What is the name of the complex `[Ni(H_(2)O)_(4)(NH_(2)CH_(2)CH_(2)NH_(2))]SO_(4).5H_(2)O` as per IUPAC rules ?

Options

A. Aquaethylenediamine nickel (II) sulphate 1-water
B. Tetraaquaethylenediamine nickel (II) sulphate-5-water
C. Tetraaqua bis (ethylene diamine ) nickel (II) sulphate-5-water
D. Tetraaqua bis (ethylene -diamine ) nickel (III) sulphate-5-water

Answer

To name the complex `[Ni(H₂O)₄(NH₂CH₂CH₂NH₂)]SO₄·5H₂O` according to IUPAC rules, follow these steps:

### Step 1: Identify the components of the complex
- The complex consists of a central metal ion, which is Nickel (Ni).
- The ligands attached to Nickel are:
- 4 water molecules (H₂O), which are neutral ligands and are named "aqua".
- 1 ethylenediamine (NH₂CH₂CH₂NH₂), which is a bidentate ligand and is named "ethylenediamine".

### Step 2: Determine the oxidation state of Nickel
- The sulfate ion (SO₄²⁻) has a charge of -2.
- The overall charge of the complex cation must balance the charge of the sulfate ion.
- Since the ligands (4 aqua and 1 ethylenediamine) are neutral, the charge on Nickel must be +2 to balance the -2 charge from sulfate.
- Therefore, the oxidation state of Nickel (Ni) is +2.

### Step 3: Count the ligands and their prefixes
- There are 4 water ligands, which will be indicated as "tetra" (for four).
- There is 1 ethylenediamine ligand, which does not require a prefix as "bis" (which indicates two) is not applicable here.

### Step 4: Write the name of the complex
- According to IUPAC naming conventions, ligands are named in alphabetical order regardless of their prefixes.
- "Aqua" comes before "ethylenediamine" in alphabetical order.
- Therefore, the name of the complex will start with "tetra aqua", followed by "ethylenediamine".

### Step 5: Include the oxidation state and the anion
- The central metal is Nickel, and its oxidation state is +2, so we write "nickel(II)".
- The anion is sulfate, which is simply named "sulfate".
- Finally, we have 5 water molecules of crystallization, which are named "5 water".

### Final Name
Putting it all together, the name of the complex is:
**Tetra aqua ethylenediamine nickel(II) sulfate pentahydrate.**

### Summary
The full name of the complex `[Ni(H₂O)₄(NH₂CH₂CH₂NH₂)]SO₄·5H₂O` is:
**Tetra aqua ethylenediamine nickel(II) sulfate pentahydrate.**