4 ms·

Is there a good archive of this kinds of "not normally taught" chemistry things some where?

by seany 1y ago

bigyabai 1y ago
If you were not "normally taught" how to do this stuff then you probably shouldn't do it.
- devrandoom 1y ago
  If you weren't asked for patronising advice you probably shouldn't offer it.
  - gus_massa 1y ago
    I went to a high school with an specialization in Chemistry in Argentina. We made a lot of Chemistry experiments, like 16 hours per week. One day the other half of my class was at the lab. They were boiling some organic compound with potassium permanganate and probably sulfuric acid. The idea is that you have them in a flask, and a long refrigerated vertical tube to condense the vapors and send the liquid inside the flask again. https://en.wikipedia.org/wiki/Reflux#Reflux_in_chemical_reactions https://en.wikipedia.org/wiki/Reflux#Reflux_in_chemical_reac... They forgot to add some porcelain scrap to the flask, that is useful to get an even boiling instead of big bubbles. So they added them while it was already boiling! It boiled too fast and create a jet of hot mix that reached the ceiling that was like 3 meters (18 foots) high. Lucky nobody got hurt, but as a reminder we had a brown mark in the ceiling for a few years. Many experiments need supervision from someone that knows what they are doing.
    - devrandoom 1y ago
      > Many experiments need supervision from someone that knows what they are doing. Of course. He was neither saying or offering that though. For the record, 3 meters are more like 10ft.
- seany 1y ago
  Doing it is significantly different than asking for a repository of similar projects. Arguably this kind of gate keeping is specifically what I'm trying to step around.
thfuran 1y ago
https://www.science.org/content/blog-post/higher-states-bromine https://www.science.org/content/blog-post/higher-states-brom... And his whole series of "Things I Won't Work With"
kadoban 1y ago
Science Madness forums may be an okay place to find better references than I'd know about. If you just want to see some fun chemistry and not necessarily take it that seriously or learn to do it yourself, there's some good people on youtube. Some of my favorites are Extractions&Ire (and his sister channel), NileRed and Stryopyro. Some people in some of those communities can probably point you in the right direction for whatever you're looking for.
nkurz 1y ago
I'm not sure exactly what you are looking for, but Shakhashiri's "Chemical Demonstrations" series includes Nitrogen Triiodide among many other things: https://www.amazon.com/Chemical-Demonstrations-Handbook-Teachers-Chemistry/dp/0299088901 https://www.amazon.com/Chemical-Demonstrations-Handbook-Teac... Edit: It looks like the ScienceMadness page references the exact location: https://www.sciencemadness.org/smwiki/index.php/Nitrogen_triiodide https://www.sciencemadness.org/smwiki/index.php/Nitrogen_tri...
photochemsyn 1y ago
Since Librivox is on the front page, here's a 1910 book reading, pretty good quality, of "The Romance of Modern Chemistry" which covers NI3 (Ch 15) and many similar topics. Surprising how much chemical knowledge existed then, even without a solid understanding of QM: https://librivox.org/the-romance-of-modern-chemistry-by-james-c-philip/ https://librivox.org/the-romance-of-modern-chemistry-by-jame... An interesting feature is that if you go up the periodic table on the iodine column, the species become less reactive, with nitrogen bromide being explosive but more stable than NI3 and the fluorine derivative, NF3 being stable enough to use in industrial semiconductor applications (etching), and with the benefit of not being a persistent environmental pollutant due to relatively rapid breakdown.
- trehalose 1y ago
  NF3 is very different than the other nitrogen halides and used as a silicon etchant, but re: environmental concerns, perhaps you're confusing it with something else? It's an extremely potent greenhouse gas that persists in the atmosphere for centuries. (https://en.wikipedia.org/wiki/Nitrogen_trifluoride#Greenhouse_gas https://en.wikipedia.org/wiki/Nitrogen_trifluoride#Greenhous...) Surprisingly less toxic than some other gases used in the semiconductor industry though!

