Single electron oxidation of 2,3-diaminocyclopropenones is shown to give rise to stable diaminocyclopropenium oxyl (DACO) radical cations. Cyclic voltammetry reveals reversible oxidations in the range of +0.70-1.10 V (vs. SCE). Computational, EPR, and X-ray analysis support the view that the oxidized species is best described as a cyclopropenium ion with spin density located on the heteroatom substituents, including 23.5 % on oxygen. The metal-ligand behavior of the DACO radical is also described.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6546530 | PMC |
| http://dx.doi.org/10.1002/anie.201902265 | DOI Listing |
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