The IUPAC name of `[Co(NH_(3))_(4)Cl(NO_(2))]Cl` is

Options

A. tetraaminechloridonitrito-N-cobalt(III) chloride
B. tetraminechloridonitrioicobalt(II) chloride
C. tetraaminechloridonitriocobalt(I) chloride
D. tetraaaminechloridonitrocobalt(III) chloride

Explanation

To determine the IUPAC name of the coordination compound \([Co(NH_3)_4Cl(NO_2)]Cl\), we can follow these steps:

### Step 1: Identify the central metal and its oxidation state
- The central metal in the complex is cobalt (Co).
- The ligands attached to cobalt are:
- 4 ammonia (NH₃) ligands (which are neutral)
- 1 chloride (Cl⁻) ligand (which has a -1 charge)
- 1 nitro (NO₂) ligand (which typically has a -1 charge when it acts as a ligand)
- The overall charge of the complex is +1 (since there is one Cl⁻ outside the coordination sphere).

### Step 2: Calculate the oxidation state of cobalt
Let the oxidation state of cobalt be \(x\).
The equation for the charge balance is:
\[ x + 4(0) + (-1) + (-1) = +1 \]
This simplifies to:
\[ x - 2 = 1 \implies x = 3 \]
Thus, the oxidation state of cobalt is +3.

### Step 3: Name the ligands
- The ligands are named in alphabetical order:
- Ammonia (NH₃) is named "ammine."
- Chloride (Cl⁻) is named "chlorido."
- Nitro (NO₂) is named "nitrito" when it is acting as a ligand.

Since there are 4 ammine ligands, we use the prefix "tetra" for it.

### Step 4: Write the name of the complex ion
Putting it all together, we write the name of the complex ion as:
- Tetraammine
- Chlorido
- Nitrito
- Cobalt(III)

### Step 5: Combine the names and include the counter ion
Since the complex is a cation and there is a chloride ion outside the coordination sphere, we write:
- Tetraammine chlorido nitrito cobalt(III) chloride

### Final IUPAC Name
The IUPAC name of the compound \([Co(NH_3)_4Cl(NO_2)]Cl\) is:
**Tetraammine chlorido nitrito cobalt(III) chloride.**

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