sulphur forms a coordination bond with metal then the ligand is named thiocyanato-κS and if nitrogen is involved, then it is named thiocyanato-κN. XII U5 Coordination XII U5 Coordination - - - - Common name Formula IUPAC ligand name Bromide Br - bromido Chloride Cl - chlorido Fluoride F - fluorido Cyanide CN - cyanido Hydroxide OH - hydroxido Carbonate CO - carbonato Nitrate NO - nitrato Nitrite NO - ←NO - ; nitrito-κN ←ONO - ; nitrito-κO Sulphate SO - sulphato Sulphide S - sulphido Oxalate (ox) C O - oxalato Ethylenediamine (en) H N NH ethane- , -diamine Ethylenediaminetetraacetate (EDTA) N N - O O - O - - O , ', '', '''-(ethane- , - diyldinitrilo)tetraacetato Triphenylphosphine P(Ph) triphenylphosphane Pyridine (py) N pyridine iii. If the coordination entity contains more than one ligand of a particular type, the multiples of ligand ( , , etc...) is indicated by adding appropriate Greek prefixes (di, tri, tetra, etc...) to the name of the ligand. If the name of a ligand itself contains a Greek prefix (eg.
ethylenediamine), use an alternate prefixes (bis, tris, tetrakis etc..) to specify the multiples of such ligands. These numerical prefixes are not taken into account for alphabetising the name of ligands. b. Naming the central metal : In cationic/neutral complexes, the element name is used as such for naming the central metal atom/ion, whereas, a suffix 'ate' is used along with the element name in anionic complexes.
The oxidation state of the metal is written immediately after the metal name using roman numerals in parenthesis. XII U5 Coordination XII U5 Coordination - - - - Element Name of the metal in cationic complex anionic complex Cr Chromium Chromate Zn Zinc Zincate Al Aluminum Aluminate Fe Iron Ferrate Cu Copper Cuprate Co Cobalt Cobaltate Pb Lead Plumbate Ag Silver Argentate Sn Tin Stannate Au Gold Aurate Pt Platinum Platinate Naming of coordination compounds using IUPAC guidelines. Example : Coordination Compound : K [Fe(CN) ] Cation (Simple) K + Potassium Anion