10544-50-0Relevant articles and documents
Reaction of a stable germabenzene with chalcogens: Synthesis and structure of a novel germanium analog of pentathiepane, 1,2,3,4,5,6-pentathiagermepane
Nakata, Norio,Takeda, Nobuhiro,Tokitoh, Norihiro
, p. 66 - 71 (2003)
Treatment of a germabenzene (4) bearing a Tbt group (Tbt=2,4,6-tris[bis(trimethylsilyl)methyl]phenyl) with elemental sulfur gave a 1,2,3,4-trithiagermolane (5) together with a novel 1,2,3,4,5,6-pentathiagermepane (6), which is the germanium analog of pentathiepane. On the other hand, the reaction of 4 with elemental selenium gave only 1,2,3,4-triselenagermolane (7). All the newly obtained polychalcogenides containing a germanium atom were characterized by NMR spectroscopy and elemental analysis. The molecular structures of 5 and 6 were determined by X-ray crystallographic analysis. In addition, the thermolyses of 5 and 6 were examined.
Highly efficient synthesis of 2-mercaptobenzothiazole derivatives in water: Metal sulfide-disulfide dynamic interchange reaction
Lou, Chunqing,Zhu, Ning,Fan, Ronghua,Hong, Hailong,Han, Limin,Zhang, Jianbin,Suo, Quanling
, p. 1102 - 1108 (2017)
A convenient and efficient method for the synthesis of 2-mercaptobenzothiazoles from disulfide and CS2 mediated by a metal sulfide in water is described. This synthetic methodology could be used to prepare diverse 2-mercaptobenzothiazole derivatives in good to excellent yields. In this paper, the concept of metal sulfide-disulfide dynamic interchange reaction was put forward. Then the intermediates of the interchange reaction between NaHS and a disulfide were detected by LC-MS, which demonstrated that the S-S bond of the disulfide could be broken by the metal sulfide through the dynamic interchange reaction. In addition, NaHS was eventually transformed into sulfur S8 by the dynamic interchange reaction. Moreover, the underlying mechanism of 2-mercaptobenzothiazole formation is proposed, in which NaHS not only acts as an S-S bond cleaving agent but also as an activator of CS2. As a result, a novel synthetic route for the preparation of sulfur-containing heterocycles from a disulfide is developed.
Sonochemistry: C3S2 originated by ultrasounding carbondisulfide
Quellhorst, Heike,Binnewies, Michael
, p. 259 - 261 (1996)
Pure carbondisulfide was treated with ultrasound of a frequency of 20 kHz. Consequently small amounts of C3S2, S6, S7, and S8 were obtained, which could be seperated gas-chromatographically and detected by mass spectroscopy. The yields were approximately proportional to the period of influence. Johann Ambrosius Barth 1996.
A Multiunit catalyst with synergistic stability and reactivity: A polyoxometalate-metal organic framework for aerobic decontamination
Song, Jie,Luo, Zhen,Britt, David K.,Furukawa, Hiroyasu,Yaghi, Omar M.,Hardcastle, Kenneth I.,Hill, Craig L.
, p. 16839 - 16846 (2011)
A combination of polyanion size and charge allows the Keggin-type polyoxometalate (POM), [CuPW11O39]5-, a catalyst for some air-based organic oxidations, to fit snuggly in the pores of MOF-199 (HKUST-1), a metal-organic framework (MOF) with the POM countercations residing in alternative pores. This close matching of POM diameter and MOF pore size in this POM-MOF material, [Cu3(C9H3O 6)2]4[{(CH3)4N} 4CuPW11O39H] (1), results in a substantial synergistic stabilization of both the MOF and the POM. In addition, this heretofore undocumented POM-MOF interaction results in a dramatic increase in the catalytic turnover rate of the POM for air-based oxidations. While 1 catalyzes the rapid chemo- and shape-selective oxidation of thiols to disulfides and, more significantly, the rapid and sustained removal of toxic H 2S via H2S + 1/2 O2 → 1/8 S8 + H2O (4000 turnovers in 20 h), the POM or the MOF alone is catalytically slow or inactive. Three arguments are consistent with the catalytic reactions taking place inside the pores. POM activation by encapsulation in the MOF likely involves electrostatic interactions between the two components resulting in a higher reduction potential of the POM.
Transformation of 2-(4-chloro-5H-1,2,3-dithiazol-5-ylideneamino)-6-ethoxy-4-phenylpyridine-3,5-dicarbonitrile into 4-aminopyrido[2,3-d]pyrimidines and 2-(pyrid-2-yl)guanidines
Kalogirou, Andreas S.,Michaelidou, Sophia S.,White, Andrew J.P.,Koutentis, Panayiotis A.
, p. 1799 - 1807 (2015)
The reactions of 2-(4-chloro-5H-1,2,3-dithiazol-5-ylideneamino)-6-ethoxy-4-phenylpyridine-3,5-dicarbonitrile (14) with a range of primary and secondary amines are investigated. Treatment with n-BuNH2 and BnNH2 gave 1,3-di-n-butyl- and 1,3-dibenzyl-2-(3,5-dicyano-6-ethoxy-4-phenylpyrid-2-yl)guanidines 15a (32%) and 15b (82%), respectively. While treatment with Et2NH, n-Pr2NH or Bn2NH gave the analogous 4-dialkylaminopyrido[2,3-d]pyrimidines 16c-e in high yields. Treatment of the dithiazole 14 with pyrrolidine, piperidine or morpholine gave the analogous 4-dialkylaminopyrido[2,3-d]pyrimidines 16f-h, the 2-aminopyridine 13 and 2-(diamino-1-ylmethyleneamino)-6-ethoxy-4-phenylpyridine-3,5-dicarbonitriles 15f-h. The 4-dialkylaminopyrido[2,3-d]pyrimidines 16f-h are converted to the 2-(dialkylamino-1-ylmethyleneamino)-6-ethoxy-4-phenylpyridine-3,5-dicarbonitriles 15f-h upon further reaction with excess dialkylamines. The structure and origins of the two side products 17 and 18 are also discussed. Tentative mechanisms for these transformations are proposed.
