2, +2

6, +2

2, 0

6, 0

Diabetes

Ulcer

Arthritis

Malaria

bis (ethylenediamine) chloronitrito−O−cobalt (III) ion

bis (ethylenediamine) chloronitrito−O−cobaltate (III) ion

chlorodiethlydiamine nitrite−O−cobalt (III) ion

chlorodiethlydiamine nitrocobalt (III) ion

diammine (ethylenediamine) nitratoruthenium (III)

diammine (ethylenediamine) ruthenium (II) nitrate

diamminebis (ethylenediamine) ruthenium (III) nitrate

(ethylenediamine) diammineruthenium (II) nitrate

The charge on the complex ion in K₂[PtCl₄] is +2

The coordination number of Hg in [Hg(en)₂]²⁺ is 4

The oxidation number of Fe in [Fe(CN)₆]⁴⁻ is +6

In transition metal complexes, ligands act as Lewis acid