Transition-State Stabilization by n→π* Interactions Measured Using Molecular Rotors
作者:Erik C. Vik、Ping Li、Perry J. Pellechia、Ken D. Shimizu
DOI:10.1021/jacs.9b08542
日期:2019.10.23
A series of 16 molecular rotors were synthesized to investigate the ability of n→π* interactions to stabilize transition states (TS) of bond rotation. Steric contributions to the rotational barrier were isolated using control rotors, which could not form n→π* interactions. Rotors with strong acceptor π* orbitals such as ketones, aldehydes, and nitriles had greatly increased rates of rotation. The TS