The IUPAC name of the complex ` [P t (Br) (Cl) (NH_(3)) _(3) (NO_(2))]Cl` is

Options

A. Triamminechlorobromonitroplatinum(IV) chloride
B. Triamminebromochloronitroplatinum(IV) chloride
C. Bromochlorotriamminenitroplatinum(IV) chloride
D. Bromochlorotriamminenitroplatinum(II) chloride

Explanation

To determine the IUPAC name of the complex \([Pt(Br)(Cl)(NH_3)_3(NO_2)]Cl\), we will follow the systematic naming conventions for coordination compounds. Here’s a step-by-step breakdown of the process:

### Step 1: Identify the Components of the Complex
The complex consists of a central metal atom (platinum, Pt) and several ligands (Br, Cl, NH3, and NO2). The complex also has a counter ion, which is Cl.

### Step 2: Name the Ligands
- **Br (bromide)**: This is a negative ligand and is named as "bromo".
- **Cl (chloride)**: This is also a negative ligand and is named as "chloro".
- **NH3 (ammonia)**: This is a neutral ligand and is named as "amine". Since there are three NH3 ligands, we use the prefix "tri" to indicate this.
- **NO2 (nitrite)**: This is a negative ligand and is named as "nitro".

### Step 3: Determine the Oxidation State of the Metal
To find the oxidation state of platinum (Pt), we set up the equation based on the charges of the ligands and the overall charge of the complex:
- Let the oxidation state of Pt be \(x\).
- The charges from the ligands are:
- Br: -1
- Cl: -1
- NH3: 0 (neutral)
- NO2: -1

The overall charge of the complex is +1 (since it is a cation). Therefore, we can write the equation:
\[ x - 1 - 1 - 1 = +1 \]
This simplifies to:
\[ x - 3 = +1 \]
Thus, \(x = +4\). Therefore, the oxidation state of platinum is +4.

### Step 4: Assemble the Name of the Complex
Now we will put together the names of the ligands in alphabetical order, followed by the name of the metal with its oxidation state in Roman numerals:
- Ligands in alphabetical order: amine (tri), bromo, chloro, nitro.
- The name of the metal is "platinum" with an oxidation state of IV (4).

Putting this together, we get:
- Triamine (for NH3)
- Bromo (for Br)
- Chloro (for Cl)
- Nitro (for NO2)
- Platinum(IV)

### Step 5: Add the Counter Ion
Finally, we add the name of the counter ion, which is chloride (Cl). Since the complex is cationic, we simply add "chloride" at the end.

### Final IUPAC Name
Thus, the complete IUPAC name of the complex \([Pt(Br)(Cl)(NH_3)_3(NO_2)]Cl\) is:
**Triamine bromo chloro nitro platinum(IV) chloride.**

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