A concept, broken down to first principles.
SN1 vs SN2: SN1 happens in two steps with a stable carbocation. SN2 is one step, with the nucleophile attacking from the back. Prof's analogy at 41:22: SN1 is a door that opens then someone walks in; SN2 is one fluid push.
If you don't get carbocation stability, you don't pass this exam.Dr. Patel · 38:14


