When to use -ate

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Parth Mungra
Posts: 72
Joined: Fri Sep 28, 2018 12:28 am

When to use -ate

Postby Parth Mungra » Tue Dec 04, 2018 1:28 pm

I was doing some problems from the homework set and I was confused when some problems used the suffix -ate.
In 6th ed, Chp 17 number 29 c, the formula is [Co(CN5)(OH2)2]2-. The name in the solutions manual is Aquapentaacyanocobaltate (III). I was wondering why the cobalt atom was called cobaltate instead of just cobalt.

Posts: 35
Joined: Fri Sep 28, 2018 12:24 am

Re: When to use -ate

Postby Francis_Nguyen3D » Tue Dec 04, 2018 1:55 pm

You use the suffix -ate at the end of the metal name when the entire complex has a negative charge. In this problem the complex has a 2- charge which explains the utilization of the suffix -ate.

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