Correlation between thermochemical and antiscuff characteristics of organosulfur compounds

Formation of Ferrous Didodecanethiolate in the Mechanochemical Reaction between Dodecanethiol and Metallic Iron and Iron Sulfides: Investigating the Effect of Different Additives and Solvents

“…Since neither 1 H NMR nor EI mass spectrometry detected dodecene-1 among the products of the mechanochemical reaction between DdSH and pyrite (exps. 18, 19), we may conclude that H 2 S does not form as a result of DdSH hydrodesulfurization via the reaction (4) In the scientific literature, we found only a few studies that addressed the mechanochemical decomposition of pyrite.…”

“…(3) The formation of ferrous dithiolates was not observed upon mechanochemical activation of the reaction between organic disulfides and metallic iron [4,5].…”

“…Dioxygen and DBDS did not prevent the formation of Fe(SDd) 2 (exps. 12, 13), even though DBDS produces an FeS film on an iron surface as a result of its mechanochemically activated reaction with the metal [4]. In the latter case, this seems to be related to the FeS being produced at a slower rate than Fe(SDd) 2 .…”

“…The formation of Fe(SDd) 2 was identified by the color reaction for ferrous dithiolates containing n-alkyl or benzyl radicals. In this reaction, the brown color due to Fe(SDd) 2 changes into green upon contact with dioxygen [4,5].…”

“…We detected the tribochemical reaction leading to the formation of ferrous dithiolate during the boundary friction of steel surfaces in an environment containing individual thiols for the first time in 1996 [3]. It was shown in [4] that organic disulfides, as distinct from thiols, did not produce ferrous dithiolates during boundary friction between steel surfaces. A color reaction specific to ferrous dithiolates containing n-alkyl and benzyl moieties was described for the first time, conclusive evidence against the thiolate (mercaptide) mediated mechanism of antiwear-anti-scoring action of organic disulfides.…”