Wrtie the formulas for the following coordination compounds:
(i). Tetraamminediaquacobalt(III) chloride.
(ii). Potassium tetracyanidonichelate(II).
(iii). Tris(ethane-1,2-diamine) chromium(III) chloride.
(iv) Amminebromidochloridonitrito-N-Platinate(II).
(v). Dichlororidobis (ethane-1,2-diamine) platinum(IV) nitrate.
(vi). Iron(III) hexacyanidoferrate(II).

Explanation

(i) `[Co(NH_(3))_(4)(H_(2)O)_(2)]Cl_(3)`
(ii) `K_(2)[Ni(CN)_(4)]`
(iii) `[Cr(en)_(3)]Cl_(3)`
(iv) `[Pt(NH_(3))BrCl(NO_(2))]^(-)`
(v) `[PtCl_(2)(en)_(2)](NO_(3))_(2)`
(vi) `Fe_(4)[Fe(CN)_(6)]_(3)`