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aga
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Doh !
And i was so close to winning ...
I suppose the fact that they're paracetemol tablets may have been discovered sooner or later.
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bismuthate
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You should try that extraction. The extractions and synths will most likely come out separate
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blogfast25
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You didn't even get your hands dirty!
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aga
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Work Smarter not Harder.
That's my motto.
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j_sum1
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Quote: Originally posted by aga  | Doh !
And i was so close to winning ...
I suppose the fact that they're paracetemol tablets may have been discovered sooner or later. |
Made
me laugh.
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The Volatile Chemist
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Nice synths. I wouldn't worry about dynamics changing too much, the basic idea (No pun intended) is pretty cool. Antimony hexacyanoferrate(II?) was
pretty cool!
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Oscilllator
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I also don't agree with the possibility of having a "longest streak" prize. My personal entry, a compound with a MW of 23000+, takes several days to
recrystallise, so of course I cannot submit it until then.
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Etaoin Shrdlu
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Quick, someone make this one.
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Oscilllator
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Afraid not. That's a polymer with n=10000. Mine is a discrete molecule, 10 points for guessing what it is!
Edit: at least one person has already
[Edited on 18-11-2014 by Oscilllator]
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Etaoin Shrdlu
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Psht, no. It's a discrete molecule with exactly 10,600 units, didn't you read the diagram? 
I confess I've no idea what compound you're getting at, though I'm looking forward to seeing the results. (Are you biosynthesizing enzymes?)
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Oscilllator
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Nono. Proteins don't count, remember? Big hint: This is an inorganic compound
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Etaoin Shrdlu
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Didn't know whether you were going to argue deliberate biosynthesis was a qualifier.
Not a clue.
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Metacelsus
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Phosphotungstic acid has been mentioned, but that doesn't have a MW of 23000+.
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bismuthate
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I am going way to far to counter this.
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blogfast25
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Yeah, in UNDER 24 h, so you can submit fast! 
But what is it? It strikes me as neither a polymer (an oligomer maybe) nor a protein.
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blogfast25
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Talking about this 'antimony ferrocyanide':
| Quote: Originally posted by bismuthate | Antimony Ferrocyanide
Sb4(Fe(CN)6)3*(H2O)25
1573.2702 g/mol
5g of antimony from a nearby welding supply was added to 40mL of 39% muriatic pool acid.
It is left to react for 2 days.
Decant the solution.
Mix this solution with 6g of potassium ferricyanide obtained from impure blue toner and 6g of sodium metabisulfite in 40mL of water.
3K4[Fe(CN)6]+4SbCl3=Sb4[Fe(CN)6]3+12KCl
Filter and dry the precipitate.
https://www.dropbox.com/sc/87jprnifb6tdpud/AACuptOR9fzKQCR7k...
[Edited on 16-11-2014 by bismuthate] |
I have serious doubts that that is what Bismuthate obtained.
Antimony is an acid former, not a base former. Sb(III) salts are almost unheard of: even SbF<sub>3</sub> in the molten state conducts
electricity only poorly.
SbCl<sub>3</sub> is a prevalently covalent compound that hydrolyses very strongly in water.
Salts of antimony invariably contain the element as anions, like antimonites, antimonates or halo substituted forms of these. H2SbF7 is a 'superacid'.
Bismuthate should analyse his compound for antimony, before making these claims.
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deltaH
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If I may make a suggestion for future contests, perhaps make it a rule that contestants work from a referenced procedure that they report in
the write-up and that the compound is characterised in that or another reported reference and that there is at least some cursory attempt to correlate
the synthesised product to what it should be (be it m.p or appearance of crystals).
Simply growing decent crystals of the compound you made can go a long way to convincing sceptics that what you have is (a)reasonably pure and (b)what
you claim... but only if compared (at the very least) to what the paper describes the crystals should look like.
Otherwise, I fear that this contest will be riddled with, "I don't believe you"'s.
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Brain&Force
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Part of the rules state that the procedure must be described. I see no reason to limit the allowed procedures to those already referenced.
I would like to see more proof that antimony ferricyanide was formed though, for the reasons blogfast25 mentioned.
At the end of the day, simulating atoms doesn't beat working with the real things...
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Etaoin Shrdlu
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| Quote: Originally posted by blogfast25 |
Yeah, in UNDER 24 h, so you can submit fast!
But what is it? It strikes me as neither a polymer (an oligomer maybe) nor a protein. |
It was from an attempt to build 3-dimensional, structured polymers similar in complexity to biomolecules. http://phys.org/news/2011-01-giant-molecule.html
The original paper is in German, I think. I do not have access. doi:10.1002/ange.201005164
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unionised
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It's one of these I think.
http://en.wikipedia.org/wiki/Dendrimer
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bismuthate
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blogfast25, Sb3+ salts are actually quite common, but I'll analyze it.
I can analyze it for ferrocyanide, but how would I do so for Sb is a challenge.
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The Volatile Chemist
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| Quote: Originally posted by bismuthate | blogfast25, Sb3+ salts are actually quite common, but I'll analyze it.
I can analyze it for ferrocyanide, but how would I do so for Sb is a challenge.
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Are you sure the antimony was pure? Look for zinc impurities, maybe? Just a guess.
If it is pure, it's containing of Ferrocyanide should be enough.
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blogfast25
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Copper plates out antimony, like it does arsenic. So a copper plate or wire in the solution of your product should go black quickly (I've done this
with Sb(V) and it was very quick). Cu will not plate out any Zn or Sn which may accompany it.
The test is a preliminary forensic screening test for arsenic (still used today). Sb and As are distinguished from each other by the latter's deposit
dissolving in hypochlorite solutions.
@ES and Union: thanks! Interesting stuff...
[Edited on 18-11-2014 by blogfast25]
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bismuthate
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Now normally I would do that but I lack NaOH and therefor a way to put the Sb into solution with certainty.
EDIT: well actually I would use a marsh test, but that wouldn't work for obvious reasons.
[Edited on 18-11-2014 by bismuthate]
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Etaoin Shrdlu
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Yes, that's the word. Dendronized polymer, though.
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