Anonymous asked: How are you able to get such amazing crystals in recrystallization. Please Give us Rookies some tips. It would be much appreciated.
Find a solvent what dissolves your compound while it’s hot and not if it’s cold. How? Do experiments on a small scale, e.g.: in a test tube.
Add some of your previously powdered substance to the right solvent and heat it up, until it is dissolved completely.
If if doesn’t dissolves your material completely, than add a bit more solvent, or heat it until it boils.
When it’s ready place it at a place where it could cool down SLOWLY! Golden rule of crystal growth is: put it on the shelf and forget about it.
3:57 am • 6 May 2013 • 6 notes
As I told, the formation of the Grignard is almost immediate after adding the halide (here bromobenzene).
The brown thing of the side of the flask is a little not yet reacted iodine.
9:30 pm • 5 May 2013 • 17 notes
Activation of magnesium with some subliming iodine. It has a really pretty color and it start’s the formation of Gringard reagent in no time!
Have You seen my portfolio? It’s over here: http://labphoto.tumblr.com/tagged/portfolio
9:30 pm • 4 May 2013 • 64 notes
The organomercury substance, just after it’s reaction with potassium iodide and elemental iodine. The C-Hg bond is broken and now I’ve got a C-I bond on my molecule and some bright red, awesome looking HgI2.
Chemistry always fascinates me, it is so awesome!
9:30 pm • 3 May 2013 • 43 notes
I am just in organomercury chemistry. This white thing has a C-Hg bond in it so extreme care should be taken while working with it. In this stage, even due it’s limited solubility it would be a deadly joke to eat some of it.
9:30 pm • 2 May 2013 • 9 notes
Just before the recrystallization of the crude product of the nitration. It is in a 6000cm3 flask and almost 3liter of methanol is needed.
Large amount chemistry is so awesome!
9:30 pm • 1 May 2013 • 29 notes
Washing the filter cake with distilled water.
Originally it had a pH -1 and at the end of washings with K2CO3 and water it has a neutral pH 7.
Sigma sells 10g of this compound for almost 100 Euro. In the funnel there is almost 500g, let’s calculate it :D
9:31 pm • 30 April 2013 • 12 notes
Filtering out the crude product of a (successful) nitration of 4-methoxy acetophenone.
The size what the recipe was made: 4 mol aromatics nitrated with 2,5l of 98% H2SO4 and lots of nitric acid.
The labcoats are wrapped on the 10L büchner flask, because if it breaks, serious problems could happen….
9:30 pm • 29 April 2013 • 8 notes
An overreacted nitration (not my reaction).
I am sorry for the kid who have to clean this up :D
9:30 pm • 28 April 2013 • 29 notes
Just a nitration with some evolving nitrogen-dioxide.
P.S.: this is my 400.-th post(:
9:30 pm • 27 April 2013 • 24 notes