Site-Selective Carbene-Induced C–H Functionalization Catalyzed by Dirhodium Tetrakis(triarylcyclopropanecarboxylate) Complexes

Three
types of dirhodium tetrakis­(tri­aryl­cy­clo­pro­pane­car­boxy­late)
complexes were generated and shown to adopt disparate high-symmetry
structures. These catalysts were evaluated in the intermolecular C–H
functionalization of an array of terminally substituted n-alkanes and displayed various site-selectivity as a function of
catalyst and substrate structure, which could be correlated through
quantitative relationships.