Spontaneous oxidation of a sulfide in zeolite CaY: the unprecedented reaction of a sulfide radical cation with oxygen

Abstract

Addition of 1,5-dithiacyclooctane (1,5-DTCO) to CaY resulted in electron transfer formation of the corresponding radical cation, which was characterized by EPR and diffuse reflectance UV-VIS spectrometry and which undergoes an unprecedented reaction with molecular oxygen to give mono-and bis-sulfoxide products.

1,2-Dications in Organic Main Group Systems

“…124 Interestingly, oxidation of 1,5-dithiacyclooctane 10 with 1 equiv of NOBF 4 in propionitrile led to the formation of paramagnetic dimeric dication solid 26 which was transformed into 1,5-dithiacyclooctane radical cation 11 when redissolved in acetonitrile. In an interesting recent finding, Clennan and Zhou 125 reported that addition of 1,5-dithiacyclooctane to zeolite CaY in the presence of molecular oxygen results in spontaneous oxidation of the bissulfide to mono-and bis-sulfoxides. The oxidation proceeds through formation of the corresponding radical cation, which was characterized by EPR and diffuse reflectance UV-Vis spectroscopy.…”

“…In an interesting recent finding, Clennan and Zhou reported that addition of 1,5-dithiacyclooctane to zeolite CaY in the presence of molecular oxygen results in spontaneous oxidation of the bis-sulfide to mono- and bis-sulfoxides. The oxidation proceeds through formation of the corresponding radical cation, which was characterized by EPR and diffuse reflectance UV−Vis spectroscopy.…”