Coordination Compound Naming

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KMcFarland_2L
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Joined: Wed Sep 30, 2020 9:52 pm

Coordination Compound Naming

Postby KMcFarland_2L » Mon Nov 30, 2020 2:34 pm

If the second ligand has more than one atom, do you also put a greek prefix before that ligand? For example, [Co(NH3)5Cl2], would the ligands be written, penta ammine di chloro?

Samantha Pedersen 2K
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Re: Coordination Compound Naming

Postby Samantha Pedersen 2K » Mon Nov 30, 2020 2:45 pm

Yes, you should put a Greek prefix before each ligand of which there is more than one. I believe you're correct that the ligands would be written as pentaamminedichloro in this case!

Nicolette Simoni 3L
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Re: Coordination Compound Naming

Postby Nicolette Simoni 3L » Mon Nov 30, 2020 4:07 pm

Hi!

You are right, you must place a prefix of the number of ligands present before each ligand. Keep in mind, if your ligand already has a prefix (ex. diethylenetriamine) and there are more than one, there is a different set of prefixes to use to avoid redundancy. So, you must use Bis- for 2 ligands, Tris- for 3, Tetrakis for 4, and Pentakis for 5.

Hope this helps!

Samuel Flores 1E
Posts: 90
Joined: Wed Sep 30, 2020 9:51 pm

Re: Coordination Compound Naming

Postby Samuel Flores 1E » Mon Nov 30, 2020 4:47 pm

Hello! Yes, you did the problem correctly! For every ligand that is in the quantity of two or more (within the coordination sphere of a given coordination compound), we will always put the Greek prefix (e.g. di, tri, tetra, etc) before the ligand when naming the coordination compound. So therefore, you will put "di-" in front of chloro and "penta-" in front of ammine.

Hope this helps!


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