Which of the following IUPAC names(s) is/are not correctly matched with its formula?

Options

A. Dichloridobis(ethane-1,2-diamine)cobalt(III) ion: `[CoCl_(2)(en)_(2)]^(+)`
B. Sodium (ethylenediaminetetraacetato)chromate(II): `Na_(2)[Cr(en)(CH_(3)COO)_(4)]`
C. Tris(bipyridyl)iron(II) ion: `[Fe(NH_(4)C_(5)-C_(5)H_(4)N)_(3)]^(2+)`
D. Ammineaquadibromidocopper(II): `[Cu(NH_(3))(H_(2)O)Br_(2)]`

Explanation

To solve the question of which IUPAC name is not correctly matched with its formula, we will analyze each option step by step.

### Step 1: Analyze the first compound
**IUPAC Name:** Dichlorido bis(ethane-1,2-diamine) cobalt(III)
**Analysis:**
- The name indicates a cobalt ion with a +3 charge (cobalt(III)).
- "Dichlorido" means there are two chlorine (Cl) ions.
- "Bis(ethane-1,2-diamine)" indicates that there are two ethane-1,2-diamine ligands (which is represented as en).
- Therefore, the formula should be: [Co(en)₂Cl₂]³⁺.
**Conclusion:** This matches correctly.

### Step 2: Analyze the second compound
**IUPAC Name:** Sodium ethylene diamine tetraacetate chromate(II)
**Analysis:**
- Sodium indicates the presence of Na⁺ outside the coordination sphere.
- "Chromate(II)" indicates chromium is the central metal with a +2 charge.
- "Ethylene diamine tetraacetate" refers to EDTA, which is a tetradentate ligand.
- The expected formula should be: Na₂[Cr(EDTA)].
- However, the name suggests a mismatch in the coordination number or the overall charge.
**Conclusion:** This does not match correctly.

### Step 3: Analyze the third compound
**IUPAC Name:** Tris(bipyridyl)iron(II)
**Analysis:**
- "Tris" indicates three bipyridyl ligands.
- "Iron(II)" indicates that iron has a +2 charge.
- The formula should be: [Fe(bipy)₃]²⁺ where bipy is bipyridine (C₁₀H₈N₂).
**Conclusion:** This matches correctly.

### Step 4: Analyze the fourth compound
**IUPAC Name:** Amine aqua dibromido copper(II)
**Analysis:**
- "Copper(II)" indicates that copper is the central metal with a +2 charge.
- "Amine" refers to NH₃ and "aqua" refers to H₂O.
- "Dibromido" indicates there are two bromine ions.
- Therefore, the expected formula should be: [Cu(NH₃)(H₂O)(Br)₂]²⁺.
**Conclusion:** This matches correctly.

### Final Conclusion
The IUPAC name that is not correctly matched with its formula is the second one: **Sodium ethylene diamine tetraacetate chromate(II)**.

---