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• W2021379479 abstract "Three-electron σ-bonding that was proposed by Linus Pauling in 1931 has been recognized as important in intermediates encountered in many areas. A number of three-electron bonding systems have been spectroscopically investigated in the gas phase, solution and solid matrix. However, X-ray diffraction studies have only been possible on simple noble gas dimer Xe∴Xe and cyclic framework-constrained N∴N radical cations. Here, we show that a diselena species modified with a naphthalene scaffold can undergo one-electron oxidation using a large and weakly coordinating anion, to afford a room-temperature-stable radical cation containing a Se∴Se three-electron σ-bond. When a small anion is used, a reversible dimerization with phase and marked colour changes is observed: radical cation in solution (blue) but diamagnetic dimer in the solid state (brown). These findings suggest that more examples of three-electron σ-bonds may be stabilized and isolated by using naphthalene scaffolds together with large and weakly coordinating anions. Three-electron σ-bonds are known as intermediates in chemical reactions, but they typically are unstable and transient. Here, the authors observe, isolate and characterize a room-temperature-stable organic compound with a three-electron selenium–selenium σ-bond." @default.
• W2021379479 created "2016-06-24" @default.
• W2021379479 creator A5007855766 @default.
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• W2021379479 date "2014-06-11" @default.
• W2021379479 modified "2023-10-03" @default.
• W2021379479 title "Isolation and reversible dimerization of a selenium–selenium three-electron σ-bond" @default.
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• W2021379479 doi "https://doi.org/10.1038/ncomms5127" @default.
• W2021379479 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/24916712" @default.
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