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Author: Subject: Thought Experiment: Making deuterated Compounds
Pyro
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[*] posted on 24-12-2015 at 13:50


Does D not replace H over time?
I remember reading somewhere that mixing C6H6 with D2O will eventually convert to H2O and C6D6

Edit: Whoops! Now the D is back in the formula :D

[Edited on 24-12-2015 by Pyro]




all above information is intellectual property of Pyro. :D
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alexchim
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[*] posted on 24-12-2015 at 14:04


Quote: Originally posted by Heavy Walter  
Standard conditions.
Electron impact, with quadrupole or magnetic sector.


I never observed MS signal for benzene. Maybe the ionisation unit of my lab is not powerful enough...
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alexchim
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[*] posted on 24-12-2015 at 14:06


Quote: Originally posted by Pyro  
Does D not replace H over time?
I remember reading somewhere that mixing C6H6 with D2O will eventually convert to H2O and C6H6


Yes, it is how CDCl3 is made, by mixing CHCl3 with D2O in several cascade reactors...
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Heavy Walter
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[*] posted on 24-12-2015 at 14:08


Hi Pyro
You are right in principle; but some of those displacements must to be forced.
By the way, in your formula D vanished...
In order to prepare deuterated PAH I will use a technique requiring acidity and temperature (adding DCl to a normal PAH and cooking it at 300 ° C).
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Heavy Walter
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[*] posted on 23-4-2016 at 06:56


Hi fluorescence

May be to add to your detailed list of deuterium labelings, see this procedure for chloroform and acetone:

Preparation of Deuterated Solvents for Nuclear Magnetic Resonance Spectrometry
P. J. Paulsen and W. D. Cooke, Baker laboratory, Cornell University, Ithaca, N. Y.
ANALYTICAL CHEMISTRY, 1963, 35, 1560.
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