Two compounds with the formula `[Co(NH_(3))_(4)Cl_(2)]^(+)Cl^(-)` exist. One of the has violet colour whereas the other has green colour. One of them is ….. Isomer whereas the other is …… isomer.

Explanation

To solve the problem regarding the two compounds with the formula \([Co(NH_3)_4Cl_2]^+Cl^-\), we need to identify the types of isomers present based on their structural arrangements.

### Step-by-Step Solution:

1. **Identify the Coordination Complex**:
The given formula is \([Co(NH_3)_4Cl_2]^+Cl^-\). Here, cobalt (Co) is the central metal atom, and it is coordinated to four ammonia (NH3) ligands and two chloride (Cl) ligands.

**Hint**: Remember that the coordination number of cobalt in this complex is 6 (4 from NH3 and 2 from Cl).
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