Aqueous high-temperature chemistry of carbo- and heterocycles. 13. Sulfides and disulfides

Pyrolysis of coal-tar asphaltene in supercritical water

“…Moreover, the previous study [12] reported that SCW apparently participates in the reaction and its hydrogen was used for capping the radicals generated during upgrading of asphalt, which could result in an increasing yield of maltene. Other studies [13,14] showed that C-S and C-O bonds could be cleaved easily in high-temperature water. The reactions of some compounds in SCW were investigated using a tube reactor and the results indicate that C-O, C-S and C-N bonds could rupture in SCW and a part of the free radicals might quenched by H • or OH • from water [2].…”

Hydrous pyrolysis of organic sulfur compounds: Species and distribution of secondary derivatives

“…The occurrence of alkyl thiophenes and oxidized sulfur compounds in the pyrolysates of thiols and sulfides seems to be different from the results from the thermolysis and aquathermolysis of aliphatic thiols by Siskin et al [25] and Katritzky et al [2,26]. For example, Katritzky et al [26] reacted 1-decanethiol with water and cyclohexane at 250 • C for up to 13.5 days and the major secondary compounds were various isomeric didecyl sulfides, disulfides and even trisulfides.…”

“…For example, Katritzky et al [26] reacted 1-decanethiol with water and cyclohexane at 250 • C for up to 13.5 days and the major secondary compounds were various isomeric didecyl sulfides, disulfides and even trisulfides. When the temperature was increased to 300 • C, 33% of starting compound was converted to 1-, 2-and 3-decanethiols, while only a small amount of the initial compound was converted to 2-hexyl pentamethylene sulfide (1%) and dodecylsulfide (2%).…”

Manganese‐Octacyanidoniobate‐Based Ferrimagnet Possessing Bridging Ligands with Disulfide Bonds

“…[61] The CoÀ W assembly shows an interesting functionality of photoswitchable magnetism between paramagnetism and ferromagnetism. [62] In this work, focusing on a large-sized bridging ligand of 4,4'-dipyridyldisulfide (dpds) with disulfide bonds, [63][64][65][66][67][68][69][70] we attempted to introduce the dpds ligand into a molecule-based magnet with a cyanido-bridged coordination framework. Herein we present the synthesis, crystal structure, optical properties, and magnetic property of a cyanido-bridged MnÀ Nb assembly with bridging ligands of dpds possessing disulfide bonds, [Mn(dpds S1).…”