Mechanochemical reactions of elementary sulfur and iron sulfides with hydrogen, oxygen, and water
Pavelko
, p. 981 - 987 (2008)
Mechanochemical reactions of elementary sulfur and iron sulfides with hydrogen, oxygen, and water were studied. Three reactions were discovered: (1) between elementary sulfur and dihydrogen, (2) between pyrite and dihydrogen, and (3) between elementary su
Unexpectedly efficient SO2 capture and conversion to sulfur in novel imidazole-based deep eutectic solvents
Zhao, Tianxiang,Liang, Jian,Zhang, Yating,Wu, Youting,Hu, Xingbang
, p. 8964 - 8967 (2018)
An innovative strategy for sustainable SO2 capture and conversion in novel imidazole-based deep eutectic solvents (DESs) is demonstrated in this work. These DESs exhibit an extremely high SO2 loading capacity (up to 1.39 g g-1/
Syntheses, structures and third-order nonlinear optical properties of heterometal and homometal clusters containing iron
Lu, Jing,Lü, Chang-Hai,Yu, Jie-Hui,Xu, Ji-Qing,Li, Yong,Zhang, Xiao,Wang, Tie-Gang,Yang, Qing-Xin
, p. 755 - 761 (2004)
Both the heterometal cluster {[FeMo2O10(FRA) 4(DMF)4]·2DMF} (1) (FRA = α-furoic acid) and the homometal cluster {Fe[DTC]4} (2) (DTC = diethyl-dithiocarbamate) were successfully synthesized by low-temperature solid-state reactions. X-ray single-crystal diffraction studies suggest that compound 1 is a hexanuclear cluster including two solvent DMF molecules, with α-furoic acid and DMF as auxiliary ligands, and compound 2 is a dinuclear neutral cluster. The two compounds were characterized by elemental analyses, IR spectra and UV-Vis spectra. The third-order nonlinear optical (NLO) properties of the clusters were also investigated and all exhibited nice nonlinear absorption and self-defocusing performance with moduli of the hyperpolarizabilities 1.21 × 10-31 esu for 1 and 5.123 × 10-31 esu for 2.
Photodegradation of methyl thioglycolate particles as a proxy for organosulphur containing droplets
Seng, Samantha,Picone, A. Lorena,Bava, Yanina B.,Juncal, Luciana C.,Moreau, Myriam,Ciuraru, Raluca,George, Christian,Romano, Rosana M.,Sobanska, Sophie,Tobon, Yeny A.
, p. 19416 - 19423 (2018)
Understanding the formation and transformation of sulphur-rich particles is of prime importance since they contribute to the global atmospheric sulphur budget. In this work, we performed a series of experiments on a photoactive organosulphur compound namely, methyl thioglycolate, as a model of an organosulphur species of marine origin. By investigating the photoproducts within levitated droplets, we showed that elemental sulphur (α-S8) and sulphate (SO42-) can be photochemically generated at the gas-liquid interface by heterogeneous interaction with gaseous O2 and H2O. These results demonstrate that the surface of levitated droplets facilitate the oxidation of methyl thioglycolate in the dark, while illumination is necessary to produce the oxidation in bulk experiments.
α-Sulfur as a metal-free catalyst to activate peroxymonosulfate under visible light irradiation for decolorization
Andrew Lin, Kun-Yi,Zhang, Zhi-Yu
, p. 15027 - 15034 (2016)
While transition metals have been frequently used to activate peroxymonosulfate (PMS) for chemical oxidation reactions, recently metal-free activation of PMS has also drawn great attention considering that no metal is required and the environmental impact can be minimized. In this study, orthorhombic α-sulfur (α-S), for the first time, is employed as a metal-free photocatalyst to activate PMS under visible (vis) light irradiation. To study the activation of PMS by the α-S/vis process, decolorization of rhodamine B (RhB) dye is selected as a model reaction. Parameters affecting the decolorization were investigated, including α-S loading, PMS dosage, temperature, pH, salt and inhibitors. The decolorization using PMS activated by α-S/vis was much faster than the self-activation of PMS. A higher α-S loading also facilitated the activation of PMS; however, over-loading of α-S led to the shielding effect, thereby decreasing the decolorization extent. Higher PMS dosages and temperatures were both preferable for the decolorization. While the decolorization was improved under acidic conditions, the activation of PMS was hindered under alkaline conditions. When high concentrations of NaCl were added to RhB solutions, the decolorization extent still remained almost the same. Electron paramagnetic resonance (EPR) spectroscopic analysis was performed to probe into the mechanism of PMS activated by the α-S/vis process. The α-S/vis process was found to be recyclable and stable over multiple cycles, even though α-S did not undergo any regeneration treatments. Considering these features, the α-S/vis process appears to be a promising and environmentally friendly process to activate PMS for chemical oxidation reactions.
