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Author: Subject: 5-ATZ(5-Aminotetrazole), the nitrotetrazolate ion and friends
Etanol
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[*] posted on 22-2-2024 at 11:28


Quote: Originally posted by dettoo456  

AgNTz IS NOT COMPATIBLE WITH ALUMINUM THOUGH!


Quote: Originally posted by B(a)P  

It is interesting that you say this, I have tested this by placing a small sample into an aluminium tube for over 12 months. At the end of the test, there was no obvious mark on the metal or any noticeable change to performance. I note that because the sample was so small I was only able to do limited testing - direct flame test and indirect flame test wrapped in foil.


Quote: Originally posted by Etanol  

I read that nitrotetrazolates are reduced by Mg,Zn,Al into aminotetrazolates. I mix recrystallized AgNTZ, Al and dist water at room temperature but I did not see a sign of the reaction within 2 day. Maybe this reaction is very slow or requires impurities.


The recrystallized AgNT was stored 8 days at room temperature in a mix with distilled water and aluminum foil. During this time, a few gas bubbles formed and the sample became similar in color to the powder of metal silver. However, the dried sample worked as well as freshly prepared AgNT. The Al-foil has not changed.

On the contrary, wet magnesium reacts very quickly, in minutes, into grey-black powder.

[Edited on 22-2-2024 by Etanol]

[Edited on 22-2-2024 by Etanol]
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dettoo456
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[*] posted on 22-2-2024 at 17:28


It might indeed be fine to store with Al, I just saw that the old report I linked advised against it, citing quick decomposition.

I haven’t carried out any tests personally, so store it at your own risk.
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[*] posted on 22-2-2024 at 18:42


Quote: Originally posted by Etanol  

The recrystallized AgNT was stored 8 days at room temperature in a mix with distilled water and aluminum foil. During this time, a few gas bubbles formed and the sample became similar in color to the powder of metal silver. However, the dried sample worked as well as freshly prepared AgNT. The Al-foil has not changed.



Thank you for sharing your findings. That you had a reaction when water was involved indicates to me there is an incompatibility. So maybe it is ok to use aluminium as a cavity liner, so long as it is not stored. Seems to me though aluminium is best avoided in this application.
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[*] posted on 2-3-2024 at 00:33


A simple way to extract nitrotetrazole for NH4NT

Add 15-20%-H2SO4 into NaNT*4H2O to pH=2...1
Heat a little to completely dissolving
Add 4-5 volumes of isopropyl alcohol, shake
Wait
Solid sodium sulfate settled. Transparent yellow nitrotetrazole solution should be assembled with a pipette and neutralized by water ammonia, then dried.
What impurities can remain in the product with such an extraction?
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[*] posted on 3-3-2024 at 00:49


Why is it recommended to recrystallize BNCP from 1% HClO4, not water NH3? This is a base complex. Acid should decompose it into NH4ClO4, NH4NT, Co(NT)2OH, Co(ClO4)2OH, Co(OH)3 etc.

[Edited on 3-3-2024 by Etanol]
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[*] posted on 3-3-2024 at 09:18


The nitrotetrazole ligands are not strongly coordinated, and amines will take their place if too much base is applied. HClO4 at such low concentrations likely wouldn’t mess with the already acidic nitrotetrazole ligands.

Just speculation though; I’m not an inorganic chem wiz.
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