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Topic: (NH4)2S with transition metals  (Read 4089 times)

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Offline zeoblade

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(NH4)2S with transition metals
« on: March 05, 2010, 02:48:17 AM »
When reacting Fe(II), Fe(III), Co(II) and Ni(II) with (NH4)2S I observed black precipitates for all and could not distinguish between any of them. I've tried searching online and in my textbook but I can't find any information or don't know the best keywords and terminology to find information on it.

I am wondering if any of those reactions are ionic or actually co-ordinate? I'm thinking they are ionic as below:

Co2+(aq) + (NH4)2S(l) --> CoS(s) + NH4+

However, I have a feeling it may not be so simple.

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Offline zeoblade

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Re: (NH4)2S with transition metals
« Reply #2 on: March 06, 2010, 12:06:00 AM »
Thanks, I wish I found this table before.

I am wondering if transition metal sulphides coordinate in a linear stereochemical complex arrangement so that each sulphide anion is directly opposing the other across the transition metal?

Or if the structure is bent?

But in Fe(III) I can't visualise how would the coordinate sulphide complex be?

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