In a standard concerted 1,2-hydride shift or 1,2-alkyl shift, how many total atoms are directly inco — Reaction Mechanism Chemistry Question

💡 Solution & Explanation

A 1,2-shift occurs intramolecularly. The migrating group (whether a hydrogen atom or the central carbon of an alkyl group) begins forming a bond with the adjacent positively charged destination carbon while simultaneously breaking its bond with the origin carbon. This concerted process creates a temporary bridged, three-membered cyclic transition state consisting of the origin carbon, the destination carbon, and the migrating atom.