`BeCl_(2)` is not isostructural with

Options

A. `IC l_(2)^(-)`
B. `C_(2)H_(2)`
C. `XeF_(2)`
D. `GeCl_(2)`

Explanation

To determine which compound is not isostructural with BeCl₂, we need to analyze the structure of BeCl₂ and compare it with other compounds.

### Step-by-Step Solution:

1. **Identify the Structure of BeCl₂:**
- Beryllium chloride (BeCl₂) has a linear structure. This is due to the fact that beryllium (Be) has two valence electrons and forms two bonds with chlorine (Cl) atoms, resulting in a linear geometry.

2. **Analyze Other Compounds:**
- **ICl₂⁻ (Iodine Dichloride Ion):**
- Iodine (I) has 7 valence electrons. In ICl₂⁻, iodine gains an extra electron (due to the negative charge), giving it 8 valence electrons. The structure has 3 lone pairs and 2 bond pairs, resulting in a linear shape.
- **C₂H₂ (Acetylene):**
- Acetylene has a linear structure as well, with a triple bond between the two carbon atoms and single bonds to hydrogen atoms.
- **GeCl₂ (Germanium Dichloride):**
- Germanium (Ge) has 4 valence electrons. In GeCl₂, it forms two bonds with chlorine atoms and has one lone pair. This results in a bent structure, which is not linear.

3. **Conclusion:**
- Since BeCl₂ is linear and GeCl₂ is bent, they are not isostructural. Therefore, the compound that is not isostructural with BeCl₂ is GeCl₂.

### Final Answer:
**GeCl₂ is not isostructural with BeCl₂.**

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