Draw all the isomers (geometrical and optical) of:
(i) `[CoCl_(2)(en)_(2)]^(+)`
(ii) `[Co(NH_(3))Cl(en)_(2)]^(2+)`
(iii) `[Co(NH_(3))_(2)Cl_(2)(en)]^(+)`

Explanation

To solve the question of drawing all the isomers (geometrical and optical) for the given coordination compounds, we will approach each compound step by step.

### (i) For `[CoCl₂(en)₂]^(+)`:

1. **Identify the coordination geometry**: The complex has a cobalt ion (Co) with two chloride ions (Cl) and two ethylenediamine (en) ligands. Since en is a bidentate ligand, the coordination number is 6, leading to an octahedral geometry.

2. **Draw the geometrical isomers**:
- **Cis isomer**: In this arrangement, the two Cl ligands are adjacent to each other.
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