21.2 Naming Complex Ions and Coordination Compounds
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| RULES FOR NAMING COMPLEX IONS AND COORDINATION COMPOUNDS |
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| 1. Name the cation as the first word, then the anion as the second word in a coordination compound. Neutral complexes are named using a single word. |
| Specific to Complex Ions 2. Name the ligands first in alphabetical order. Use the appropriate Latin numerical prefix (di, tri, tetra, penta, hexa). Use the Greek prefixes (bis, tris, tetrakis, pentakis, hexakis) for polydentate ligands and for ligands that already begin with a latin prefix as part of their name (ex. diethylenetriamine). Hint: negatively charged ligands are all named ending with –o. |
| 3. Name the metal. If the complex ion is a cation or neutral use the English name of the metal. If the complex ion is an anion, add –ate to the ending. Use the Latin root in anions for the following: ferrate for Fe, cuprate for Cu, argentate for Ag, aurate for Au, plumbate for Pb, stannate for Sn. |
| 4. Give the oxidation state of the central metal ion in parenthesis. |
Name the following:[Cr(H2O)2(NH3)3Cl]2+
[AuCl4]2-
[Fe(en)3]2+
[Cr(H2O)2(NH3)3Cl]Cl2
Na2[AuCl4]
Provide the formula for the following: hexaamminenickel (II) hexacyanoferrate (II)