Methyl Red
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Synthesis of Tetrakis(Pyridine)Silver(II) Peroxydisulfate
I followed https://sci-hub.se/https://doi.org/10.1002/9780470132630.ch3... on a eighth of its scale:
in a 500ml beaker with an ice bath, I added 225mls of water and 2.5g of potassium persulfate. I then mixed 20ml water, 1ml Pyridine, and 1ml of .4M
AgNO3 in a small beaker, and slowly pipetted that solution into the big solution. it has been around half an hour and it is cloudy and white, and I
will report when other results are obtained.
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DraconicAcid
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Nice. I've been meaning to try that for a decade or so.
Please remember: "Filtrate" is not a verb.
Write up your lab reports the way your instructor wants them, not the way your ex-instructor wants them.
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Methyl Red
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Update: The morning sun has killed it  all that's left is a slightly gray solution,
and it's not even worth recovering the 25 cents of silver in it.
the paper said the solution was to turn yellow, then orange, so I really should have suspected something was up when it stayed white.
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chempyre235
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That's too bad. At least you started with only 25 cents' worth. Maybe you could try it with the beaker away from any windows, and/or in an amber
beaker or bottle.
I have this on the list for things to try, as well. Seems like a fairly simple synthesis, with potential uses for organic reactions.
[Edited on 10/19/2025 by chempyre235]
"However beautiful the strategy, you should occasionally look at the results." -Winston Churchill
"I weep at the sight of flaming acetic anhydride." -@Madscientist
"...the elements shall melt with fervent heat..." -2 Peter 3:10
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