# Nomenclature of Coordination compounds containing nitrogen

As Per rules , amine when present as a ligand is written as "ammine" with double m's , so a compound having a complex ligand such as ethane-1,2-diamine , will be written with 1 'm' amine or double 'm' ammine?

As per rules, double m is used when the ligand is just $$\ce{NH3}$$, ammonia:
E.g. in $$\ce{[CoCl(NH3)5]^{2+}}$$ pentaamminechloridocobalt(2+).
$$\ce{[Co(en)3]^{3+}}$$ tris(ethane-1,2-diamine)cobalt(3+).