t4091 (Stranger)
11-07-02 20:59
No 377558
      explanation of Al Hg Amalgum  Bookmark   

Can someone explain what happens in the reaction, and what are the best chemicals to clean and extract the freebase after the amalgum is finished.
 
 
 
 
    Rhodium
(Chief Bee)
11-07-02 21:12
No 377561
      ../rhodium/alhg.osmium.html  Bookmark   

../rhodium /alhg.osmium.html
 
 
 
 
    Protium
(Hive Bee)
11-07-02 21:24
No 377567
      Al/ Hg basics  Bookmark   

../rhodium /alhg.osmium.html

+ a whole lot more in the search engine

I'm kind of 'on the fence' as to whether or not this should be in the newbee forum, but today is a great day.....

The simplest explanation of what is going on, and I assume you are talking about the nitro Al/Hg, is that the nitromethane is reduced to a primary amine (methylamine) by the amalgamated aluminum which condenses with the ketone to form an imine.  This imine is further reduced to the secondary amine, also by the Al/Hg.  Give you three guesses what the secondary amine is laugh

The best (most commonly preferred) solvents to use are toluene or xylene, and an NaOH wash, a brine (saturated salt solution) wash, and a water wash are customary.  Some people like to dry the solvent, prior to making the hydrochloride salt, with baked epsoms; but if your yeilds are good you probably won't need to bother.

EDIT: However, my timing seems to be horrible.


Pr(+)tium