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Microtek
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I have tried tackling the problem of reliable sensitivity tests myself. I experimented with vertical impacts at first, but in the end I settled on
oblique pendulum hammer impacts on a sample placed on a strip of sand paper on a steel plate. Then I experiment with release heights to find where at
least 3 out of five attempts give detectable decomposition (by sound, sight or smell).
My reasoning for this test method was that, in ordinary handling, a primary will only rarely be exposed to accidental impacts that are powerful enough
to set it off. So, the foremost safety concern is probably when the primary is exposed to grinding or shearing actions, hence the oblique impact on
sand paper.
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MineMan
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Someone reported an extraordinarily powerful primary. It’s the combination of ammonium dinitramide and decaborane.
Can anyone experiment or replace with ammonium perchlorate? I can’t find a source for decaborane
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EF2000
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Decaborane is available on Chemcraft: https://chemcraft.su/product/24824
But I doubt it's practical. Even if dinitramide can be substituted with perchlorate, decaborane is still volatile, highly flammable, toxic and
astronomically expensive.
Though, if someone is brave enough, synthesis is not so hard: Decaborane(14)
Attachment: decaborane14.pdf (1009kB)
This file has been downloaded 80 times
Wroom wroom
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Nemo_Tenetur
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Synthesis failed
Quote: Originally posted by dettoo456  | Anyone had experience with Silver 5-ATz complexes such as [(2Ag)5-ATz] NO3 or ClO4? The perchlorate is mentioned in engager’s tetrazole write up and
a patent but there doesn’t seem to be much discussion on it. I tried to make the nitrate the other day according to klapotke’s procedure (https://pubmed.ncbi.nlm.nih.gov/19105192/) but it didn’t seem to yield anything that great. To start, 5-ATZ doesn’t dissolve that great in
conc (anything higher than azeo %) Nitric Acid, and if you add too much water, the complexation time with AgNO3 can be ruined by just dumping out the
Silver salt of 5-ATz. Too high conc of acid will form the 5-ATz nitrate salt instead which has low solubility as well and hinders complexation as
well.
My product crashed out of the sol immediately on addition of AgNO3 to the 5-ATz/HNO3 mix as an off-white precipitate that started to yellow to a
pastel yellow on air drying on a filter.
The product is supposed to detonate on flame contact and indirectly at 298C. For me, it does crackle faintly but I can’t seem to get it to dry. I
would wager it’s like AgNTz in that it is a pain to detonate when wet but really goes when dry, but I can’t get this complex to dry to see
anything amazing.
This salt could be a great alternative to LA, nitrotetrazoles, and such since it’s so seemingly easy to prepare, but I can’t get make it to match
klapotke’s results. -My HNO3 and AgNO3 are pure and my 5-ATz is decently pure so idk. |
This week I tried the nitrate salt, with similar results. I´ve used 65 % reagent grade nitric acid (I guess close to azeotropic is what they mean
with "concentrated", otherwise they state "fuming" which is close to 100 %) and had also problems to dissolve the 5-ATZ. A warm water bath helped me
to dissolve it.
Then I added the AgNO3 solution dropwise. Each drop changed immediately into a cheese-like white consistency after contact with the acidic 5-ATZ
solution, but redissolved after some swirling. After several drops added, the solution remains turbid and it was no longer possible to redissolve it
even with prolonged swirling.
After complete addition of the silver nitrate solution the whole reaction was dense white, like yoghurt. Here is a clear difference to the cited
reference (Klapötke et al), they state that after addition of water the reaction mixture becomes turbid and some precipitate was formed.
I´ve also added some water, but it was impossible for me to see if the additional water produced additional precipitate.
After standing over-night I´ve filtered the precipitate, washed three times with distilled H20, then three times with IPA and let it dry over-night.
In contrast to your result, my product remains pure white with a flour-like consistency, but the behaviour against flame seems to be the same. No ddt,
just a flash (not really impressive). See attached video.
So I would like to know what was wrong if you, microtek and I were unable to repeat the deceptive easy preparation.
And BTW my yield was much lower than cited (from 2,5 gram silver nitrate more than 4,2 gram was expected, but I got only 2,6 gram - something really
went wrong).
