Cobalt and Cobaltate?

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Antonio Melgoza 2K
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Joined: Fri Sep 25, 2015 3:00 am

Cobalt and Cobaltate?

Postby Antonio Melgoza 2K » Thu Nov 19, 2015 10:08 am

I'm not sure when to use cobalt and cobaltate. Like for [Co(NH3)6]^(3+) Why is it cobaltate instead of just cobalt. And for
[Co(CN)5(H20)]^(2-) why is cobalt used instead of cobaltate? I thought you add the -ate when the complex has a negative charge?

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

Re: Cobalt and Cobaltate?

Postby 604599327 » Thu Nov 19, 2015 2:28 pm

Yes, you would use the "ate" suffix version if the compound is an anion, or has a negative charge, while the regular version would be used for positive or if the net charge is 0. Also I believe that [Co(NH3)6]^(3+) is Hexaamminecobalt(III) and [Co(CN)5(H20)]^(2-) is Aquopentacyanocobaltate (III), which would again follow the above explanation. Hope this helps!

Bilal Ismail Ahmed 3G
Posts: 7
Joined: Tue Sep 29, 2015 3:00 am

Re: Cobalt and Cobaltate?

Postby Bilal Ismail Ahmed 3G » Sun Nov 22, 2015 6:38 pm

When naming a compound with an -ate ("cobaltate"), is there any way we need to specify what the negative charge on the ion is? Or is that simply derived from the other charges?

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