3658-80-8Relevant articles and documents
Formation of dimethyloligosulfides in Lake Kinneret: Biogenic formation of inorganic oligosulfide intermediates under oxic conditions
Ginzburg, Boris,Dor, Inka,Chalifa, Irit,Hadas, Ora,Lev, Ovadia
, p. 571 - 579 (1999)
The mechanism of formation of dimethyloligosulfides in Lake Kinneret was investigated by field and laboratory studies. The process was simulated under laboratory conditions using obligate aerobic and facultative bacteria that were isolated from Lake Kinneret and fed with different types of organo-sulfur nutrients. The lysis products of Peridinium gatunense - a dinoflagellate that dominates the phytoplankton population in Lake Kinneret during the winter - spring season - are the primary source of dimethyloligosulfides. Bacterial assimilation of the aged alga or algae lysis products yields inorganic oligosulfides, which are then methylated to form the dimethyloligosulfides. All the steps of this process are carried out under oxic conditions.
Allium discoloration: The color-forming potential of individual thiosulfinates and amino acids: Structural requirements for the color-developing precursors
Kubec, Roman,Velisek, Jan
, p. 3491 - 3497 (2007)
Structural requirements for compounds involved in Allium discoloration have been investigated in detail. The abilities of all 20 protein amino acids and six naturally occurring 1-propenyl-containing thiosulfinates to form the pigments have been studied. Furthermore, several analogues of these thiosulfinates were prepared by synthesis, and their color-forming abilities were evaluated, together with those of various amino compounds. It has been found that an unsubstituted primary amino group and a free carboxyl group are essential structural features required for amino compounds to be able to generate the pigments. Out of the thiosulfinate analogues tested, only those containing at least a three-carbon chain with the β-carbon bearing a hydrogen atom yielded the pigments after reacting with glycine. Thiosulfonates, sulfoxides, sulfides, and disulfides did not form any colored products when mixed with glycine. The pH optimum for pigment formation has been found to be between 5.0 and 6.0 for all thiosulfinates tested.
Effect of Zinc Oxide on the Thermal Decomposition of Dimethyl Sulfoxide
Chen, Liping,Chen, Wanghua,Guo, Zichao,Li, Huabo,Weng, Shichun,Wu, Wenqian
, (2022/03/14)
Dimethyl sulfoxide (DMSO) is widely used in the chemical industry. However, it has a non-neglectful thermal runaway risk due to the nature of self-accelerating decomposition near the boiling point. Under the background that zinc oxide (ZnO) may extend the isothermal induction period of thermal decomposition of DMSO, this article conducts an in-depth study for the phenomenon with the techniques such as differential scanning calorimetry (DSC), accelerating rate calorimetry (ARC), gas chromatography-mass spectrometry (GC-MS), X-ray photoelectron spectroscopy (XPS), and X-ray diffractometry (XRD). After being mixed with ZnO, the maximum decomposition rate of DMSO was significantly reduced and the adiabatic induction period of DMSO decomposition was extended by 3.27 times, indicating that the thermal decomposition intensity of DMSO was obviously reduced. It was experimentally demonstrated that ZnO did not change the decomposition pathways of DMSO, but it could promote the decomposition of methanethiol, which was a decomposition intermediate of DMSO and could potentially serve as a promoter on the decomposition of DMSO.
K2S as Sulfur Source and DMSO as Carbon Source for the Synthesis of 2-Unsubstituted Benzothiazoles
Deng, Guobo,Kuang, Daizhi,Liang, Yun,Yang, Yuan,Yu, Jiangxi,Zhang, Fuxing,Zhu, Xiaoming
supporting information, p. 3789 - 3793 (2020/06/04)
We describe a three-component reaction of o-iodoanilines with K2S and DMSO that provides 2-unsubstituted benzothiazoles in moderate to good isolated yields with good functional group tolerance. Electron-rich aromatic amines and o-phenylenediamines instead of o-iodoanilines provided 2-unsubstituted benzothiazoles and 2-unsubstituted benzimidazoles with and without K2S under similar conditions. Notably, DMSO plays three vital roles: carbon source, solvent, and oxidant.
