In the reaction
`[CoCl_(2)(NH_(3))_(4)]^(o+)rarr[CoCl_(3)(NH_(3))_(3)]+NH_(3)`, only one
isomer of the complex product is obtained. Is the initial complex cis or trans ? .

Explanation

To determine whether the initial complex `[CoCl2(NH3)4]^(o+)` is cis or trans, we need to analyze the reaction and the geometry of the complexes involved.

### Step-by-Step Solution:

1. **Identify the Coordination Geometry**:
The complex `[CoCl2(NH3)4]^(o+)` has a cobalt ion in an octahedral coordination environment, as it is coordinated by six ligands (2 Cl and 4 NH3).

**Hint**: Remember that cobalt typically exhibits octahedral geometry when coordinated by six ligands.
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