Attachment: Disilver-5-aminotetrazole nitrate.mp4 (732kB)
This file has been downloaded 78 times
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dettoo456
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I’d attribute the yellow color I got from pure lazy experimental methods - I just had all of the starting materials lying around so I thought I’d
prep the complex in <15min. I didn’t even measure yield. Besides that though, the product SHOULD detonate on flame contact, albeit weaker than
AgNTz or Pb(N3)2. Mine was only able to detonate after drying fully (sitting out at room temp for a couple of days).
It had trouble combusting in contact with a fuse though, in contrast to the more standard primaries like AgNTz.
If you’re paranoid about temperature stability (or friction and shock at that), I’d recommend the complex for cap designs but besides that,
standard AgNTz or DBX-1 seems to be, ironically, easier to handle.
I’ll try to report stability results in the future with samples though.
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Nemo_Tenetur
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Well, Klapötke mentioned a possible explanation:
However, it must be noticed that the crystalline state of the sample is of extreme importance when testing the sensitivity of energetic compounds,
i.e., crystalline compounds tend to show higher sensitivities to impact and friction.
This could be an explanation for the weak response of my amorphous flour-like sample to flame, but not for immediate precipitation after dropwise
addition of the silver nitrate to the acidic 5-ATZ solution.
The experimental parameters are well defined.
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Etanol
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| Quote: Originally posted by Nemo_Tenetur |
This could be an explanation for the weak response of my amorphous flour-like sample to flame, but not for immediate precipitation after dropwise
addition of the silver nitrate to the acidic 5-ATZ solution.
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No. The crystalline state affects mechanical sensitivity, but has little effect on DDT.
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Etanol
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| Quote: Originally posted by MineMan |
Those sensitivities are impressive. The copper version of NAP is 2J impact but 20N friction if I remember. I regard friction as more important. There
are primaries that are immune to friction. This does look like a complex snyth tho. Wish the friction was less sensitive |
Excuse me, what is NAP? Nickel aminotetrazole perchlorate?
upd
O, I find, Nickel aminoguanidine diperchlorate
[Edited on 7-3-2024 by Etanol]
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ManyInterests
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I wasn't sure where else to put this, so I am asking here.
I made some more NHN yesterday. Using 130ml of 95% (closer to 96%) ethanol, 43.5g of hydrazine sulfate, and 26.6g sodium hydroxide. The only
difference is I was using bought nickel nitrate and not made. I dissolved 63g of nickel nitrate in 150ml of water with 0.005% dextrin by weight of the
NN. The temperature did rise over 70C a few times which caused me concern.
I put in around 50ml of the solution, or a little less. But it was an excess. Everything appeared to run smoothly. My vacuum pump had issues so it
was effectively gravity filtered. As I washed out the excess nickel nitrate with copious amounts of warm water and around 350ml of 95% ethanol.
The color is mostly OK. But there is that little tinge in it that bothers me. It is drying as of now, but I am wondering if it is something I should
be concerned about.
I never saw any information on recrystalizing NHN. But I did hear that ammonia (I have 27% ammonia) works as a solvent. Would it dissolve it and
simply be able to crash out the impurities? If they are impurities that is.
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Microtek
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I don't know how labile the hydrazine ligands are, but I would expect at least some of them to be replaced with the rather similar ammonia ligands if
you try treating the NHN as a simple salt. Ammonia is more volatile than hydrazine, so maybe you could evaporate it off to reform the hydrazine
complex, but I don't think it likely.
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ManyInterests
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Well it probably wasn't something major since the NHN appears to be of good quality.
But there is one major problem: I was expecting at least 12g of yield based on all the previous attempts I made. But I only got 4! I am legit baffled
as to what happened.
My estimates that is I did not freebase enough hydrazine from my hydrazine sulfate, and the heating went out of control for a bit. The other thing is
that my nickel nitrate solution was too concentrated. I diluted what I had to resemble more of what people showed when they used it (it is still quite
dark green).
I am going to try again with similar quantities but I will take more care with heating on my mantle to not allow it to rise above 63 or 65c. My new
mantle is very powerful, but a little finicky.
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Nemo_Tenetur
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Was the filtrate almost colorless (a very weak blue) or turquoise to green? From my experience, concentrated nickel nitrate solution doesn´t hurt the
yield, but I´ve always performed the synthesis with commercially hydrazine hydrate solution.
