Correct IUPAC name of ` [ Pt ( N H _ 3 ) _ 2 ) Cl ( CH _ 3 NH _ 2 ) ]Cl ` is :

Options

A. Bisammine (methanamine ) chlorido platinum ( II) chloride
B. Diamminechlorido(methanamine) platinum (II) chlordie
C. Diammine (methanamine ) chlorido platinum ( II) chloride
D. Diamminechlorido ( aminomethane ) platinum ( II) chloride

Answer

To determine the correct IUPAC name of the complex \([Pt(NH_3)_2Cl(CH_3NH_2)]Cl\), we will follow the steps outlined in the IUPAC nomenclature rules for coordination compounds.

### Step-by-Step Solution:

1. **Identify the Metal Center**:
- The metal in the complex is platinum (Pt).

2. **Identify the Ligands**:
- The complex contains:
- Two ammonia ligands (NH₃), which are neutral.
- One chloride ligand (Cl⁻), which is negatively charged.
- One methanamine ligand (CH₃NH₂), which is also neutral.

3. **Name the Ligands**:
- Ammonia (NH₃) is named as "ammine".
- Chloride (Cl⁻) is named as "chlorido".
- Methanamine (CH₃NH₂) is named as "methanamine".

4. **Count the Number of Each Ligand**:
- There are 2 ammine ligands, so we use the prefix "di" to indicate this.
- There is 1 chlorido ligand.
- There is 1 methanamine ligand.

5. **Arrange Ligands Alphabetically**:
- According to IUPAC rules, ligands are named in alphabetical order regardless of their prefixes.
- The order will be:
- "ammine" (from NH₃)
- "chlorido" (from Cl⁻)
- "methanamine" (from CH₃NH₂)

6. **Combine the Ligand Names**:
- The combined name for the ligands will be: "diammine", "chlorido", and "methanamine".

7. **Determine the Oxidation State of the Metal**:
- Let the oxidation state of platinum be \(x\).
- The overall charge of the complex is neutral, so we set up the equation:
\[ x + 2(0) + (-1) + 0 = 0 \]
\[ x - 1 = 0 \implies x = +1 \]
- Thus, the oxidation state of platinum is +2.

8. **Name the Metal**:
- Since the oxidation state is +2, we write "platinum(II)".

9. **Combine All Parts**:
- The full name of the complex is:
\[ \text{diammine chlorido methanamine platinum(II) chloride} \]

### Final IUPAC Name:
The correct IUPAC name of the complex \([Pt(NH_3)_2Cl(CH_3NH_2)]Cl\) is:
**diammine chlorido methanamine platinum(II) chloride**.