Boffis
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Reducing organic compounds with devarda's alloy?
I have a large jar of powdered Devarda's alloy that was once used for the analysis of nitrite and nitrate salts. Recently I was wondering if it could
be used to replace other aluminium alloys as a reducing agent for organic compounds such as nitro compounds in alkaline solution.
Has anyone ever tried it as an organic reducing agent? It has been discussed before on SM as a possible reducing agent for PETN but I thick the
alkaline solution required would cleave the nitrate groups in this case. I would imagine that it functionality would be similar to Al-Ga and
Al-amalgam.
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Fery
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Hi Boffis, I did not try, but have this - reduction of nitrobenzene to hydrazobenzene using Dewarda's alloy.
Attachment: vogel1958.pdf (927kB)
This file has been downloaded 220 times
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Boffis
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Hi Fery, many thanks for that paper! I think I can feel some experimental chemistry coming on! Devarda's alloy crops up on ebay fairly frequently in
the UK and its cheap.
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arkoma
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Interesting. I've got a furnace that gets hot enough to melt copper.
"We believe the knowledge and cultural heritage of mankind should be accessible to all people around the world, regardless of their wealth, social
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SWIM
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Might not even need to reach copper's melting point.
Molten aluminum will dissolve copper to some extent.
I just checked and the alloy boils at 906 C, so hopefully it can be made below that temperature.
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arkoma
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melted 25gm Cu, 22.5gm Al and 2.5gm Zn. Now just to figure out a use for it........
"We believe the knowledge and cultural heritage of mankind should be accessible to all people around the world, regardless of their wealth, social
status, nationality, citizenship, etc" z-lib
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Fery
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arkoma - well done and beautiful! Is the alloy fragile so could be grounded to dust? All my Dewarda's alloys are are very fine particle dust. Or is it
so reactive that it does not require pulverization?
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SWIM
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So is this stuff basically an activated form of aluminum?
Like aluminum/mercury amalgam?
Be nice to find a less toxic substitute for that.
edit: I have heard of copper activated zinc being used for some of the same reactions as Al/Hg.
[Edited on 10-11-2021 by SWIM]
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Triflic Acid
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Would be interesting if this could be used for a Clemmensen reduction, since it has a decent zinc quantity
There wasn't a fire, we just had an uncontrolled rapid oxidation event at the power plant.
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Boffis
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@ Swim, yes I think you are right that's why I was asking about its similarity with aluminium amalgam etc. Given the amount of discussion on this
forum given over to the aluminium-gallium alloy and related mixtures I thought this stuff seem to be a more accessible and cheaper alternative still.
Also its mercury free!
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