Commercially available nickel nitrate is almost always the hexahydate, because it is VERY hard to get the anhydrous salt. Did you respect this within
your yield calculation?
And, by the way, the use of dextrin is pretty useless IMHO. I know the patent which claim a higher density, but I can´t confirm this. From my
experience - dozens batches - the highest bulk density is obtained with concentrated solutions. I always use a few percent hydrazine excess to ensure
complete consumption of the nickel and to avoid an incomplete complexation.
I´ve seen a paper with an NHN accident ("spontaneous explosion of a normally stable complex salt" by Herbert Ellern an Donald E. Olander ) where an
incomplete complexation lead to an unstable product with self-deflagration even when moist!
Just for your information that even with such a "safe" primary shit can happen.
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ManyInterests
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| Quote: Originally posted by Nemo_Tenetur | Was the filtrate almost colorless (a very weak blue) or turquoise to green? From my experience, concentrated nickel nitrate solution doesn´t hurt the
yield, but I´ve always performed the synthesis with commercially hydrazine hydrate solution.
Commercially available nickel nitrate is almost always the hexahydate, because it is VERY hard to get the anhydrous salt. Did you respect this within
your yield calculation?
And, by the way, the use of dextrin is pretty useless IMHO. I know the patent which claim a higher density, but I can´t confirm this. From my
experience - dozens batches - the highest bulk density is obtained with concentrated solutions. I always use a few percent hydrazine excess to ensure
complete consumption of the nickel and to avoid an incomplete complexation.
I´ve seen a paper with an NHN accident ("spontaneous explosion of a normally stable complex salt" by Herbert Ellern an Donald E. Olander ) where an
incomplete complexation lead to an unstable product with self-deflagration even when moist!
Just for your information that even with such a "safe" primary shit can happen. |
I am aware that danger can happen. this is why I treat all energetics with the utmost respect.
I've bumped up another thread about this for further discussion. I am not happy with what is going on.
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EF2000
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| Quote: Originally posted by Nemo_Tenetur | I always use a few percent hydrazine excess to ensure complete consumption of the nickel and to avoid an incomplete complexation.
I´ve seen a paper with an NHN accident ("spontaneous explosion of a normally stable complex salt" by Herbert Ellern an Donald E. Olander ) where an
incomplete complexation lead to an unstable product with self-deflagration even when moist!
Just for your information that even with such a "safe" primary shit can happen. |
Mentioned paper (doi: 10.1021/ed032p24) says that in another, more serious accident hydrazine hydrate was used in 5% excess. And that hydrazine occluded in product's
crystal, higher complexation, or contamination by combustible organics are possible causes of spontaneous explosion. Meaning that both excess and
deficiency of hydrazine can be dangerous.
Conclusion: Hydrazine is generally unpleasant compound.
Attachment: ellern1955.pdf (1MB)
This file has been downloaded 27 times
Wroom wroom
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Laboratory of Liptakov
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When I reading last problems about hydrazine, respectively about NHN, maybe will better focusing on SA-DS. Yes, sensitivity is higher and is it full
primary, but preparation is very easy and results are constant. I know, this mention is out of thread.....
Development of primarily - secondary substances CHP (2015) Lithex (2022) Brightelite (2023) Nitrocelite (2024)
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ManyInterests
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| Quote: Originally posted by Laboratory of Liptakov | | When I reading last problems about hydrazine, respectively about NHN, maybe will better focusing on SA-DS. Yes, sensitivity is higher and is it full
primary, but preparation is very easy and results are constant. I know, this mention is out of thread..... |
I made successful NHN several times before. I think what happened wrong is that I didn't freebase it correctly. It was simply too cold to freebase
(all reagents were stored in a fridge for days to cool). I was not aware that it wouldn't freebase or react if it is too cold.
All previous successful times I did it at room temperature but simply kept everything cooler in an ice bath.
Remember LL, this is the first time I ran into issues with NHN synthesis! :p
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Nemo_Tenetur
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I had only one failure with NHN. This batch was of very low bulk densitiy, difficult to dry and hard to ignite. The color was more like pale pink,
precipitated in high dilution.
