Electron paramagnetic resonance (EPR) study of γ-radiation-induced radicals in 1,3,5-trithiane and its derivatives

Electron paramagnetic resonance (EPR) study of γ-radiation-induced radicals in 1,3,5-trithiane... Radicals formed in γ-irradiated 1,3,5-trithiane (TT) and its three derivatives, α- and β-2,4,6-trimethyl-1,3,5-trithiane (α-TMT and β-TMT), and 2,4,6-trimethyl-2,4,6-triphenyl-1,3,5-trithiane (TMTPT), were studied by the electron paramagnetic resonance (EPR) method in the solid state. The sulfur radical cations (>S+•) were identified in all compounds at 77 K. In TT and its two derivatives, α-TMT and β-TMT, the >S+• decay via deprotonation-forming C-centered radicals. Further increase of temperature up to 293 K results in the appearance of thiyl-type radicals (RS•). In TMTPT, the >S+• are stable up to 250 K. They formed the intermolecularly three-electron-bonded dimeric radical cations (S∴S)+ while RS• radicals were not observed. Some of the radical assignments and their EPR parameters (g and a hyperfine splittings) obtained support from the DFT calculations. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

Electron paramagnetic resonance (EPR) study of γ-radiation-induced radicals in 1,3,5-trithiane and its derivatives

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Springer Netherlands
Copyright © 2009 by Springer Science+Business Media BV
Chemistry; Inorganic Chemistry ; Physical Chemistry ; Catalysis
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