phazer1980
Harmless
Posts: 2
Registered: 19-8-2015
Member Is Offline
Mood: No Mood
|
|
Synthesis of betanitrostyrenes in aqueous medium
Hello
Say I dissolve some benzaldehyde in the absolute minimum of ethanol and mixed it with methylamine gas and some nitroalkane dissolved in water and
reluxed in for 4 hours AND the aldehyde and the ketone were both lower and liquids, would the condensation product, hopefully a betanitrostyrene, then
precipitate as soon as it form, not being soluble in a water/ethanol mixture? Or would the presence of so much water inhibit the condensation so much
that yields would be terrible?
I am trying to make the product fall out of solution as soon as it is formed both to make workup easier but also to drive the equilibrium to the right
by removing on of the products as soon as it forms, and if I combine this with a Dean stark setup to remove the second major product, water, then one
could maybe achieve quantitative yields.
What if I used other solvents that the nitrostyrene is not very soluble in? Any suggestions?
Also to remove water without a dean stark setup I have though about having a teabag of MgSO4 in the reaction mixture as free drying agent would mix
with the product falling out of solution. If I use the teabag in a solvent that MgSO4 is not at all soluble in wouldn't that work? removing water must
giver better yield according to the math anyway.
What do you experts think?
|
|
|
j_sum1
Administrator
Posts: 6250
Registered: 4-10-2014
Location: Unmoved
Member Is Offline
Mood: Organised
|
|
Hi phazer.
I don't know the answer to your question so can't help you much there.
It is board etiquette to put all threads without a reference in Beginnings. It sounds like you are following some procedure that you have read here.
If you post your source you will get a better quality of reply.
Welcome to SM.
|
|
|
gdflp
Super Moderator
Posts: 1320
Registered: 14-2-2014
Location: NY, USA
Member Is Offline
Mood: Staring at code
|
|
It is painfully obvious what you are trying to do, and that you have little to no knowledge of chemistry. I would recommend you follow one of the
many writeups elsewhere on the web. Sciencemadness is not the right place for you.
|
|
|
Bert
|
Thread Moved
19-8-2015 at 06:38 |
Bert
Super Administrator
Posts: 2821
Registered: 12-3-2004
Member Is Offline
Mood: " I think we are all going to die. I think that love is an illusion. We are flawed, my darling".
|
|
I'll let Nicodem kick this one to the kerb if he feels the thread deserves it-
In the meantime, please keep it in beginnings unless you include references or describe actual work you have done.
Rapopart’s Rules for critical commentary:
1. Attempt to re-express your target’s position so clearly, vividly and fairly that your target says: “Thanks, I wish I’d thought of putting it
that way.”
2. List any points of agreement (especially if they are not matters of general or widespread agreement).
3. Mention anything you have learned from your target.
4. Only then are you permitted to say so much as a word of rebuttal or criticism.
Anatol Rapoport was a Russian-born American mathematical psychologist (1911-2007).
|
|
|
byko3y
National Hazard
Posts: 721
Registered: 16-3-2015
Member Is Offline
Mood: dooM
|
|
Use NaOH as the only basic catalyst. Follow this procedure http://www.orgsyn.org/demo.aspx?prep=CV1P0413 . Tell us about your results.
|
|
|
![[*]](images/xpblue/default_icon.gif){kind=icon}
