Elimination (of Radicals)
Elimination (of Radicals) Definition:
n radical reaction mechanisms, a step in which a bond forms between the alpha (a) and beta (b) positions. As a result, a single bond at the b position is cleaved, causing the compound to fragment into two pieces.
Elimination (of radicals) Explained
A nucleophile pair of electrons (either from another bond or a lone pair) heads into a new Pi- bond as a leaving group departs. This process is called B-elimination because the bond B to the nucleophilic pair of electrons breaks. Transition metal complexes can participate in their own version of B-elimination, and metal alkyl complexes famously do so. The leaving group is not lost completely in organometallic B-eliminations. As the metal donates electrons, it receives electrons from the departing leaving group. When the reaction is complete, the metal has picked up a new Pi-bound ligand and exchanged one X-type ligand for another.