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Science Forum Index » Chemistry Forum » Diazomethane: comparison of preparations...
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| George Orwell... |
 Posted: Thu Jun 05, 2008 12:56 pm |
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Somewhere, I have a reprint of a fairly recent (>2000?) paper
that compares different preps of CH2N2. E.g., Diazald, MNNG,
N-methyl-N-nitrosourea, N-methyl-N-nitroso-urethane as sources
for esterification of PhCO2H. They were looking at time,
number of equivalents needed, yield, etc. About all I
remember for sure is that NMU was the best source (by their
criteria).
The problem is, I can't find the paper using any database at
my disposal, which includes SciFinder, Web of Science, etc.
Does anybody know this "COMPARISON OF CH2N2 PREPS" paper?
Please post the reference. THANK YOU.
Il mittente di questo messaggio|The sender address of this
non corrisponde ad un utente |message is not related to a real
reale ma all'indirizzo fittizio|person but to a fake address of an
di un sistema anonimizzatore |anonymous system
Per maggiori informazioni |For more info
https://www.mixmaster.it |
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| Posted: Thu Jun 05, 2008 4:06 pm |
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On Jun 5, 3:56 pm, George Orwell <nob... at (no spam) mixmaster.it> wrote:
Quote: Somewhere, I have a reprint of a fairly recent (>2000?) paper
that compares different preps of CH2N2. E.g., Diazald, MNNG,
N-methyl-N-nitrosourea, N-methyl-N-nitroso-urethane as sources
for esterification of PhCO2H. They were looking at time,
number of equivalents needed, yield, etc. About all I
remember for sure is that NMU was the best source (by their
criteria).
The problem is, I can't find the paper using any database at
my disposal, which includes SciFinder, Web of Science, etc.
Does anybody know this "COMPARISON OF CH2N2 PREPS" paper?
Please post the reference. THANK YOU.
Il mittente di questo messaggio|The sender address of this
non corrisponde ad un utente |message is not related to a real
reale ma all'indirizzo fittizio|person but to a fake address of an
di un sistema anonimizzatore |anonymous system
Per maggiori informazioni |For more info
https://www.mixmaster.it
Diazomethane is known to be a potential explosive. You risk your life
and the lives of your loved ones by your stupidity. You seem to have
the ability to research. Do you have the ability to think?
Diazomethane is a methylating agent. If you do not have the legitimacy
to purchase diazomethane, like I do, which do not think through tour
objective and consider alternative methylation agents.
Or is your objective in fact to obtain an explosive material without
think through alternatives. If that is the case I advice you to go to
a gunshop. Purchase bulk guncotton. Melt it down with acetone. Now you
have an explosiev and you still run thr greater risk of blowing your
han off. But at least I got you to that point faster than you could
get there on your own steam.
STUPID+ |
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| Madalch... |
| Posted: Thu Jun 05, 2008 6:01 pm |
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On Jun 5, 7:06 pm, nico... at (no spam) hushmail.com wrote:
Quote: Diazomethane is known to be a potential explosive. You risk your life
and the lives of your loved ones by your stupidity. You seem to have
the ability to research. Do you have the ability to think?
Yes, it's explosive, but it's relatively safe to make and use in
situ. Many chemists do it quite often, and I don't think we all
deserve to be dismissed as "STUPID+" for doing so. |
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| Nomen Nescio... |
| Posted: Thu Jun 05, 2008 9:40 pm |
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Quote: Does anybody know this "COMPARISON OF CH2N2 PREPS" paper?
Please post the reference. THANK YOU.
[...]
Diazomethane is known to be a potential explosive. You risk
your life and the lives of your loved ones by your stupidity.
You seem to have the ability to research. Do you have the
ability to think?
Diazomethane is a methylating agent. If you do not have the
legitimacy to purchase diazomethane, like I do, [...]
I surely question THAT claim.
No one sells diazomethane (as in "diazomethane in a bottle")
that can be legally shipped by any carrier in the US and
probably in any other civilized (i.e., regulated) country.
Whether as a gas or in solution, it is too explosive under
conditions of temperature, pressure shock and almost every
other routine stability test.
Perhaps you purchase "diazomethane services" and have a step
carried out by a third party (e.g., Aerojet); perhaps you
mean you purchase the precursors. I don't care what you mean.
Your reply was irrelevant to my Q and my purpose.