Catalytic reactions of dimethyl disulfide with thiophene and benzene
Mashkina,Khairulina
, p. 72 - 81 (2016/04/20)
The gas-phase reaction of dimethyl disulfide with thiophene proceeds under the action of acid catalysts under atmospheric pressure at 160-350°C and a residence time of τ = 0.6-21 s to form thioalkylation and alkylation products. Dimethyl disulfide reacts with benzene to form only alkylation products. Catalysts containing both strong protic and Lewis acid sites, as well as basic sites of moderate strength, are the most active ones.
Chromatographic component of identification of the transformation products of 1,1-dimethylhydrazine in the presence of sulfur
Zenkevich,Ul'Yanov,Golub,Buryak
, p. 1106 - 1114 (2014/08/05)
The gas-chromatographic retention indices of the products of 1,1-dimethylhydrazine transformations in the presence of sulfur allows one to confirm and, in ceratin cases, make more exact the results of their gas chromatography-mass spectrometry identificat
Synthesis, stability, and reactivity of [(TPA)Zn(SH)]+ in aqueous and organic solutions
Galardon, Erwan,Tomas, Alain,Roussel, Pascal,Artaud, Isabelle
scheme or table, p. 3797 - 3801 (2011/11/29)
Reaction of the complex [(TPA)Zn(H2O)]2+ [TPA = tris(2-pyridylmethyl)amine] with hydrogen sulfide in aqueous buffered solution gives the corresponding monomeric hydrogensulfido complex [(TPA)Zn(SH)] +, which was fully characterized, including by XRD. This complex is stable at neutral pH, but decomposes under basic conditions to yield the free ligand and zinc sulfide, and under acidic conditions to give hydrogen sulfide and the starting aqua complex. In organic solvents, the coordinated sulfur atom reacts with electrophiles such as methylmethanethiosulfonate to yield methyltrisulfide. Reaction with the hydroxo complex [(TpPh,Me)Zn(OH)] [TpPh,Me = hydridotris{(5-methyl-3-phenyl)pyrazolyl}borate] promotes the formation of the unsymmetrical dinuclear μ-sulfido species [(TPA)Zn-S-Zn(TpPh,Me)]+, which, upon treatment with one molar equivalent of trifluoroacetic acid, dissociates into [(Tp Ph,Me)Zn(SH)] and [(TPA)Zn(CF3CO2)] +, resulting in the transfer of the hydrogensulfido ligand from one zinc center to another.
Process for the preparation of organic disulfides
-
Page column 5, (2008/06/13)
The invention relates to a process for the preparation of organic disulfides by oxidation of mercaptans with sulfur dissolved in an organic disulfide using an amine as catalyst, where the mercaptans are used as “crude mercaptan stream” from a reaction of alcohols with hydrogen sulfide over a catalyst suitable for mercaptan synthesis. Furthermore, the invention relates to the use of the organic disulfides for the preparation of alkanesulfonic acids.
Sulfur-atom insertion into the S-S bond - Formation of symmetric trisulfides
Hou, Yihua,Abu-Yousef, Imad A.,Doung, Yen,Harpp, David N.
, p. 8607 - 8610 (2007/10/03)
The reaction of triphenylmethanesulfenyl chloride (3a) with acyclic disulfides 4 or 5 give the respective trisulfides 1 or 2 in moderate to good yield and selectivity. A mechanism is advanced to explain the chemistry.
Three sulfur atom insertion into the S-S bond - Pentasulfide preparation
Hou,Abu-Yousef,Harpp
, p. 7809 - 7812 (2007/10/03)
Chloro(triphenylmethyl)trisulfide (1) reacts under mild conditions with symmetric primary dialkyl disulfides and aromatic disulfides giving pentasulfides as the main products in good yield and selectivity. A mechanism involving a triphenylmethyl alkyl/phenyl tetrasulfide intermediate is discussed. (C) 2000 Elsevier Science Ltd.
