Polydentate
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Polydentate
How can we tell if a ligand is polydentate so that we know whether to use bis-, tris-, tetrakis-, etc?
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Re: Polydentate
If a ligand can bond to the central metal atom with two atoms, it is bidentate. For three atoms, it is tridentate. For any more, the term polydentate is typically used.
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Re: Polydentate
Ligands with more than one bonded atom (central metal atom) are considered polydentate. The prefixes mentioned are used with composite ligand names to avoid confusion.
Re: Polydentate
In the ligand worksheet that is on the class website, remember that ox, en, dien, and edta are all polydentate. So you would use bis and tris instead of bi and tri.
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Re: Polydentate
It's also helpful to see if the molecule has nitrogen, oxygen, or sulfur atoms with lone pairs because these are common binding sites for ligands and thus would make the molecule polydentate.
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