Solvent-Responsive Radical Dimers
An air- and thermally stable aryl dicyanomethyl radical is reported that switches between two dimeric forms—a σ dimer and a π dimer—by changing the solvent. The two dimer forms exhibit unique optical properties leading to solvatochromic behavior. The solvent-responsive behavior of these radicals can be explained by the higher polarizability of the pimer than the σ dimer that leads to pimer stabilization in polar solvents.
This document is the unedited Author’s version of a Submitted Work that was subsequently accepted for publication in Organic Letters, copyright © American Chemical Society after peer review. To access the final edited and published work see DOI: 10.1021/acs.orglett.0c02152. Posted with permission.