oxygen in chelating agent

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EMurphy_2L
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Joined: Sat Sep 07, 2019 12:16 am

oxygen in chelating agent

Postby EMurphy_2L » Tue Dec 03, 2019 6:30 pm

if double bound oxygen is in Lewis base, is this polydentate? because oxygen has two lone pairs?

Ryan Yee 1J
Posts: 101
Joined: Sat Aug 17, 2019 12:16 am

Re: oxygen in chelating agent

Postby Ryan Yee 1J » Tue Dec 03, 2019 7:20 pm

A ligand can only be polydentate if it can form two different bonds in a coordination compound. Even though oxygen has two lone pairs, it cannot be bidentate because only one of the pairs can bind to the center atom. Take water, for example. Even though the Oxygen has two lone pairs, it is monodentate because only one of the lone pairs on oxygen can bind to the center atom with an acceptable overall electron density shape (such as octahedral or square planar or tetrahedral).


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