Year: 2026
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Recently, N,C,N-bismuth pincer complexes have been shown to engage in a rich repertoire of redox chemistry, which has been harnessed in a myriad of catalytic organic reactions. Despite their ability to maneuver between various oxidation states, the thermodynamic landscape of the redox speciation has never been systematically studied, hampering a deeper understanding of low-valent bismuth redox manifolds. In this work, we probed the stability of a dimeric N,C,N–Bi( II ) pincer ( 2OTf ) toward disproportionation in the presence of strongly and weakly coordinating anions, categorized by their coordinating ability index (α). While the complex persists in the presence of noncoordinating anions (α ≤ −0.4), it undergoes disproportionation to the corresponding Bi(I) ( 1 ) and Bi(III) ( 3X ) complexes in the presence of coordinating anions (α ≥ 1). When the α falls between −0.4 and 1, excess electrolyte is required for disproportionation. These findings were guided by cyclic voltammetry experiments and further corroborated by spectroscopic and crystallographic characterization of the reaction products.
Source: Organometallics
Institution: Max-Planck-Institut für Kohlenforschung
Language: English
Subfield: Inorganic Chemistry
Field: Chemistry
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
OpenAlex ID: W7140189413