Thus, the full name of the complex is:
**Diamine dibromo dichloro platinum(IV)**

### Final Answer
The IUPAC name of the complex \([Pt(NH_3)_2Cl_2Br_2]\) is **Diamine dibromo dichloro platinum(IV)**.

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