IUPAC name of `[Fe(O_(2))(CN)_(4)Cl]^(4-)` is:

Options

A. Chlorotetracyano dioxoferrate (II) ion
B. Chlorotetracyano peroxoferrate (II) ion
C. Chlorotetracyano superoxoferrate (II)ion
D. Tetracyanochloro superoxoferrate (II)ion

Answer

To determine the IUPAC name of the coordination compound \([Fe(O_2)(CN)_4Cl]^{4-}\), we will follow these steps:

### Step 1: Determine the oxidation state of iron (Fe)
Let the oxidation state of iron be \(x\).

- The superoxide ion \((O_2)^{1-}\) contributes \(-1\).
- Each cyanide ion \((CN)^{-}\) contributes \(-1\), and since there are 4 cyanide ions, they contribute \(-4\).
- The chloride ion \((Cl)^{-}\) contributes \(-1\).

Now, we can set up the equation based on the overall charge of the complex:

\[ x + (-1) + (-4) + (-1) = -4 \]

Simplifying this, we get:

\[ x - 6 = -4 \]

Solving for \(x\):

\[ x = -4 + 6 = +2 \]

Thus, the oxidation state of iron is \(+2\).

### Step 2: Identify the ligands and their prefixes
The ligands in the complex are:

- Superoxide \((O_2)^{1-}\) is referred to as "supraxo".
- Cyanide \((CN)^{-}\) is referred to as "cyano".
- Chloride \((Cl)^{-}\) is referred to as "chloro".

### Step 3: Determine the number of each ligand
- There is 1 superoxide ligand.
- There are 4 cyanide ligands.
- There is 1 chloride ligand.

### Step 4: Name the ligands in alphabetical order
When naming coordination compounds, ligands are named in alphabetical order regardless of their quantity.

- "chloro" (for Cl)
- "cyano" (for CN)
- "supraxo" (for O2)

### Step 5: Use the appropriate prefixes
- For 4 cyanide ligands, we use the prefix "tetra".
- For 1 superoxide ligand, we do not need a prefix.
- For 1 chloride ligand, we do not need a prefix.

### Step 6: Combine the names of the ligands with the metal name
The name of the metal is "iron", and since it has an oxidation state of \(+2\), we denote this as "iron(II)".

### Step 7: Formulate the complete name
Putting it all together, we have:

- Ligands: tetra-cyano, chloro, supraxo
- Metal: iron(II)

The final IUPAC name of the compound is:

**tetrachlorosupraxoferrate(II)**

### Summary
The IUPAC name of \([Fe(O_2)(CN)_4Cl]^{4-}\) is **tetrachlorosupraxoferrate(II)**.

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