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CuReUS
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i know that silver diazonium compounds can explode ,but complexes themselves,that is news
i feel it is counter-intuitive ,as we are taught that complexes are very stable compounds(Fe(CN)64- is not toxic although it has
cyanide ion
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zed
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Ummm. Don't let 'em dry out. Some of these complex ions, like to "simplify" themselves into materials that are very unstable.
As for Ferri-cyanides....they are sometimes utilized as components, in some impressive explosives.
Alas, we have gone way off topic. And, I'm not really an explosives guy. My interest is in avoiding explosions.
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CuReUS
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yesterday i saw nurdrage synthesis of luminol
http://www.youtube.com/watch?v=58Ve69s0qD0
he uses Na2S2O5 and Al to reduce the nitro to the amino to get luminol .
so can we use Na2S2O3 with Al to get the same result with 2,4 DAMP
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CuReUS
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in the hope of reviving this thread ,i ask a question that is bothering me for quite sometime now
how powerful a reducing agent is HI
can it reduce COOH to methyl directly (until recently i thought it couldn't but recently i read that it could. )
http://chemistry.tutorvista.com/organic-chemistry/carboxylic...
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CuReUS
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Quote: Originally posted by Nicodem  |
Do you have a reference for a non-CTH or non-catalyzed reduction of nitroaromatics with H3PO2? I have only seen CTH reductions
with this reagents |
maybe you already know this reaction,but i am posting it anyway
read this article,they use H3PO2 along with HI to reduce aromatic nitro group
Attachment: molecules-19-08039-v2.pdf (403kB)
This file has been downloaded 575 times
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Nicodem
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| Quote: Originally posted by CuReUS | maybe you already know this reaction,but i am posting it anyway
read this article,they use H3PO2 along with HI to reduce aromatic nitro group |
The article in Molecules 2014, 19, 8039-8050 mentions the reductions of some nitrophenols with hydriodic acid. The hypophosphorous
acid appears to be there only to quench the iodine which is the side product of the reduction (while it also recycles the iodine back to HI). This
example does not indicate that the hypophosphorous acid can reduce nitro groups. If anything, it might indicate the opposite.
| Quote: | | The nitrophenol compounds 8b–13b were then heated under reflux with 57% HI (10 mL) in the presence of 30% H3PO2 (1.0 mL).
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…there is a human touch of the cultist “believer” in every theorist that he must struggle against as being
unworthy of the scientist. Some of the greatest men of science have publicly repudiated a theory which earlier they hotly defended. In this lies their
scientific temper, not in the scientific defense of the theory. - Weston La Barre (Ghost Dance, 1972)
Read the The ScienceMadness Guidelines!
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Dr.Bob
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There are much gentler ways to reduce nitro groups than "reflux with 57% HI (10 mL) in the presence of 30% H3PO2 (1.0 mL). " Sodium dithionate
(Na2S2O5) works fine, even without Al (which I had not seen added before), Raney Nickel and many reductants, Sn, Fe, H2, etc. While it is always
interesting to read about another essoteric method, I don't think 57% HI is any easier to find or use than other methods. I can't think of many
things more common and iron and HCl, although I will admit that they form a mess and are not the ideal reducing agent, but a nitro group is pretty
easy to reduce.
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CuReUS
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could someone explain why sometimes formic acid can be used as a reducing agent and sometimes Al/hg and acid is used to reduce imines.Both can reduce
imimes,formic acid in eschenweiler-clarke and Al/hg +acid for reductive amination.so can they be used interchangebly ?
also,Zn/HCl can reduce C-C double bonds,but I think the yield will be small
https://books.google.co.in/books?id=AcpPyv0HWRsC&pg=SL1-...
go to the next page(A-98) and read the example of the clemmeson reduction of cyclic 1,3-diketone
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Darkstar
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Apparently so. According to this (see pages 44 and 45 of the .pdf), at high enough temperatures, HI will completely reduce carboxylic acids and even polyaromatic
hydrocarbons.
[Edited on 30-1-2015 by Darkstar]
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CuReUS
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can Drano be used as a reducing agent to reduce nitro to amine ?
I know that Metal/HCl and Metal/NaOH reductions on aromatic nitro compounds give different products,but has anyone ever tried it ?
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morganbw
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I have not. I generally run away from a chemical product that has additives.
That being said, perhaps it is worth a try????
[Edited on 2-4-2015 by morganbw]
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Chemosynthesis
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Drano is a company, not a single product.
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morganbw
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In a normal world Drano, clears drains, it it composed of not just NaOH.
Would you use a company to do a synth, or a product of said company?
I am confused by your post?
CuReUS ask a question, was it about a corporation or about a product?
[Edited on 2-4-2015 by morganbw]
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CuReUS
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sorry ,sorry everyone for the confusion .Of course I asked about the product -the drain cleaner. recently my house drain got blocked and I used
drano(the powder form) to unblock it.I was impressed how vigorously the reaction was happening (the powder and the water) and it became hot very
fast-like 25'c to 100'c in just 5 seconds
being an OTC minded guy,I immediately wondered whether it could be used for a nitro reduction, its dirt cheap.
but drano wiki says that they put NaNO3 in it to react with the H2 gas formed to covert from NO3- to
NH3 to reduce an explosion risk
http://en.wikipedia.org/wiki/Drano#Crystal_Drano
I guess that washes all hopes down the drain 
[Edited on 2-4-2015 by CuReUS]
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