Polydentates

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Amina Durrani 3G
Posts: 52
Joined: Sat Jul 20, 2019 12:16 am

Polydentates

Postby Amina Durrani 3G » Sun Dec 01, 2019 2:13 pm

What's the significance of polydentates? Do ligands want to bind at multiple sites, or is there no correlation between that? Also, how do chelating ligands bind cations tightly?

Gerald Bernal1I
Posts: 102
Joined: Thu Jul 11, 2019 12:16 am

Re: Polydentates

Postby Gerald Bernal1I » Sun Dec 01, 2019 4:45 pm

Polydentates are just able to bind multiple molecules by having two or more lone pairs. A ligands ability to bind at multiple sites depends on its orbitals and number of electrons, therefore some ligands are only able to bind once and others are able to bind more. Chelating ligands bind cations tightly by having a high electron density of multiple ligands in close proximity therefore having a stronger bond. Chelating happens with tridentate and polydentate ligands like diethylenetriamine where it has three atoms attached to it therefore making it able to form a strong bond.


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