Name of complex compound

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CenCen
Posts: 29
Joined: Fri Sep 25, 2015 3:00 am

Name of complex compound

Postby CenCen » Sun Nov 15, 2015 8:38 pm

in fall 2014 quiz 3 preparation question 2 it says to name Na[Co(NH3)3Cl3]

in the solution it says that for Cobalt it's Colbaltate. I just want to know why its not just cobalt.

the solution is: sodium triamminetrichlorocobaltate(II)

PaigeBlack
Posts: 32
Joined: Fri Sep 25, 2015 3:00 am

Re: Name of complex compound

Postby PaigeBlack » Sun Nov 15, 2015 8:46 pm

When naming a coordination compound, you add the suffix -ate to the end of the name if the complex has a negative charge.
In the compound Na[Co(NH3)3Cl3], the complex- [Co(NH3)3Cl3] -must have a negative charge overall as it is bonded to an Na+ ion. Therefore, the name would be triamminetrichlorocobaltate(II), as stated in the solutions.


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