Then I switched back to concentrated solutions and everything was fine again. In general, I think it´s good primary. But you require several hundred
milligram and some containment for reliable DDT. Such a quantity produce alot of nickel dust, this isn´t the healthiest thing.
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ManyInterests
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| Quote: Originally posted by Nemo_Tenetur | I had only one failure with NHN. This batch was of very low bulk densitiy, difficult to dry and hard to ignite. The color was more like pale pink,
precipitated in high dilution.
Then I switched back to concentrated solutions and everything was fine again. In general, I think it´s good primary. But you require several hundred
milligram and some containment for reliable DDT. Such a quantity produce alot of nickel dust, this isn´t the healthiest thing.
|
That is true. But with an ETN mixed in at a 1:1 ratio or with other mixtures it can be an extremely powerful initiating agent. NHN has been in use in
commercial detonators for decades now. It isn't an unproven new thing.
I've made a lot of progress with using NHN detonators and I plan on continuing with them.
For LL. I wish to inform him that CHP and LL8 are on the table. 
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Etanol
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Electrostatic discharge?
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Etanol
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| Quote: Originally posted by Nemo_Tenetur | | Quote: Originally posted by dettoo456 | Anyone had experience with Silver 5-ATz complexes such as [(2Ag)5-ATz] NO3 or ClO4? The perchlorate is mentioned in engager’s tetrazole write up and
a patent but there doesn’t seem to be much discussion on it. I tried to make the nitrate the other day according to klapotke’s procedure (https://pubmed.ncbi.nlm.nih.gov/19105192/) but it didn’t seem to yield anything that great. To start, 5-ATZ doesn’t dissolve that great in
conc (anything higher than azeo %) Nitric Acid, and if you add too much water, the complexation time with AgNO3 can be ruined by just dumping out the
Silver salt of 5-ATz. Too high conc of acid will form the 5-ATz nitrate salt instead which has low solubility as well and hinders complexation as
well.
My product crashed out of the sol immediately on addition of AgNO3 to the 5-ATz/HNO3 mix as an off-white precipitate that started to yellow to a
pastel yellow on air drying on a filter.
The product is supposed to detonate on flame contact and indirectly at 298C. For me, it does crackle faintly but I can’t seem to get it to dry. I
would wager it’s like AgNTz in that it is a pain to detonate when wet but really goes when dry, but I can’t get this complex to dry to see
anything amazing.
This salt could be a great alternative to LA, nitrotetrazoles, and such since it’s so seemingly easy to prepare, but I can’t get make it to match
klapotke’s results. -My HNO3 and AgNO3 are pure and my 5-ATz is decently pure so idk. |
This week I tried the nitrate salt, with similar results. I´ve used 65 % reagent grade nitric acid (I guess close to azeotropic is what they mean
with "concentrated", otherwise they state "fuming" which is close to 100 %) and had also problems to dissolve the 5-ATZ. A warm water bath helped me
to dissolve it.
Then I added the AgNO3 solution dropwise. Each drop changed immediately into a cheese-like white consistency after contact with the acidic 5-ATZ
solution, but redissolved after some swirling. After several drops added, the solution remains turbid and it was no longer possible to redissolve it
even with prolonged swirling.
After complete addition of the silver nitrate solution the whole reaction was dense white, like yoghurt. Here is a clear difference to the cited
reference (Klapötke et al), they state that after addition of water the reaction mixture becomes turbid and some precipitate was formed.
I´ve also added some water, but it was impossible for me to see if the additional water produced additional precipitate.
After standing over-night I´ve filtered the precipitate, washed three times with distilled H20, then three times with IPA and let it dry over-night.
In contrast to your result, my product remains pure white with a flour-like consistency, but the behaviour against flame seems to be the same. No ddt,
just a flash (not really impressive). See attached video.
So I would like to know what was wrong if you, microtek and I were unable to repeat the deceptive easy preparation.
And BTW my yield was much lower than cited (from 2,5 gram silver nitrate more than 4,2 gram was expected, but I got only 2,6 gram - something really
went wrong).
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Try to change mixing method ATz and AgNO3:
add ATz to AgNO3, not AgNO3 to ATz.
Try don't add HNO3.
Add 5mmol hot ATZ solution into 10mmol solution of AgNO3, cold it.
[Edited on 13-4-2024 by Etanol]
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