Sterically encumbering m-terphenyl isocyanides have proven adept at stabilizing electron-rich and coordinatively unsaturated transition metal complexes. In this talk, we describe the syntheses of the mixed isocyanide-carbonyl species triangulo-M3(µ2-CO)3(CNArDipp2)3 (M = Pt, Pd; ArDipp2 = 2,6-(2,6-iPr-C6H3)C6H3). Remarkably, the Pt congener can be reduced by two electrons to provide triangulo-K2[Pt3(µ2-CO)3(CNArDipp2)3], an isolable congener to the unstable all-carbonyl variant triangulo-[Pt3(µ2-CO)3(CO)3]2–. The electronic structure of triangulo-K2[Pt3(µ2-CO)3(CNArDipp2)3] has been probed using density functional theory and infrared spectroscopy, revealing that the Π-acceptor capabilities of the ligands play a substantial role in kinetic stabilization of the dianion. Fundamental reactivity studies of this highly reduced species toward small molecules and Lewis acids will also be described.

Highly-reduced complexes of platinum and palladium supported by m-terphenyl isocyanides

251st National Meeting (2016)

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.