The IUPAC name for `[PtCl(NH_(2)CH_(3))(NH_(3))_(2)]Cl` is:

Options

A. diamminechloro(methylamine)platinum(II)chloride
B. (dimethylamine)chlorodiamminoplatinum(II)chloride
C. bis(ammine)chloro(methylamine)platinate(II)chloride
D. diaminechloro(methylamine)platinum(II)chloride

Answer

To determine the IUPAC name for the coordination compound \([PtCl(NH_2CH_3)(NH_3)_2]Cl\), we will follow a systematic approach. Here’s a step-by-step breakdown:

### Step 1: Identify the Central Metal Atom
The central metal atom in the coordination compound is platinum (Pt).

### Step 2: Identify the Ligands
The ligands attached to the platinum are:
- Chloride ion (Cl⁻)
- Methylamine (NH₂CH₃)
- Two ammonia (NH₃) molecules

### Step 3: Name the Ligands
- The chloride ligand is named "chloro."
- Methylamine is named "methylamine."
- Ammonia is named "ammine."

### Step 4: Determine the Number of Each Ligand
- There is one chloride ligand (chloro).
- There are two ammonia ligands (ammine).
- There is one methylamine ligand (methylamine).

### Step 5: Write the Ligands in Alphabetical Order
When naming the ligands, we arrange them in alphabetical order regardless of their prefixes:
1. Amine (ammine)
2. Chloro
3. Methylamine

### Step 6: Determine the Oxidation State of the Metal
Let the oxidation state of platinum be \(x\). The charges from the ligands are:
- Chloride (Cl) contributes -1
- Methylamine (NH₂CH₃) is neutral (0)
- Ammonia (NH₃) is neutral (0)

The overall charge of the coordination complex is +1 (due to the external chloride ion). Therefore, we can set up the equation:
\[ x + (-1) + 0 + 0 = +1 \]
Solving for \(x\):
\[ x - 1 = 1 \]
\[ x = 2 \]

Thus, the oxidation state of platinum is +2.

### Step 7: Combine the Names
Now, we can combine the names of the ligands with the name of the metal and its oxidation state:
- Ligands: "diammine" (for two NH₃), "chloro," "methylamine"
- Metal: "platinum"
- Oxidation state: (II)

### Step 8: Write the Full Name
Putting it all together, we get:
**IUPAC Name: diamminechloro(methylamine)platinum(II) chloride**

### Final Answer
The IUPAC name for \([PtCl(NH_2CH_3)(NH_3)_2]Cl\) is:
**diamminechloro(methylamine)platinum(II) chloride**

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