Book ChapterDOI
Sulfur-Centered Three-Electron Bonded Radical Species
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In this article, it was shown that if one of the antibonding σ* electrons is removed, the electronic σ/σ* configuration would be a slight repulsion of the two atoms.Abstract:
We all know that it is not possible to stabilize a He2 molecule. Any interaction of the filled He is orbitals would lead to the establishment of bonding a and antibonding σ* energy levels, both doubly occupied. As σ*, for quantum mechanical reasons, is raised a little bit more than σ is lowered relative to the original atomic energy levels the net result of this electronic σ/σ* configuration would be a slight repulsion of the two atoms. The situation becomes significantly different though if one of the antibonding σ* electrons is removed.
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Citations
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Electron spin resonance study of radiation-induced radicals in polycrystalline aromatic carboxylic acids containing a thioether group
TL;DR: In this paper, the electron spin resonance technique was used to identify radicals and radical ions formed on γ-radiolysis of aromatic carboxylic acids containing a thioether group in the polycrystalline state at 77-k and on subsequent warming over the temperature range of 95-293k.
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Femtosecond Electron Transfer and Real Time Investigation of a Disulfide Bond Formation
TL;DR: In this article, a transient state with a lifetime of 270 fs was identified as the direct precursor (RSR-)nRSR, R = CH3) of a sulfur-centered three-electron bond (2c, 3e).
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Photochemical and radiation-chemical aspects of matrix acidity effects on some organic systems
TL;DR: The role of matrix effects in radiolysis and photolysis is illustrated using two systems: organosulphur compounds and benzenediazonium salts as discussed by the authors, and their intermediates as detected by low temperature ESR and optical spectroscopy or FAB-MS give evidence that the main reaction pathways depend strongly on these effects.
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The Fate of Sulfur Radical Cation of N-Acetyl-Methionine: Deprotonation vs. Decarboxylation
TL;DR: In this article , the photooxidation of the biomimetic model of C-terminal methionine, N-Acetyl-Methionine (N-Ac-Met), sensitized by a 3-Carboxybenzophenone (3CB) excited triplet in neutral and basic aqueous solutions was investigated.
References
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An electrically neutral .sigma.-sulfuranyl radical from the homolysis of a perester with neighboring sulfenyl sulfur: 9-S-3 species
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Stabilization of oxidized sulfur centers in organic sulfides. Radical cations and odd-electron sulfur-sulfur bonds
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Structures and stabilities of singly charged three-electron hemibonded systems and their hydrogen-bonded isomers
Peter M. W. Gill,Leo Radom +1 more