There is a paper by someone who compared the rates and
efficiencies of esterification of benzoic acid using the
common CH2N2 precursors under standard conditions: Diazald
at 60 C; NMU at O C; etc.
In the hands of competent, trained chemists, the determination
was that NMU gave the fastest, highest yield with the least
waste (something like ~0 C, 10 minutes, 1 eq, 90%). Because
Diazald is prepped at higher temps and requires longer reaction
times and distillation (during which time you can lose CH2N2
due to polymerization or other decomposition), they had much
lower yield and required a much larger excess to obtain a 90%
yield of methyl benzoate.
I know what I am looking for ("the paper") but don't have the
bib info. I have searched the professionals' electronic
databases. I think they (CAS, STN, Web of Sci, Beilstein,
et al) have incorrectly tagged this paper or skipped it
completely. (The databases are FULL of errors and omissions.)
That is why I am asking for help from chemists here (sci.chem)
who read the literature and may remember this paper and can
help me to locate it.)
The paper is in English; it was probably a second tier
journal (OPPI? Synth Commun?). THANK YOU for your help
finding the paper, not for your ad hominen remarks. |
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| hanson... |
| Posted: Fri Jun 06, 2008 1:05 am |
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== ahahaha... AHAHAHAHA... ahahaha ==
Quote:
nicovarse aka <nicovar at (no spam) hushmail.com> wrote in message
news:b3d1ccf2-c677-472f-a291-523deee11468 at (no spam) i36g2000prf.googlegroups.com...
Quote:
George Orwell <nob... at (no spam) mixmaster.it> wrote:
[about the ] preps of CH2N2. [Diazomethane]
Diazomethane is known to be a potential explosive.
You do not have the legitimacy to purchase diazomethane,
like I do.
Purchase bulk guncotton. Melt it down with acetone.
Now you have an explosiev -- STUPID+
nicovarse, tell us some more details about how you
do ** "Melt down" ** your "bulk guncotton"... if you
have "the legitimacy" to know what you are talking
about... ahaha... AHAHAHA.... AHAHAHAHA...
Quote:
You are also the same brains who cranked himself in
http://groups.google.com/group/alt.global-warming/msg/77965c678981994b?hl=en
over some posting of little green idiot, Roger Coppock
whom you criminally threatened by you posting:
:: nicovar:: [Roger] IF YOU DON"T STOP POSTING
:: nicovar:: RUBBISH, I WILL PERSONALLY KILL YOU.
Quote:
nicovar, your advice is, like you say, "STUPID+", but
your behavior is understandable, since on May 14
http://groups.google.com/group/alt.drugs.chemistry/msg/0a5f6e9e409c219d
you asked the dealer "prescriptionstimulants2" [PS2]
http://groups.google.com/group/alt.drugs.chemistry/msg/36a253ee36ed7b60
:: nicovar:: I sent you email but you, [PS2],
:: nicovar:: did not reply. Should I try again?
Quote:
So, you saw the word "Diazomethane", and you hoped
that it was something to get high on, didn't you?..ahahaha...
Quote:
Then you got mad & desperate because even dealer [PS2]
didn't want to have anything to do with you, a " STUPID+".
Quote:
AHAHAHA... The "Man" is watching you, dude!... ahaha...
But thanks for the laughs... ahahaha... ahahahanson |
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| hanson... |
| Posted: Fri Jun 06, 2008 12:47 pm |
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Thomas Elifritz aka "kT" <cosmic at (no spam) lifeform.org> wrote in message
news:sV42k.4078$EC5.1459 at (no spam) newsfe02.lga...
Quote:
hanson wrote:
== ahahaha... AHAHAHAHA... ahahaha ==
nicovarse aka <nicovar at (no spam) hushmail.com> wrote in message
news:b3d1ccf2-c677-472f-a291-523deee11468 at (no spam) i36g2000prf.googlegroups.com...
George Orwell <nob... at (no spam) mixmaster.it> wrote:
[about the ] preps of CH2N2. [Diazomethane]
nicovarse wrote:
Diazomethane is known to be a potential explosive.
You do not have the legitimacy to purchase diazomethane,
like I do.
Purchase bulk guncotton. Melt it down with acetone.
Now you have an explosiev -- STUPID+
hanson wrote:
nicovarse, tell us some more details about how you
do ** "Melt down" ** your "bulk guncotton"... if you
have "the legitimacy" to know what you are talking
about... ahaha... AHAHAHA.... AHAHAHAHA...
