Naming Coordination Compounds

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Katrina Jang 2H
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Naming Coordination Compounds

Postby Katrina Jang 2H » Sun Nov 08, 2015 8:36 pm

When naming coordination compounds, how do you know whether to write aqua as H2O or as OH2?

For example, why is the aqua in sodium bisoxalato(diaqua)ferrate(III) is written as Fe[(OH2)2(C2O4)2], but the aqua in tetraamminediaquacobalt(III) bromide is written as [Co(NH3)4(H2O)2]Br3?

Michelle Dela Rosa 1D
Posts: 25
Joined: Fri Sep 25, 2015 3:00 am

Re: Naming Coordination Compounds

Postby Michelle Dela Rosa 1D » Sun Nov 08, 2015 8:48 pm

I think you can write aqua as either H2O or OH2 when naming coordination compounds. Some people write aqua as OH2 to emphasize the order of bonding since oxygen (not hydrogen) is the one binding to other elements, but writing H2O shouldn't be wrong either.

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