That awesome moment when I can’t decide that wich is the worse: the mercury or the cyanide? :D
Pictures from an organic chemistry laboratory
All of these pictures are taken by me, I own all rights and please write if you want to use them somewhere. Thanks!
-Kristof
If You could help me and this project with 1 USD I would be really thankful:
• Tell me Your question!
Follow @labphotographer
-Kristof
If You could help me and this project with 1 USD I would be really thankful:
• Tell me Your question!
Follow @labphotographer
A strange device from nearly a century ago used for electrophoresis… Anyone ever used something like this?
Some crude rheosmin. It hasn’t got the strong odor as it is usually described… So sad.
Hydrogenation with shaking. This is a 1000cm3 hydrogenation vessel what works with shaking. The black color is caused by the 10% Pd/C hydrogenation catalyst.
If have eaten almost 10l of hydrogen, hope that it will result some rheosmin (raspberry odor ketone).
Sodium-sulfate is one of the best drying agent for organic solvents. Here ethyl-acetate was dried with a little Na2SO4 (the solid at the bottom).
Filtering the crude product of the condensation. Just fits in the funnel, luck!
Anonymous asked: I'm actually doing the same thing in my research course- the only problem is that mine is just a light brown, with a few flakes of product in it. Do I just need to reflux the mixture longer? I suppose it doesn't help that I'm doing this on a much smaller scale than you, haha.
Hi,
Thanks for your question! I have not refluxed the mixture for even a minute, because the aldehyde will react with hot alkali forming alcohols and benzoic acids due the cannizzaro reaction. These side products could easily cause a dark color.
Reason number two is the possibly impure 4-hydroxybenzaldehyde what is also an easily oxidizable thing. I would suggest to do the reaction without reflux, simply leave it on the shelf for 2 day.
I am currently making some rheosmin (raspberry ketone) for fun. Started from 40g, hope that will end up with more than 30g(:
It looks like this, just after the aldol condensation of the 4-hydroxybenzaldehyde with acetone in presence of some sodium-hydroxide as a base. It’s a beautiful red crystalline solid.
Bromination on small scale. The recipe said that add the bromine to the alkene’s soln. in DMF and wait till the red color disappears…. They lied, this color will never fade.
