Hexavalent - 10-7-2012 at 11:43
I am about to undertake the synthesis of this compound using the details given here; http://wwwchem.uwimona.edu.jm/lab_manuals/c21jexpt.html - see 'Experiment 2' - and ferrous ammonium sulfate is needed. Ferrous = Fe2+.
I only have ferric ammonium sulfate - ferric = Fe3+. Can I use this, or does it need to be reduced to the iron (II) salt first?
The final product has iron (III) in the complex...so could one use an iron (III) salt to begin with and omit the step where it is oxidized?
SulfurApothecary - 10-7-2012 at 20:42
Hey I did this 
it was fun it has a nice green salt at the end. I believe you can
use the Fe3+. I used Fe3+ and did not do the oxidization step. I just dissolved the two in hot water, and cooled it too freezing point to precipitated
out the complex, the vacuum filtered it and washed it with acetone. And instead of the potassium oxalate I used oxalic acid. This works really well in
my experience.
This is a sample of my product:
barley81 - 11-7-2012 at 06:02
If you didn't use potassium oxalate, what source of potassium did you use? KOH?
SulfurApothecary - 11-7-2012 at 17:14
Actually, checking back at my notes, I did use potassium oxalate, sorry...
Hexavalent - 12-7-2012 at 09:41
Thanks for that.
I assume that the oxidation step is just the addition of the peroxide, and that was what you omitted?