The Xe Ion—Preparation and Structure

Drews, Thomas; Seppelt, Konrad

doi:10.1002/anie.199702731

Cited by 101 publications

(70 citation statements)

References 40 publications

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“…Gerson et al 32 and Alder et al 33 reported cyclic framework-constrained N'N three-electron s-bonds almost 30 years ago. In 1997, Drews and Seppelt 34 isolated and structurally characterized the Xe 2 þ ion containing a Xe'Xe three-electron s-bond.…”

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confidence: 99%

Isolation and reversible dimerization of a selenium–selenium three-electron σ-bond

Zhang

Wang

et al. 2014

Nat Commun

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Three-electron s-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 s-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 s-bonds may be stabilized and isolated by using naphthalene scaffolds together with large and weakly coordinating anions.

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confidence: 99%

Isolation and reversible dimerization of a selenium–selenium three-electron σ-bond

Zhang

Wang

et al. 2014

Nat Commun

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“…Typical examples are KrF"", KrzFs^, XeNHTeFs^, OaXeF", F(Xe02F)2'', and RCNXeF"^ salts by Professor Schrobilgen's group [21] andpiXei^ by Professor Seppelt's group from the Free University in Berlin [22] that provided an opportunity to obtain an experimental bond length for the only known noble-gas -noble-gas compound. These studies provide much needed structural informatioi^elping us to understand the nature of these compounds.…”

Section: Karl O Christe"mentioning

confidence: 99%

A Renaissance in Noble-Gas Chemistry

Christe

2001

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“…Gillespie and Pez [3] could find no evidence for the protonation of these gases in a HSO 3 F/SbF 5 /SO 3 "magic acid" system, one of the strongest known mixed Brønsted/Lewis acids. Drews and Seppelt [15] could find no evidence for the involvement of HXe + in the formation of the Xe 2 + ion in the somewhat stronger HF/SbF 5 [16] mixed acid system. Olah and Shen [17] found indirect evidence for the protonation of Xe and CO 2 in HF/SbF 5 by observing slowed rates of H exchange into D 2 when these gases were present.…”

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confidence: 91%

The Strongest Acid: Protonation of Carbon Dioxide

2015

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The strongest carborane acid, H(CHB11F11), protonates CO2 while traditional mixed Lewis/Brønsted superacids do not. The product is deduced from IR spectroscopy and calculation to be the proton disolvate, H(CO2)2+. The carborane acid H(CHB11F11) is therefore the strongest known acid. The failure of traditional mixed superacids to protonate weak bases such as CO2 can be traced to a competition between the proton and the Lewis acid for the added base. The high protic acidity promised by large absolute values of the Hammett acidity function (H0) is not realized in practice because the basicity of an added base is suppressed by Lewis acid/base adduct formation.

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The Xe Ion—Preparation and Structure

Cited by 101 publications

References 40 publications

Isolation and reversible dimerization of a selenium–selenium three-electron σ-bond

Isolation and reversible dimerization of a selenium–selenium three-electron σ-bond

A Renaissance in Noble-Gas Chemistry

The Strongest Acid: Protonation of Carbon Dioxide

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