There are three types of coordination compounds
A. Simple Cation and Complex anion. Example- K4 [Fe (CN)6]
B. Complex Cation and Simple anion. Example- [ Cr {NH3)6] Cl3
C. Complex Cation and Complex anion. Example- [ Cr {NH3)6] [Co (CN)6]
1. Always write the name of cation first and anion later
2.Naming of complex entity
Names of Ligands in alphabetical order + name of metal atom/ion (add ’ate’ if complex is anion) + (Oxidation Number in Roman Numerals)
EXAMPLES-
K4 [Fe (CN)6] Potassium hexacyanoferrate (II)
[ Cr {NH3)6] Cl3 Hexaminechromium (III) chloride
[ Cr {NH3)6] [Co (CN)6] Hexaminechromium(III) hexacyanidocobaltaate(III)
[ Cr (NH3)Br(ox) ] Aminebromidooxalatochromium(III)
CHEMIGOD 