chemisch
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Dimethylamine From Dimethylformamide
I'm trying to think of the practical issues of the synthesis of dimethylamine as it is a gas obviously soluble in water. Using hydrochloric would work
i would assume not sure the concentration 12M or less. Formic acid is also a product and how would i deal with purifying?
thanks in advance
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kristofvagyok
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Basic organic chemistry rule 1: a strong acid will make a salt more readily with a base than a weak acid.
So if you add HCl to the HNMe2, then HNMe2.HCl will be formed and the excess HCl and the formic acid could be distilled out.
Method no2 is to add some NaOH to the methylamine and formic acid solution and here the formic acid will react to give sodium formate and the
dimethylamine could be distilled out.
I would recommend the method no1 and convert back the base.HCl with some solid NaOH/KOH and distill the dimethylamine to a dry ice cooled flask (it
has a horrible smell, so be careful).
Shouldn't this fit in the beginnings section?
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chemisch
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that makes a ton of sense. thank you.
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chemisch
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Oh, one more quick question how would one attempt to concentrate? because attempting to make a 40% aqs solution sounds difficult
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Nicodem
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Thread Moved
4-11-2012 at 03:30 |
Nicodem
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The preparation of dimethylamine from DMF has already been described. UTFSE before opening new threads and open threads without references only in
the Beginnings section.
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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)
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chemrox
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Quote: Originally posted by Nicodem  | | The preparation of dimethylamine from DMF has already been described. UTFSE before opening new threads and open threads without references only in
the Beginnings section. |
I ran multiple searches for this method and got only brief mentions.
"When you let the dumbasses vote you end up with populism followed by autocracy and getting back is a bitch." Plato (sort of)
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Mr_Magnesium
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| Quote: Originally posted by chemrox | | Quote: Originally posted by Nicodem | | The preparation of dimethylamine from DMF has already been described. UTFSE before opening new threads and open threads without references only in
the Beginnings section. |
I ran multiple searches for this method and got only brief mentions. |
http://www.sciencemadness.org/talk/viewthread.php?tid=11634
i was planning on making the compound which pantone posted about  scroll down a
bit and you'll see it.
Which leads to: DMF + NaOH
Heat the solution till gas evolves which leads to another flask and the dimethylamine dissolves in there.
http://www.sciencemadness.org/talk/viewthread.php?tid=9139
http://www.sciencemadness.org/talk/viewthread.php?tid=20361
Just look for the big paragraphs in the threads, there is a write up if you would like to read.
[Edited on 25-12-2013 by Mr_Magnesium]
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