Re: impurities in CDCl3


"Richard Schultz" <schultr@xxxxxxxxxxxxxxx> wrote in message
news:eh1pn4$5ii$2@xxxxxxxxxxxxxxxxxx
In article <4533C0CC.27571ECA@xxxxxxxxxxxxx>, Uncle Al
<UncleAl0@xxxxxxxxxxxxx> wrote:

:> I'm doing NMR measurements on diluted (0.1 mM) solutions in CDCl3. When
I
:> do overnight measurements on my compounds, I'm seeing extra peaks at
6.0
:> (quartet) and 2.0 ppm (doublet), and now I'm wondering what compound
this
:> might be. I was thinking it might be amylene, but the spectrum I found
for
:> amylene doesn't match this.

: Chloroform is stabilized with ethanol. It decomposes, especially in
: light with moisture, to phosgene and HCl.

Sieve dust seems to make the generation of HCl faster--presumably H2O
inhibits the photochemistry....


The NMR spectrum reported does not match that of ethanol, but don't let
that stop you.

Now would be a good time for you to keep your promise and leave us in
sci.chem alone.

Oh, come on, no need to be a jerk, he was trying to be helpful. And the HCl
could be related to the presence of DCE in his sample, now couldn't it?

Eric Lucas


.

Relevant Pages

  • Re: impurities in CDCl3
    ... do overnight measurements on my compounds, I'm seeing extra peaks at 6.0 ... : amylene doesn't match this. ... The spectrum is consistent with your extra compound being 1,1-dichloroethane. ...
    (sci.chem)
  • Re: impurities in CDCl3
    ... I'm doing NMR measurements on diluted solutions in CDCl3. ... do overnight measurements on my compounds, I'm seeing extra peaks at 6.0 ... amylene doesn't match this. ...
    (sci.chem)
  • impurities in CDCl3
    ... I'm doing NMR measurements on diluted solutions in CDCl3. ... do overnight measurements on my compounds, I'm seeing extra peaks at 6.0 ... amylene doesn't match this. ...
    (sci.chem)