Substitution and Elimination

S_N1 - A Nucleophilic Substitution in which the Rate Determining Step involves 1 component.

S_N2 - A Nucleophilic Substitution in which the Rate Determining Step involves 2 components.

E1 - A Nucleophilic Elimination in which the Rate Determining Step involves 1 component.

E2 - A Nucleophilic Elimination in which the Rate Determining Step involves 2 components.

E1cB - A Nucleophilic Elimination in which the Rate Determining Step involves 1 component, but elimination occurs from the conjugate base of the starting material. The first step of this reaction forms the conjugate base by deprotonation.