The<unk>  (also known as bimolecular substitution nucleophilic) is a type of nucleophilic substitution, where a lone pair from a nucleophile attacks an electron deficient electrophilic center and bonds to it, expelling another group called a leaving group. Thus the incoming group replaces the leaving group in one step. Since two reacting species are involved in the slow, rate-determining step of the reaction, this leads to the name bimolecular nucleophilic substitution, or<unk> . The somewhat more transparently named analog to<unk>  among inorganic chemists is the interchange mechanism.
SN2 reaction
One-electron reduction
Di-pi-methane rearrangement
Aldol reaction
Exothermic reaction
Degenerate energy level
Fischer esterification
Edman degradation