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Postby kshalbi » Sun Nov 08, 2015 8:46 pm

Can someone please explain to me why (CO3)^2- can be either mono or bidentate. Why can't it be polydentate?

Vicky Wang 2C
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Re: (CO3)^2-

Postby Vicky Wang 2C » Sun Nov 08, 2015 9:17 pm

(CO3)2- has 2 oxygen atoms that can act as donor atoms to bond to a central atom. This is because the two O atoms have a lower formal charge/ can act as a Lewis Base and donate an electron pair. (CO3)2- does not have more than 2 donor atoms though. Because of this, it can act as a monodentate ligand or a bidentate ligand, but no more than that. It can't be polydentate.

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