SN1 Mechanism: The SN1 mechanism involves a nucleophilic attack by a nucleophile on an electrophile in a solvent. This mechanism occurs when the substrate d...
SN1 Mechanism:
The SN1 mechanism involves a nucleophilic attack by a nucleophile on an electrophile in a solvent. This mechanism occurs when the substrate dissociates into two ions, a nucleophile and an electrophile, before the nucleophile attacks. The nucleophile attacks the electrophile, forming a bond with it. The substrate then breaks into two products, the nucleophile and the electrophile.
SN2 Mechanism:
The SN2 mechanism involves simultaneous attack and displacement. In this mechanism, the nucleophile and electrophile attack each other simultaneously, forming a bond between them. This mechanism is faster than the SN1 mechanism because the nucleophile and electrophile are already in close proximity to each other. The substrate also breaks into two products simultaneously.
Comparison:
The SN1 mechanism involves a nucleophilic attack, while the SN2 mechanism involves simultaneous attack and displacement.
The SN1 mechanism is slower than the SN2 mechanism, but it is more selective.
The SN1 mechanism is favored by polar solvents, while the SN2 mechanism is favored by nonpolar solvents.
The SN1 mechanism is used when the substrate is a tertiary alkyl halide, while the SN2 mechanism is used when the substrate is a primary or secondary alkyl halide