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Is there any trick to get stir bars to stay centered and spin on flat bottom flasks?
In my experince they make the most annoying clicking sound too. :-) (When stirring is relatively slo ... |
27-7-2020 at 04:59
by: Pumukli |
Procedure for Coumarin - different product, what is it?
Vanilla scent? No way!
Coumarine has ummm... coumarine scent!
Don't expect vanilla scent, pure co ... |
16-7-2020 at 13:23
by: Pumukli |
How to handle powders without dusting?
Static charge is a nuissance when it comes to fine powders which are non conductive! (Well, maybe ev ... |
16-7-2020 at 03:21
by: Pumukli |
Dimethyl oxalate synthesis problems
Which recipe are you trying to follow?
There surely are synthesis descriptions for this compound an ... |
16-7-2020 at 02:53
by: Pumukli |
Problem using Chloroacetyl Chloride
" the pressure builds up and it pops my lid"
I think you have a problem in your setup!
Maybe you ... |
12-7-2020 at 22:30
by: Pumukli |
Aesthetic Aromatics: Preliminaries
Perhaps you could include 1,3,5-triacetyl-benzene, synthetized from acetone and ethyl-formate. I tri ... |
8-7-2020 at 12:44
by: Pumukli |
How is acetaldehyde even shipped?
Cannizzaro reaction? It would produce acetic acid. But Cannizzaro needs strongly basic environment.
... |
19-6-2020 at 10:37
by: Pumukli |
Diethylamine as catalyst in henry reaction?
If a primary amine can catalyse it, a strong base (NaOH) can catalyse it, even NaOAc can catalyse it ... |
18-6-2020 at 21:31
by: Pumukli |
Cyclic diester from 2,2'-oxydibenzoic acid?
Take a melting point.
Try TLC.
We are amateurs but these methods are usable even for us. |
16-6-2020 at 23:19
by: Pumukli |
Cyclic diester from 2,2'-oxydibenzoic acid?
Have you checked the price of the acid what you've just synthetized? :-)
Sigma wants a pleasant p ... |
14-6-2020 at 22:21
by: Pumukli |
Simplest "power solvent" synthesis?
Then the OP should check e.g. Limac Science and order solvents from them. They are within EU and car ... |
12-6-2020 at 04:14
by: Pumukli |
Simplest "power solvent" synthesis?
Guys, the OP is from Sweden. A very "green" country or so they speak... I doubt if he/she was able t ... |
11-6-2020 at 05:10
by: Pumukli |
Simplest "power solvent" synthesis?
Dioxane comes to mind, but it is unhealthy (carcinogene). There are synth descriptions of the compou ... |
7-6-2020 at 04:22
by: Pumukli |
Synthesis of diethyl diethylmalonate
I found an old article by Perkin, who prepared methyl-isopropyl-diethylmalonate by the reaction of i ... |
6-6-2020 at 13:59
by: Pumukli |
Synthesis of diethyl diethylmalonate
I may overlooked something, but have not seen written that there won't be any precipitate! The sodiu ... |
6-6-2020 at 11:28
by: Pumukli |
Synthesis of diethyl diethylmalonate
Has bromoethane the required reactivity for this reaction? What if you added some dry KI as a cataly ... |
6-6-2020 at 11:15
by: Pumukli |
Synthesis of diethyl diethylmalonate
Water in the malonate?
|
6-6-2020 at 09:53
by: Pumukli |
Silica gel mystery?
Congrats, Ubiya! Your work (the yellow and green liquid in those vials) is very convincing!
|
5-6-2020 at 04:15
by: Pumukli |
The Cannizzaro Reaction
Yeah, if those hindsights were just non-existent... :-)
I'm also curious about the crossed Canniz ... |
4-6-2020 at 21:51
by: Pumukli |
mononitrophenols - nitration of phenol
Hi Fery, thanks for the detailed description! I might found your preparation useful. :-)
What is ... |
4-6-2020 at 12:00
by: Pumukli |
Synthesis of benzonitrile by P2O5 dehydration of benzamide - another perplexing failure
Yeah, I tried mackolol's suggested method.
I used nicotinamide as starting amide and used ammonium- ... |
4-6-2020 at 02:00
by: Pumukli |
Model reaction uncertainties
Thanks for the ideas.
I'd prefer something more quantitative than TLC and as I have an old but work ... |
4-6-2020 at 01:26
by: Pumukli |
Synthesis of Hexamethylenetetramine (Hexamine)
Texium, it was great!
Do you know what kind of contaminant can cause the yellow (soothy) flame and ... |
2-6-2020 at 10:39
by: Pumukli |
Benzoin condensation using hydrogen cyanide?
Potassium-ferrocyanide + Sodium carbonate heated to melting and blackening on open flame for a few m ... |
31-5-2020 at 22:16
by: Pumukli |
Model reaction uncertainties
I've been thinking about monitoring and following the O-alkylation of phenols in an amateur setting. ... |
31-5-2020 at 11:41
by: Pumukli |
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