shape when given a formula for a complex ion

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Mariah Tumbaga 1e
Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

shape when given a formula for a complex ion

Postby Mariah Tumbaga 1e » Sun Dec 06, 2015 1:14 am

how do you figure out the shape from a formula?
ex: [Co(en)2(Br)2]
it is octahedral but why?

Samantha Miceli 3J
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Re: shape when given a formula for a complex ion

Postby Samantha Miceli 3J » Sun Dec 06, 2015 1:18 am

Ethylenediamine is bidentate, so it can form two bonds. Because there are two of these and two bromine attached to Cobalt, there are six bonds total. This gives a VSEPR formula of AX6, which is octahedral.


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