Polydentate Ligands for resonance structures

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Nicole Elhosni 2I
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Joined: Fri Sep 28, 2018 12:28 am

Polydentate Ligands for resonance structures

Postby Nicole Elhosni 2I » Thu Nov 29, 2018 2:03 pm

Does resonance structure have any effect on whether a molecule can be polydentate?
For example, CO3 2-. The book said it could be either monodentate or bidentate, but I thought it might be tridentate since the electron density is the same between all three so each oxygen has electrons to donate.

Ramsha Dis1B
Posts: 32
Joined: Fri Sep 28, 2018 12:19 am

Re: Polydentate Ligands for resonance structures

Postby Ramsha Dis1B » Thu Nov 29, 2018 6:08 pm

Because of the negative 2 charge two of the Oxygen atoms have an extra lone pair of electrons so only those atoms want to bind to another atom. When one bonds it will be monodentate and when both Oxygen atoms bond to a different atom it will be bidentate.


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