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Calvin Huang 3D
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Postby Calvin Huang 3D » Tue Nov 15, 2016 11:16 pm

With regards to writing the formula for coordination compounds, what does the "bis" in "bisethylenediamine" mean?

Elisse Albian 3D
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Re: Bis

Postby Elisse Albian 3D » Tue Nov 15, 2016 11:36 pm

It refers to two diethylenetriamine (dien) ligands. "Bis" serves the same purpose as di, however it is used when a prefix (like di, tri, etc.) is already included in the ligand name.

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Re: Bis

Postby DBaquero » Fri Nov 18, 2016 7:45 pm

Bisethylenediamine refers to two ethylenediamine ligands, not two diethylenetriamine ligands. In the case of two (dien) ligands it would be bisdiethylentriamine. Bis (or tris, quadris,etc) are used when the typical prefixes (di,tri,tetra, etc) can lead to ambiguity or confusion because adding the regular prefix would be naming a whole new chemical.
hope that helps

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Re: Bis

Postby Wenqian_Deng_1L » Sun Dec 04, 2016 9:15 pm

So when do we use bis-, tris-, tetrakis-, pentakis-, etc?

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