Concept explainers
Interpretation: The formula and charge of the complex has to be determined.
Concept introduction:
Coordination compounds:
The compounds having coordination covalent bonds which is formed when metal ions react with polar molecules or anions.
Ligands: The ions or molecules that forms coordination covalent bond with metal ions in a coordination compound. Ligands should have minimum one lone pair of electron, where it donates two electrons to the metal. Metal atom accepts the electron pair from a ligand forming a coordination bond.
Oxidation number: The total number of electrons in an atom after losing or gaining electrons to make a bond with another atom. It indicates the charge of an ion.
The rule to name a coordination complex is,
- 1. The cation is named before the anion.
- 2. Within a complex ion, the Ligands are arranged in an alphabetical order followed by the metal ion name. The anionic Ligand should ends with a letter –o, the neutral Ligand are called by the molecules (some common name for some exception).
- 3. When more Ligands are present, Greek prefixes like di, tri, tetra, penta, and hexa to specify their number.
- 4. The oxidation number of the metal is represented in roman numerals immediately following the metal ion name.
- 5. If the complex ion is an anion, the metal name should end with –ate.
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Chemistry & Chemical Reactivity