Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume -, Issue -, Pages -Publisher
AMER CHEMICAL SOC
DOI: 10.1021/jacs.2c11113
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- Israeli Science Foundation [1449/19]
- ISF-NSFC [3673/21]
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This study explores the application of nitrogen Lewis acids based on nitrenium cations in the fields of chemistry and catalysis, revealing the multimodal reactivity of N-H-triazanes that can produce N-cation, N-anion, or N-radical. The successful isolation and characterization of a stable naphto[1,2,3]triazinyl radical opens up possibilities for its versatile use in synthetic and materials chemistry.
The employment of nitrogen Lewis acids based on nitrenium cations has been increasingly featured in the fields of main group chemistry and catalysis. A formally reduced form of nitrenium D -cyclic triazanes E -are intriguing chemical compounds, the chemistry of which is completely unexplored. In this work, we reveal that N-H-triazanes exhibit unusual N-H bond properties; namely, they can serve as protons, hydrides, or hydrogen atom donors. This unique multimodal reactivity provides an N-cation, N-anion, or N-radical from the same species. It allowed us to isolate, for the first time, a stable naphto[1,2,3]triazinyl radical, which was fully characterized both computationally and experimentally, including its monomeric X-ray structure. Moreover, this radical can be prepared directly from the nitrenium cation by a single electron reduction (E = -0.46 V), and this process is reversible. We envision versatile uses of this radical in synthetic and materials chemistry.
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