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Acid to aldehyde w/o hydrides?
I remeber one what which consist of making the benzonitrile with urea and sulfamic acid (GB2151626) ... |
16-7-2008 at 08:07
by: Klute |
Synthesis of 4-hydroxybenzaldehyde from phenol?
The problem to p-hydroxybenzaldehyde has been solved:
[IMG]http://img.photobucket.com/albums/v622 ... |
15-7-2008 at 06:38
by: Klute |
distilling with a hot plate
That's the word I wa looking for, thank you  |
15-7-2008 at 03:44
by: Klute |
Cleaning crude DCM (from distillation)
As mentionned in at least one other thread, and above, washing with brine, water, sat CaCl2, H2SO4 a ... |
15-7-2008 at 03:38
by: Klute |
Evil's not-so-amazing $20 OTC vacuum aspirator and recirculating station...
I guess the viscosity of the oil would pose problems with pump and all, and might no get a good pres ... |
14-7-2008 at 17:20
by: Klute |
distilling with a hot plate
Using directly the hotplate as is will be very unpractical, and very wastefull heat-wise. Even a so- ... |
14-7-2008 at 17:04
by: Klute |
Solvent Stills
I have mounted a small solvent still with my Dean Stark. It works without any problems, i am current ... |
13-7-2008 at 12:22
by: Klute |
Another Tosic acid question
Are you sure you have the anhydrous form in the first place? Anhydrous TsOH is incredebly hygroscopi ... |
13-7-2008 at 01:43
by: Klute |
Solvent Stills
Thanks for the pic! I am definitavily getting more and more jelous of you guys
can you store ... |
12-7-2008 at 15:48
by: Klute |
useing a bubbler?
He is refering to a CTH (Catalyzed Transfert Hydrogenation) I suppose, where gaseous H2 is replaced ... |
12-7-2008 at 05:42
by: Klute |
Vacuum Filtering moisture sensitive crystals
For such sensitive compounds, schlenk vac filtration technics are usually used. This consists of a d ... |
11-7-2008 at 06:31
by: Klute |
Solvent Stills
Well, at work we always used to keep these sealed schlensk for up to 1 months, some other MS or CaH2 ... |
6-7-2008 at 11:18
by: Klute |
Solvent Stills
Yes, those are the kinds of stills I mentionned I didn't want to have rather
than have one still ... |
4-7-2008 at 01:23
by: Klute |
Found on eBay
No offense, but I don't really understand the purpose of this thread? |
3-7-2008 at 12:59
by: Klute |
Finally! Povidone iodine extraction (this one works way better than Rhodiums extraction method)
There was a thread on the subject a month ago or more. UTFSE! |
3-7-2008 at 12:58
by: Klute |
Toluene based paint thinner composition
Well, your company should be able to ask for a MSDS to the distributor/manufacturor, they are compel ... |
3-7-2008 at 07:03
by: Klute |
Solvent Stills
Thank you all. I remeber those electronic time splitters when working on semi-industrial rigs (conti ... |
3-7-2008 at 06:58
by: Klute |
4-ethoxy-3-methoxybenzaldehyde from vanillin
I was referring to acetone, as this is what he used. I usually heat DMF to ~50°C when doing such al ... |
3-7-2008 at 06:17
by: Klute |
reductive amination with triacetoxyborohydride
In addition to Grind's excellent preparation, I would like to add this preparation of STAB I found r ... |
2-7-2008 at 16:59
by: Klute |
Storage of PBr5
I take it PBr3 is much less reactive/unstable than PBr5 (never used any of them)?
But in any case ... |
2-7-2008 at 16:24
by: Klute |
Ethyl/Isopropyl Bromide preparation
Methyl bromide is a gas under STP. So you cannot condenser it without using dry ice/liq. N2.
You ... |
2-7-2008 at 16:14
by: Klute |
Storage of PBr5
I think CaCl2 isn't efficient enough then, the water partial pressure is still high enough to form H ... |
2-7-2008 at 14:22
by: Klute |
constant boiling hydrobromic acid
I insulate my vigreux with light plumbing insulation. Very easy (perfect diameter), and the insulati ... |
2-7-2008 at 04:31
by: Klute |
Hydrogen Sulfide: Generation and Storage
Ok, so it was sulfur then. Thanks for poiting that out. |
2-7-2008 at 04:18
by: Klute |
Hydrogen Sulfide: Generation and Storage
No, hypochlorite will oxidize the sulfides. INto what i am not sure, surely various oxygenated sulfu ... |
2-7-2008 at 03:45
by: Klute |
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