Ligands are ordered alphabetically by name and precede the central atom name. The number of ligands coordinating is indicated by the prefixes di-, tri-, tetra- penta- etc. for simple ligands or bis-, tris-, tetrakis-, etc. for complex ligands. For example:
*[CoCl(NH)]Cl pentaamminechloridocobalt(3+) chloride where ammine (NH)precedes chloride. The central atom  come after the ligands. Where there is more than one central atom it is preceded by di- tri-, tetra- etc.
* Os(CO), dodecacarbonyltriosmium
Where there are different central atoms they are sequenced using the electronegativity list.
*[ReCo(CO)] nonacarbonylrheniumcobalt