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Testo

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  1. I suspect you could only get this kind of information (catalytic amounts, turnover number etc) from Journals on this topic. Hydrogenations that I've done don't generally need much (ca. 10% loading) and is good to use 3/4 times again (but with decreasing performance).
  2. I'm sure DMSO will dissolve it pretty well, however it is somewhat toxic.
  3. Hi testo, Why not join chemnet chem social group. Its a good platform for someone like you who is a chemistry bonker like me.

  4. It would entirely depend on what the molecule is exactly but I wouldn't bet on it
  5. Well borodin, the double distillation is slightly confusing but I don't think the last distillation is to remove water as there shouldn't be much in a fraction collected at 57-75C, thats why it's dreid over Sodium carbonate. I think it's just to purify the acetone again because the fraction collected wasn't very pure, that's the only reason i would do two distillations - if the first one failed to give me my product! Unusual to see that in a procedure however...
  6. Testo

    Bond-Lengths?

    Well an IR absorption spectrum would be capable of detecting the transistions from the ground state to the first excited state and assuming the rigid-rotor (for roational spectra) model you can calculate the bond length from the transistions. And yeah it will have to be in the gas phase and free of other gases of course =)
  7. Okay if you have carried out the reaction and distilled it you should have found that acetone (product) boils at around 60C and propan-2-ol (any unreacted starting material) at around 85C. So the first collection should contain the product. You wont have any salt in there arter the distillation, but u may have some water, thats why you need to dry it. Acetone has a distinct smell from propan-2-ol, thats the easiest way of knowing which is which.
  8. You seem to be under the impression that I have invented this system, i have not! And i'm very capable of counting electrons thank you, i think you need to get over the fact that this is nomenclature not 'how many outer electrons does the elements in the group have'. i agree that it is a silly numbering system but there it is. In fact here is somebody whining about it; http://homepages.paradise.net.nz/totomark/PeriodicTable/MarksBrosPT1994.html
  9. I think you mean sodium acetate, and no theres no faster way to remove solvents than with heating them in a vaccum (just depends how good the vaccum is). You do need higher atmospheres to get liquid CO2 and no theres no cheap way to do it. Also what the hell do you want it for?
  10. Zn has a full 4s orbital, Cu has an unpaired electron in the 4s - the reason for why Zn has a higher ionisation energy is due to the pairing energy difference i.e. you need to put in more energy to unpair an electron (also compare Ag with Cd and Au with Hg). But as to why the radius is larger I don't really know...
  11. 1. Well its a bit fuzzy actually, your right in saying 4s is lower in energy but there are several exceptions to when the 3d is filled preferentially, most notably a half filled d-subshell has an element of stability (see hunds rules) so u get 4s13d5 instead of 4s23d4 etc. 2. It's just an old system of naming the groups, groups 1-18 are used now for clarity 3. Assuming u want the S- ion then yeah thats your answer.
  12. Well you can either buy it from sigma-aldrich or you can make it by adding sodium bicarb (backng soda) with acetic acid (in vinegar) and then boiling off the water and crystallising the sodium acetate.
  13. Well I can't really answer your question without more information but heres the IUPAC rules in full... http://www.acdlabs.com/iupac/nomenclature/
  14. Testo

    Group 17

    I'm not sure where he quotes them as being F block (although the links to wikipedia do), he writes the lanthanides and actinides underneath the rest of the table which is quite common so i guess it's a little unfair to call him a moron. Perhaps Peter Atkins is also a moron for following the same convention?
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