Redox-Neutral TEMPO Catalysis: Direct Radical (Hetero)Aryl C-H Di- and Trifluoromethoxylation.

Applications of TEMPO catalysis for the development of redox-neutral transformations are rare. Reported here is the first TEMPO -catalyzed, redox-neutral C-H di- and trifluoromethoxylation of (hetero)arenes. The reaction exhibits a broad substrate scope, has high functional-group tolerance, and can be employed for the late-stage functionalization of complex druglike molecules.

Prediction of a Nonvalence Temporary Anion Shape Resonance for a Model (HO) System.

Ab initio calculations are used to demonstrate the existence of a nonvalence temporary anion shape resonance for a model (HO) cluster system with no net dipole moment. The cluster is composed of two water dimers, the distance between which is varied. Each dimer possesses a weakly bound nonvalence anion state.