Monodentate and Bidentate

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Stevin1H
Posts: 89
Joined: Fri Sep 28, 2018 12:17 am

Monodentate and Bidentate

Postby Stevin1H » Thu Dec 06, 2018 10:18 am

How can a compound be both monodentate and bidentate? For example, in the book problem for 17.33 (6th edition), (CO3)2- can be either a monodentate or a bidentate.

aisteles1G
Posts: 117
Joined: Fri Sep 28, 2018 12:15 am

Re: Monodentate and Bidentate

Postby aisteles1G » Thu Dec 06, 2018 12:37 pm

It's because this compound has resonance structures that allow for different bondings. In one of them, two O atoms can bond to the same central atom (bidentate) in the other resonance structure only one of the O atoms can bond so monodentate. I think the most helpful thing would be to draw out lewis/resonance structures and see if the resonance structures change its ability to bond with the same central atom.


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