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Removing the oxide layer from lithium metal
Storing Li under oil is definitely not the ideal option - not least because it tends to float on mos ... |
18-8-2012 at 05:26
by: ziqquratu |
Using oil in a mercury diffusion high vac pump
I had considered the temperature might be a factor - although I admit I expected I'd have to lower i ... |
6-8-2012 at 03:24
by: ziqquratu |
Using oil in a mercury diffusion high vac pump
Hi everyone,
I recently scored an old all-glass mercury diffusion pump for our lab, which is in g ... |
2-8-2012 at 20:23
by: ziqquratu |
Vacuum Distillation of SOCl2 (thionyl chloride)
I think regular flexible PVC tubing is somewhat more resistant to acids (for a time) than is tygon, ... |
20-6-2012 at 19:05
by: ziqquratu |
DIY lyophilizer?
We made one that I think worked OK. All a lyophiliser requires is, as you suggest, a sealed containe ... |
16-5-2012 at 01:02
by: ziqquratu |
How often do you really use IUPAC nomenclature?
[rquote=244093&tid=19604&author=arsphenamine]The essence of Science is a truthful, accurate, ... |
8-4-2012 at 17:30
by: ziqquratu |
Tropinone
The synthesis of tropinone is pretty much as simple as it gets... it basically involves stirring met ... |
18-2-2012 at 01:39
by: ziqquratu |
Repairing star cracks
Like watson says - find a glassblower. Anyone with any type of skill can fix them, it's just the ann ... |
23-1-2012 at 20:16
by: ziqquratu |
how does the ring form??
Anders - no way that type of tautomerisation is going to occur. Those electrons are going to stay ve ... |
12-12-2011 at 18:17
by: ziqquratu |
how does the ring form??
For acylations, typically using acid chlorides or anhydrides, you need a base to mop up the acid for ... |
9-12-2011 at 21:13
by: ziqquratu |
how does the ring form??
It's basically a nucleophilic acyl substitution reaction (Wikipedia has the mechanism).
The alcoh ... |
9-12-2011 at 19:51
by: ziqquratu |
Why do amines have such low pKa?
Short answer - you're not comparing the right species here - the pKa of 38 for ammonia refers to dep ... |
26-11-2011 at 22:01
by: ziqquratu |
Diels-Alder Reaction THEN Intramolecular Reaction
The NMR is proof enough - for the expected product, with the free alcohol and intact anhydride, the ... |
23-11-2011 at 01:19
by: ziqquratu |
Selectivity in ester transformation
It should be pretty easy... I would just stir with K2CO3 in MeOH. The methyl ester that you want to ... |
14-11-2011 at 01:39
by: ziqquratu |
Oxygen Sensor for Glove Box or Other use?
Simplest oxygen detector I've seen in a glove box is an incandescent light bulb. Heat the bulb caref ... |
31-10-2011 at 22:35
by: ziqquratu |
Methods of cooling?
Dewars are cheap - as long as you buy them in the form of a Thermos flask or similar.
As mentione ... |
4-9-2011 at 19:37
by: ziqquratu |
dry vacuum column chromatography
@smuv - The technique as described in the paper actually varies from a simple plug, and I've tried i ... |
4-9-2011 at 19:33
by: ziqquratu |
Solvent Pot Problems
We have this problem a bit, too. Fledarmus is correct, though - too much water results in coating th ... |
12-8-2011 at 21:33
by: ziqquratu |
Laboratory Tips and Tricks
DJF90, the idea of shining UV light on the tubes directly will rarely work - when we run TLC, the fl ... |
21-6-2011 at 20:04
by: ziqquratu |
Copper (II) Trifluoroacetate
Your best bet might be to redissolve it in a minimal amount of water then precipitate it with a solv ... |
6-6-2011 at 17:55
by: ziqquratu |
Solvent Tables
There's also a flash-based version of that nomograph on Aldrich's website
http://www.sigmaaldrich ... |
29-5-2011 at 03:11
by: ziqquratu |
HPLC peaks separation!!!
Like Nicodem and chemoleo have said, trying a different stationary phase might be your best bet. A C ... |
14-5-2011 at 21:21
by: ziqquratu |
NaOH in the eyes
First off, as far as seeking medical advice about something like this - if they were my eyes, I woul ... |
10-5-2011 at 16:44
by: ziqquratu |
Compressor cooling for the home lab
You don't want to use polystyrene insulation with acetone... it'll dissolve when you (inevitably) sp ... |
28-4-2011 at 17:15
by: ziqquratu |
Distillation of essential oils
I remember seeing a site some time ago, where a guy turned an old 44 gal drum into a giant steam dis ... |
22-1-2011 at 15:55
by: ziqquratu |
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