The IUPAC name of `Ni (CO)_(4)` is

Options

A. tetracbonylnickelate (0)
B. tetracarbonyl nikel (II)
C. tetracarbonyl nickel (0)
D. tetracarbonyl nickelate (II )

Explanation

To determine the IUPAC name of the coordination compound Ni(CO)₄, we can follow these steps:

### Step 1: Identify the central metal atom
The central metal atom in the complex is nickel (Ni).

### Step 2: Identify the ligands
The ligand present in the complex is carbon monoxide (CO). Since CO is a neutral ligand, it does not affect the overall charge of the complex.

### Step 3: Determine the oxidation state of the metal
In this complex, CO is a neutral ligand, which means it does not contribute any charge. Therefore, the oxidation state of nickel in Ni(CO)₄ is 0.

### Step 4: Naming the ligands
When naming the ligands in coordination compounds, we use specific prefixes to indicate the number of ligands. Since there are four CO ligands, we use the prefix "tetra-". The name for the ligand CO is "carbonyl".

### Step 5: Combine the names
The IUPAC name is constructed by combining the name of the ligands with the name of the metal. Since the oxidation state of nickel is 0, we simply name it "nickel" without any additional suffix. Therefore, the full name of the complex is "tetra carbonyl nickel".

### Final Answer
The IUPAC name of Ni(CO)₄ is **tetra carbonyl nickel**.

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