- #1
Entropia
- 140
- 1
Why are "Mg turnings" used in Grignard reactions instead of "regular" Mg?
What is so special about Mg turnings?
What is so special about Mg turnings?
Originally posted by Entropia
Why are "Mg turnings" used in Grignard reactions instead of "regular" Mg?
What is so special about Mg turnings?
Originally posted by himanshu121
as it may inc surface area for more effective rxn
You may remember it from your sophomore O. Chem. class. Basically, a magnesium inserts itself into a bond between an alkyl group and a halide, then adds to a carbonyl. So methyl bromide reacted with magnesium will react with acetaldehyde to produce isopropyl alcohol.Originally posted by Monique
What is a Grignard reaction?
shrumeo said:edit: I see someone mention Riecke Mg. Making this is an extreme pain (reducing MgCl2 with potassium in THF), but it's as active as you can get, maybe too reactive even. Can you buy this stuff yet? Surely it would be extremely hazardous to ship.
movies said:Elemental magnesium is very reactive and the surface oxidizes almost immediately in air. If you use the turnings then you can squash them a little bit in order to expose some of the interior metal which has not yet been oxidized. It's a nifty trick and works great!