5.4 Nomenclature of coordination compounds · Part 3

(complex) [Fe(CN) ] - Ligands CN - Name of the ligand with prefix ligands - prefix: hexa Anionic ligand: cyanido-κC (Coordinating atom in CN - is carbon) hexacyanido-κC Central metal Fe (in anionic complex) ferrate Oxidation state of central metal (x) x + (- )= - x = - + = + (II) IUPAC Name: Potassium hexacyanido-κC ferrate(II) XII U5 Coordination XII U5 Coordination - - - - Example : Coordination Compound : [Co(NH ) Cl ]Cl Cation (complex) [Co(NH ) Cl ] + ligands NH and Cl - Name of the ligand (NH ) with prefix ligands - prefix: tetra Neutral ligand: ammine tetraamminedichlorido (alphabatically ammine comes before chlorido) ligands - prefix: di Anionic ligand: chlorido Central metal Co (in cationic complex) cobalt Oxidation state of central metal (x) x + ( ) + (- )= + x = + = + (III) Anion (simple) Cl - chloride IUPAC Name: Tetraamminedichloridocobalt(III) chloride Example :. Coordination Compound : [Cr(en) ][CrF ] Cation (complex) [Cr(en) ] + ligands en - (ethylenediamine) Name of the ligand with prefix (Ligand itself contains a Greek prefix - di, use alternate prefix) ligands - prefix: tris Neutral ligand: ethane- , -diamine tris(ethane- , - diamine) central metal Cr (in cationic complex) chromium Oxidation state of central metal (x) x + ( ) = + x = + (III) Anion (Complex) [CrF ] - ligands F - Name of the ligand with prefix ligands - prefix: hexa Anionic ligand: Fluorido hexafluorido central metal Cr (in anionic complex) chromate Oxidation state of central metal (x) x + (- )= – x = - + = + (III) IUPAC Name: Tris(ethane- , -diamine)chromium(III) hexafluoridochromate(III) XII U5 Coordination XII U5 Coordination - - - - More examples with names are given in the list below for better understanding of IUPAC Nomenclature: i. [Ag(NH ) ]Cl Diamminesilver(I) chloride ii. [Co(en) Cl ]Cl Dichloridobis(ethane- , -diamine)cobalt(III) chloride iii.