Identify the correct statement(s) regarding the fundamental principles of 1,2-shifts in carbocations — Reaction Mechanism Chemistry Question

💡 Solution & Explanation

A fundamental rule of standard carbocation rearrangements is that they are driven by the thermodynamic formation of a more stable carbocation (A is true). The migrating group (hydride, alkyl, or aryl) acts as an internal nucleophile, taking its electron pair with it (B is true). The concerted migration proceeds through a bridged, three-center, two-electron cyclic transition state (C is true). Resonance stabilization is a primary driving force for rearrangements (D is false).