HMTD master - 21-4-2003 at 22:29
I was looking through my wonderful chemical closet, and I have got all the ingredients to make DNPA (DNPA is the acronym for 4,4-dinitropimelic acid,
another name is 4,4-dinitro-1,7-heptanedioic acid) does anyone have any experiance with this compound? any help/suggestions are welcomed.
all I could find about it was http://roguesci.org/megalomania/explo/DNPA.html but I hav heard of it in other places.
Bryan
Krypton - 22-4-2003 at 02:50
It`s a wonderful waste preparing DNPA
by this method over many steps with the
mono-potassium salt of trinitroethanol !!!
fluffy bunny - 22-4-2003 at 18:11
Sorry this post isn't very helpful, i don't know anything about the synthesis of DNPA, but how did you find potassium dinitroethanol?
potassium dinitroethanol
HMTD master - 23-4-2003 at 00:30
It's in a very old looking bottle
I think it came from my old school labs (along with half my pyrex) That probalbly doesn't help.
Madog - 23-4-2003 at 08:30
lol
that must be tough to make. doesnt ethyl nitrate decompose from water or something like that?
Krypton - 23-4-2003 at 12:44
Potassium dinitroethanol, the potassium salt
(NO2)2=CK-CH2-OH
of trinitroethanol
(NO2)3C-CH2-OH
I think there is something sloping between the electron
bonds (NO2) of the formula and the drawing !?!
http://roguesci.org/megalomania/explo/DNPA.gif
[ -C- --- NO2 <<< NO2 ] ; C7H10N2O8 ?
---> C7H12N2O8
appendix to my last post
Krypton - 1-6-2003 at 12:47
This is actually not the right product 
to the post but a tetranitrate of
ethanol can exist.
1-nitroxy-2,2,2-trinitroethane
(NO2)3C-CH2-ONO2
or a synthesis with p-dioxane to
4,4-dinitropimelyl chloride
[C10H12N4O12]
I think you should deactivating the
vbs scrips in the browser when
visiting roguesci.org 
PHILOU Zrealone - 5-6-2003 at 14:18
Why bother with DNPA when you have DNEthanol?
K DNEthanol --> trinitropyridine N-oxyde by a complexe trimerisation reaction.
(O2N)2CH-CH2OH has two (three in reality) acidic protons!
The H of the C is in equilibrium with the HO-N(O)=C aciform.And against all thinking the H of the alcohol has an increased acidity because of the two
strong elecron withdrawing nitrogroups in alfa position to the -OH!
If we think intelligently to the problem:
(O2N)2CH-CH2OH + CH2=O --> HOCH2-C(NO2)2-CH2OH
Formol addition to the H of a primary carbon holding a nitro (or more).
We thus have 2,2 dinitropropandiol what allow one to make the extremely powerful and dense O2NO-CH2-C(NO2)2-CH2-ONO2 (maybe cristalline) and
displaying a positive OB --> plasticiser or additive superfuel possible!
(O2N-)2C(-CH2OH)2 + 2HCl + ZnCl2 --> (O2N-)2C(-CH2Cl)2 + 2H2O
(Gringnard reagents offer a lot of ways to DNPA but there are other ways)
(O2N-)2C(-CH2Cl)2 +2NaCN --> (O2N-)2C(-CH2-CN)2 + 2 NaCl
(O2N-)2C(-CH2-CN)2 +H2O/H(+)/heat --> (O2N-)2C(-CH2-CO2NH4)2 (dinitropentandioique acid!)
(O2N-)2C(-CH2-Cl)2 + 2Me-O-CO-CH2-CO-OMe -MeONa-> (O2N-)2C(-CH2-CH2-CO2H)2 + 4MeOH + 2CO2 + 2NaCl.+ (O2N-)2C(-CH2-CH2-)2CH-CO2H (as a side product)
Dimetlyl malonic ester synthesis makes wonders!