Is there a good archive of this kinds of "not normally taught" chemistry things some where?

by seany 1y ago

Is there a good archive of this kinds of "not normally taught" chemistry things some where?

bigyabai 1y ago

If you were not "normally taught" how to do this stuff then you probably shouldn't do it.

devrandoom 1y ago
If you weren't asked for patronising advice you probably shouldn't offer it.
- gus_massa 1y ago
  I went to a high school with an specialization in Chemistry in Argentina. We made a lot of Chemistry experiments, like 16 hours per week. One day the other half of my class was at the lab. They were boiling some organic compound with potassium permanganate and probably sulfuric acid. The idea is that you have them in a flask, and a long refrigerated vertical tube to condense the vapors and send the liquid inside the flask again. https://en.wikipedia.org/wiki/Reflux#Reflux_in_chemical_reactions https://en.wikipedia.org/wiki/Reflux#Reflux_in_chemical_reac... They forgot to add some porcelain scrap to the flask, that is useful to get an even boiling instead of big bubbles. So they added them while it was already boiling! It boiled too fast and create a jet of hot mix that reached the ceiling that was like 3 meters (18 foots) high. Lucky nobody got hurt, but as a reminder we had a brown mark in the ceiling for a few years. Many experiments need supervision from someone that knows what they are doing.
  - devrandoom 1y ago
    > Many experiments need supervision from someone that knows what they are doing. Of course. He was neither saying or offering that though. For the record, 3 meters are more like 10ft.
seany 1y ago
Doing it is significantly different than asking for a repository of similar projects. Arguably this kind of gate keeping is specifically what I'm trying to step around.

thfuran 1y ago

https://www.science.org/content/blog-post/higher-states-bromine https://www.science.org/content/blog-post/higher-states-brom... And his whole series of "Things I Won't Work With"

kadoban 1y ago

Science Madness forums may be an okay place to find better references than I'd know about. If you just want to see some fun chemistry and not necessarily take it that seriously or learn to do it yourself, there's some good people on youtube. Some of my favorites are Extractions&Ire (and his sister channel), NileRed and Stryopyro. Some people in some of those communities can probably point you in the right direction for whatever you're looking for.

nkurz 1y ago

I'm not sure exactly what you are looking for, but Shakhashiri's "Chemical Demonstrations" series includes Nitrogen Triiodide among many other things: https://www.amazon.com/Chemical-Demonstrations-Handbook-Teachers-Chemistry/dp/0299088901 https://www.amazon.com/Chemical-Demonstrations-Handbook-Teac... Edit: It looks like the ScienceMadness page references the exact location: https://www.sciencemadness.org/smwiki/index.php/Nitrogen_triiodide https://www.sciencemadness.org/smwiki/index.php/Nitrogen_tri...

photochemsyn 1y ago

Since Librivox is on the front page, here's a 1910 book reading, pretty good quality, of "The Romance of Modern Chemistry" which covers NI3 (Ch 15) and many similar topics. Surprising how much chemical knowledge existed then, even without a solid understanding of QM: https://librivox.org/the-romance-of-modern-chemistry-by-james-c-philip/ https://librivox.org/the-romance-of-modern-chemistry-by-jame... An interesting feature is that if you go up the periodic table on the iodine column, the species become less reactive, with nitrogen bromide being explosive but more stable than NI3 and the fluorine derivative, NF3 being stable enough to use in industrial semiconductor applications (etching), and with the benefit of not being a persistent environmental pollutant due to relatively rapid breakdown.

trehalose 1y ago
NF3 is very different than the other nitrogen halides and used as a silicon etchant, but re: environmental concerns, perhaps you're confusing it with something else? It's an extremely potent greenhouse gas that persists in the atmosphere for centuries. (https://en.wikipedia.org/wiki/Nitrogen_trifluoride#Greenhouse_gas https://en.wikipedia.org/wiki/Nitrogen_trifluoride#Greenhous...) Surprisingly less toxic than some other gases used in the semiconductor industry though!