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Doris Cho 1D
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Postby Doris Cho 1D » Sun Nov 24, 2019 6:38 pm

How do you determine if a ligand can be polydentate?

Ariel Davydov 1C
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Re: 9c.5

Postby Ariel Davydov 1C » Mon Nov 25, 2019 12:15 pm

A ligand can be polydentate if it has multiple locations where it can give up a lone pair AND its geometry allows for it to do so. An example of a ligand with multiple shareable lone pairs but that is not a polydentate is H2O, whose bent shape only allows for it to share one lone pair. Examples of polydentate ligands include more wellknown molecules such as ethylenediamine (bidentate, two nitrogens allow for two lone pairs to be shared), diethylenetriamine (tridentate, three nitrogens), and EDTA (hexadentate, multiple oxygens).

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