TM naming

[Hector Acosta Discussion 1H]

Can someone please explain in the most simple form possible on how we name these compounds.

[Scott Chin_1E]

(Greek prefix) + Ligand names in alphabetical order (that are bonded to the TM) + TM cation + (Roman Numeral) + (if there are anions within the coordination complex we will add a -o) + (if there are anions bonded to the coordination complex) the anion name + (Greek Prefix) + Hydrate.

For example:


The ligand name that is bonded to the TM is called Ammine. Since there are 5 Ammines bonded to the Cobalt (TM) we would use the Greek prefix "Penta-". Next we see that there is a Chlorine bonded to the Coordination Complex so we will drop the -ine from Chlorine and add "-o" to make "Chloro-". This name would become "Chlorocobalt". From the charges of each compound, we can deduce that the oxidation number of Cobalt is 2+ so we will use the Roman Numerals (II). Finally, since there is a Chlorine atom and 2 water atoms bonded, to the complex, we will use the name "Chloride Dihydrate".

The resulting name is:
Pentaammine Chlorocobalt (II) Chloride Dihydrate

[Kaelie Blanes-Ronda 2L]

There are two naming conventions: Ex. the older naming convention would use "cyano" and the newest IUPAC naming rules use "cyanido." You should be familiar with both and both will be acceptable on any exams.