Write the `IUPAC` names for the following coordination compounds:
(i). `[Co(NH_3)_6]Cl_3`
(ii). `[Co(NH_3)_5Cl]Cl_2`
(iii). `K_2[Fe(CN)_6]`
(iv). `K_3[Fe(C_2O_4)_3]`
(v). `K_2[PdCl_4]`
(vi). `[Pt(NH_3)_2Cl(NH_2CH_3)]Cl`

Explanation

To write the IUPAC names for the given coordination compounds, we will follow the systematic naming rules for coordination complexes. Here’s a step-by-step breakdown for each compound:

### (i) \[Co(NH_3)_6]Cl_3\]

1. **Identify the coordination sphere**: The complex ion is \[Co(NH_3)_6^{3+}\].
2. **Name the ligands**: The ligand is ammonia, which is named "ammine". Since there are six ammonia ligands, we use the prefix "hexa".
3. **Determine the metal and its oxidation state**: The central metal is cobalt (Co) and its oxidation state is +3.
4. **Combine the names**: The full name is "hexammine cobalt(III) chloride".
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