The IUPAC name of the coordination compound `[NICl(NO_2)(PPh_3)_2]` is :

Options

A. Chloridonitrito-N-bis(triphenylphosphine)nickel(II)
B. Chloridonitrito-O-bis(triphenylphosphine)nickel(II)
C. Chloridonitrito-N-bis(triphenylphosphine)nickelate(II)
D. Chloridonitrito-N-ditriphenylphosphinenickel(II)

Explanation

To determine the IUPAC name of the coordination compound \([NiCl(NO_2)(PPh_3)_2]\), we will follow the systematic approach for naming coordination compounds. Here’s the step-by-step solution:

### Step 1: Identify the Ligands
The ligands in the compound are:
- Chloride ion (Cl)
- Nitrite ion (NO2)
- Triphenylphosphine (PPh3)

### Step 2: Name the Ligands
- The chloride ion is named as "chlorido".
- The nitrite ion (NO2) can attach through nitrogen or oxygen. Here, we will consider it as "nitrito" and specify that it is attached through the nitrogen atom, denoting it as "nitrito-N".
- Triphenylphosphine is named as "triphenylphosphine". Since there are two triphenylphosphine ligands, we will use the prefix "bis" to indicate the presence of two identical ligands.

### Step 3: Arrange the Ligands Alphabetically
When naming coordination compounds, ligands are listed in alphabetical order based on their names (ignoring any prefixes like di-, tri-, bis). Therefore, the order will be:
1. Chlorido
2. Nitrito-N
3. Bis triphenylphosphine

### Step 4: Identify the Central Metal Atom and Its Oxidation State
The central metal atom is nickel (Ni). To find its oxidation state, we can set up the equation based on the charges of the ligands:
- Chlorido (Cl) contributes -1
- Nitrito (NO2) contributes -1
- Each triphenylphosphine (PPh3) is neutral (0)

Let \( x \) be the oxidation state of nickel:
\[ x - 1 - 1 + 0 = 0 \implies x - 2 = 0 \implies x = +2 \]
Thus, the oxidation state of nickel is +2.

### Step 5: Combine the Names
Now we can combine the names of the ligands and the central metal with its oxidation state:
- The full name will be: **chlorido nitrito-N bis triphenylphosphine nickel(II)**.

### Final IUPAC Name
The IUPAC name of the coordination compound \([NiCl(NO_2)(PPh_3)_2]\) is:
**Chlorido nitrito-N bis triphenylphosphine nickel(II)**.

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