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Naming Coordination Compounds

Posted: Sun Nov 15, 2015 11:05 pm
by Mya Majewski 1L
Can somebody give a list of steps in naming coordination compounds? How do you know the oxidation numbers for each metal ion?

Re: Naming Coordination Compounds

Posted: Sun Nov 15, 2015 11:41 pm
by Sol Lee 2H
To name a coordination compound, whether the complex ion is the cation or the anion, always name the cation first.

1. Name the ligands first in alphabetical order.
-For anionic ligands:
-- -o: -ide
-- -ide: -ate
-- -ite: -ito
-For neutral ligands:
--the common name of the molecule is used (ex: O^2-: oxo).

2. Use greek prefixes to designate the number of each type of ligand in the complex ion.

3. Name the central metal.
-If the complex ion is a cation, the metal is named the same as the element. If the complex ion is an anion, the name of the metal ends with -ate.
-write the oxidation state of the metal in the complex expressed in Roman numerals in parentheses.
-name the cation before the anion.
-to name a neutral complex molecule, follow the rules of naming a complex cation.

*the oxidation state of the complex ion can be determined from looking at the number of bonding parts with the complex ion and the charges each part of the coordination compound contribute (ex: if three chlorides bind with the complex ion, the charge on the complex ion must be +3 if the compound is electrically neutral).