You are also the same brains who cranked himself in
http://groups.google.com/group/alt.global-warming/msg/77965c678981994b?hl=en
over some posting of little green idiot, Roger Coppock
whom you criminally threatened by you posting:
:: nicovar:: [Roger] IF YOU DON"T STOP POSTING
:: nicovar:: RUBBISH, I WILL PERSONALLY KILL YOU.
nicovar, your advice is, like you say, "STUPID+", but
your behavior is understandable, since on May 14
http://groups.google.com/group/alt.drugs.chemistry/msg/0a5f6e9e409c219d
you asked the dealer "prescriptionstimulants2" [PS2]
http://groups.google.com/group/alt.drugs.chemistry/msg/36a253ee36ed7b60
:: nicovar:: I sent you email but you, [PS2],
:: nicovar:: did not reply. Should I try again?
So, you saw the word "Diazomethane", and you hoped
that it was something to get high on, didn't you?..ahahaha...
Then you got mad & desperate because even dealer [PS2]
didn't want to have anything to do with you, a " STUPID+".
AHAHAHA... The "Man" is watching you, dude!... ahaha...
But thanks for the laughs... ahahaha... ahahahanson
"kT" <cosmic at (no spam) lifeform.org> wrote
This one is even funnier :
http://groups.google.com/group/alt.drugs.chemistry/msg/8ad957233ae285cd?hl=en
Quoting nicovar at (no spam) hushmail.com (posting on Google Groups from Shaw Cable)
"This might take a monthor more, buty that is no big deal. Back in th
1950s some of us would manufacture MDA from piperonal and nitroethane
by mixing the reactants in stoichiometric quantities. We would argue
about the appropriate catalysts. We would set the sealed reaction
mixture aside in some secure location for a month or so. Some of us
would scale this up to a 55 gallon drum reaction size. I came up with
a highly sophisticated organic reaction proceedure exploiting
principles of chemical engineering that brough the reaction time down
to a matter oh hours. All this work was unpublished, of course. It
turned out that my sophistication was surpefluous except in the
extreme case when the cost of rent became an important economic
consideration."
"kT" <cosmic at (no spam) lifeform.org> wrote
Considering the multiple documented and reported death threats, I would
have to imagine that old Nickolas' cover is completely blown by now.
hanson wrote:
ahahaha... AHAHAHAHA... Yes, poster "nicovarse" indeed
produced seminal knowledge here... even if that sorry pauper
didn't make any money in/off his illicit/criminal Methlab enterprise.
Quote:
.... In his "sophistication", Nickolas, the Meth-lab cooker, may
have fallen into his 55 gallon drum, head first, where he did
consume all the yield, and remained there "in some secure
location for a month or so." ... ahahahaha... in a state where
he contemplated the "organic synthesis from Rhodium" and
where he did "pray for mana from heathen" .... which he has
acknowledged & stated in his link that you dug up... ahahahaha....
Thanks for the laughs, Thomas... ahahaha... ahahahanson |
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| hanson... |
| Posted: Fri Jun 06, 2008 12:47 pm |
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=== ahahahaha... The plot thickens! ... ahahaha ===
Quote:
"Earl Evleth" <evleth at (no spam) wanadoo.fr> wrote in message
news:C46EB2AB.128C54%evleth at (no spam) wanadoo.fr...
Quote:
"hanson" <hanson at (no spam) quick.net> CITED
in 7t42k.21814$jX.19228 at (no spam) trnddc04,
"nicovarse" aka <nicovar at (no spam) hushmail.com> who wrote to
George Orwell <nob... at (no spam) mixmaster.it>in message
news:b3d1ccf2-c677-472f-a291-523deee11468 at (no spam) i36g2000prf.googlegroups.com...
Diazomethane is known to be a potential explosive.
You do not have the legitimacy to purchase diazomethane,
like I, ["nicovarse"] do.
Quote:
"Earl Evleth" <evleth at (no spam) wanadoo.fr> wrote
You can not purchase it. It is not for sale. The chemicals
for making it are for sale.
It can not be purchased, it is prepared freshly in the lab,
usually in solution, and used immediately in a reaction.
http://en.wikipedia.org/wiki/Diazomethane
It is so finicky that in contact with ground glass surface will
decompose it. So if handled in the gas phase, the system must
have teflon stopcocks. it is also light sensitive.
