Ch.17-#31b (6th edition) Coordination Compounds

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Archana Biju 1G
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Joined: Fri Sep 28, 2018 12:18 am

Ch.17-#31b (6th edition) Coordination Compounds

Postby Archana Biju 1G » Mon Dec 03, 2018 3:42 pm

Write the formula for the following coordination compound: pentaamminesulfatocobalt(III) chloride.

I got the answer [CoSO4(NH3)5]Cl, but the book provided the answer [Co(NH3)5SO4]Cl. Is there a specific reason for (NH3)5 going before SO4?

Christine Chow 4G
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Joined: Fri Sep 28, 2018 12:28 am

Re: Ch.17-#31b (6th edition) Coordination Compounds

Postby Christine Chow 4G » Mon Dec 03, 2018 3:46 pm

when you write the chemical formula of a coordination compound, you are suppose to put the ligands in alphabetical order (so NH3 before SO4)

Tam To 1B
Posts: 72
Joined: Fri Sep 28, 2018 12:25 am

Re: Ch.17-#31b (6th edition) Coordination Compounds

Postby Tam To 1B » Mon Dec 03, 2018 3:47 pm

Yes, ligands should be written in alphabetical order, ignoring the prefix that indicates the number of each one present.
For example, in that particular compound, "ammine" comes before "sulfato" in alphabetical order, so NH3 is written first.


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