![]() For example:Ģ+ Dichloridobis (1, 2 - ethanediamine) platinum (IV) ion.ģ+ Tris(ethanediamine)cobalt (III) ion. then we use bis - (for two), tris (for three) as prefix. If the ligands itself include di, tri etc. Then the name the metal atom is written followed by its oxidation state in Roman numerals.įor example: SO4 Tetra ammine copper (II) sulphate In case of polydentate ligands, ligands are named alphabetically using a prefix di, tri, tetra, penta etc, to indicate the number of ligands of that type present. The ligands are then listed in alphabetical order. nomenclature Step to name a complex compound are:Ĭations are always named before the anions. ![]() The oxidation number is indicated by Roman numerals. oxidation number The oxidation number of the central atom is defined as the charge left on a given atom when all other atom in a complex are removed as ions. For example: In K4, Fe has coordination number 6. Coordination number It is defined as the number of coordinate bonds formed by central metal atom, with the ligands.
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