It is interesting chemically since on photolysis it gives
CH2 + N2. The CH2 will "insert" in many bonds so, for instance
CH4 + CH2 => CH3-CH3.
From the standpoint of interstellar chemistry, methane
is decomposed in the deep UV to give CH2 + H2, the CH2
can then reaction with methane to give ethane. In this
scheme the photochemistry on a methane rich planet will
eventually give the higher hydrocarbons. Oxygenated and
nitrogenated compounds can arise from the photodecomposition
of water and ammonia and/or their reaction with CH2
Finally diazomethane is not a practical explosive for terrorists.
ahahahaha.... First, don't attribute poster "nicovarse's"
bullshit to me. I corrected and stated it properly above.
Quote:
Secondly, whenever you see a poster who rushes off
the bat straight to wickipedia, like you just did, he is
suspect... big time... ahahaha...
Quote:
Thirdly, your song about interstellar chemistry and
citing the synthesis of making higher/longer aliphatics
with the need of CH2N2 to do so, is ..."Far out, dude"
ahahaha...
Quote:
Finally, back in your own French Meth-Lab things are,
of course, not going too well because if according to you
the CH2 "inserts" itself into many bonds, then it would
stand to reason that CH2 would grab, upon formation,
its own like neighbor first, polymerize and produce
polyethylene... which is why you get only the baggies
in your Meth-lab instead of the stuff within'em, the goodies
that poster "nicovarse" is so desperately after.... ahahaha...
Quote:
Listen, Earl, are you the apprentice of/in "nicovarse's"
Meth-lab?... Or are *you* the owner and you try to teach
or sell him something here?... Either way... ahahaha...
Thanks for the laughs you two ...misty che-mists...
ahahaha... ahahanson |
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| hanson... |
| Posted: Fri Jun 06, 2008 1:50 pm |
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"hanson" <hanson at (no spam) quick.net> wrote in message
news:IKe2k.1954$MF3.951 at (no spam) trnddc06...
Quote:
Thomas Elifritz aka "kT" <cosmic at (no spam) lifeform.org> wrote in message
news:sV42k.4078$EC5.1459 at (no spam) newsfe02.lga...
hanson wrote:
http://groups.google.com/group/sci.chem/msg/eccb67a80588bc89?hl=en
Thomas let me add to this tragic, but very funny thread a
serious note. In his post, which you dug up, Methlab cooker
"nicovar at hushmail.com" als said
::nicvar:: "Back in the 1950s some of us would manufacture MDA"...
Quote:
So, say "nico" was 20 then, and now 50 years later he is in
his 70's... ahahahaha...and his posts do glaringly show
what his drug habit has done to him.... ahahahaha....
It is funny, but I know is really sad... It is a horrible one-way
street that many/most of the dopers & lodos do travel down.
Quote:
During my high school vacations I worked an R&D lab
(washing glass ware etc) where they developed and tested
legit pharmaceuticals (like Nico mentions). --- I saw what
devastating effect these chemicals had on the test subjects.
Quote:
The horror of that never left my mind --- Years later when
working with/in congress I urged the law makers to start
a program to put a fucked up drug-victim into every class
from high school thru freshman... as a deterrent example.
Quote:
The proposal was studied, tried and shown on a few TV
programs and then found to be too "cruel and unusual"...
to be legislated. They never told me to/for whom it was
"cruel and unusual"... Well... such is the world....
Quote:
There is, of course, far more money to be made, for
everybody in the game, the way they do it now:....
A huge gun-toting and corrupt bureaucracy which feeds
off the unfortunate young, fucked-up kids.
...... So much institutionalized compassion.
Take care, Thomas,
hanson |
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| Bruce Sinclair... |
| Posted: Sun Jun 08, 2008 6:01 pm |
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In article <fb65b612-4c48-401f-83d6-78bd23012646 at (no spam) r37g2000prm.googlegroups.com>, Madalch <tressure at (no spam) gmail.com> wrote:
Quote: On Jun 5, 7:06=A0pm, nico... at (no spam) hushmail.com wrote:
Diazomethane is known to be a potential explosive. You risk your life
and the lives of your loved ones by your stupidity. You seem to have
the ability to research. Do you have the ability to think?
Yes, it's explosive, but it's relatively safe to make and use in
situ. Many chemists do it quite often, and I don't think we all
deserve to be dismissed as "STUPID+" for doing so.
Quite so. The only one shown as stupid in this thread is the poster that
thought making it was stupid.  |
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