dantate and angle

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May Xiao 1H
Posts: 14
Joined: Fri Sep 28, 2018 12:18 am

dantate and angle

Postby May Xiao 1H » Sat Dec 08, 2018 9:19 am

why do 2 lone pairs on one coordinate compound have to be seperated more than 90degrees to form 2 different dantates?
ex: CO3^2- is ususally monodantate

Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

Re: dantate and angle

Postby Theodore_Herring_1A » Sat Dec 08, 2018 10:16 am

Two lone pairs have to be more than 90 degrees to be polydentate because of repulsion between the lone pairs. Repulsion between the lone pairs binding to the same central atom prevents them from being closer than 90 degrees.

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