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.
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.
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.
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.
Sulfite-Promoted C-H Fluoroalkyl Sulfuration of Imidazoheterocycles with Bromofluoroacetate and Elemental Sulfur
Gao, Yong-Chao,Huang, Zi-Hao,Zhang, Zhao-Sheng,Xie, Jin-Xin,Cui, Zi-Ning,Tang, Ri-Yuan
, p. 2541 - 2550 (2020)
A transition-metal-free sulfite-promoted three-component C-H sulfuration between imidazoheterocycles, elemental sulfur, and bromofluoroacetate is developed. Sulfites, including Na 2S 2O 4, NaHSO 3, and Na 2S 2O 3, are able to promote the formation of two C-S bonds in one step using elemental sulfur as a green sulfurating agent, allowing the rapid introduction of the synthetically useful S-fluoroacetate group into imidazoheterocycles. These new imidazoheterocycle derivatives bearing an S-fluoroacetate group can be easily modified to produce pharmaceutically attractive compounds.
The Pyrolysis of Heptathiazocine
Kudo, Yoshiyuki,Hamada, Shuichi
, p. 2391 - 2394 (1987)
Heptathiazocine was pyrolyzed into ammonia, tetrasulfur tetranitride, and tetrasulfur dinitride above 383 K in an argon atmosphere; then, the latter two intermediates finally degraded into sulfur and nitrogen.According to the stoichiometric correlation am
Gordon, A. R.
, p. 336 - 336 (1935)
Cleavage of SO2 on (η5-C5Me5)2Mo2(μ-S2)(μ-S)2 To form S8 and a Thiosulfate Complex, (η5-C5Me5)2Mo2(μ-S2)(μ-S)(μ-SSO3). Possible Role in Homogeneous Hydrogenation of SO2 Catalyzed by Mo-S Complexes
Kubas, Gregory J.,Ryan, Robert R.,Kubat-Martin, Kimberly A.
, p. 7823 - 7832 (1989)
Reaction of SO2 with solutions of Cp*2Mo2(μ-S2)(μ-S)2 (1) initially yields 1*SO2, which is shown by crystallography to contain an SO2 weakly bound to a μ-S (S-S = 2.60 Angstroem).SO2 further reacts with 1*SO2 to quantitatively give Cp*2Mo2(μ-S2)(μ-S)(μ-SSO3) (2), which now contains an SO3 bound to the μ-S (S-S = 2.17 Angstroem).Effectively, a μ-S2O3 (thiosulfate) ligand is formed by an oxygen-transfer process, and the source of the oxygen as established by (18)O labeling is SO2.S8 is also produced, showing that SO2 has undergone net disproportionationto SO3 and S8.The raction rate is highly dependent on solvent polarity and base promoters such as Et3N.Sterically hindered amines do not accelerate the reaction, suggesting that they function as Lewis rather than Broensted bases.The X-ray structure of 2 is identical with that of a complex formed in low yield (along with dimeric oxosulfido complexes) by air oxidation of 1. 2 is readily hydrogenated at 25-75 deg C to regenerate 1, indicating that the mechanism of the previously studied hydrogenation of SO2 to S8 and H2O catalyzed by Mo-S complexes may involve 2 as an intermediate.Weak bases, e.g., Et3N, strip off the SO3 functionality in 2 to give primarily mixtures of isomers of 1 and products of base-SO3 interaction.Crystallographic data for Cp*2Mo2(μ-S2)(μ-S)(μ-S*SO2): space group P21/c; a = 13.738 (2) Angstroem, b = 10.581 (3) Angstroem, c = 17.331 (4) Angstroem, β = 92.41 (2)0; V = 2516.9 Angstroem3 at 296 K; Dcalc = 1.73 g/cm-1 for Z = 4; R = 6.2percent for 2017 independent reflections with I >/= 2?(I) and 2θ 0.Crystallogrphic data for Cp*2Mo2(μ-S2)(μ-S)(μ-SSO3): space group P21/c; a = 13.730 (5) Angstroem, b = 10.635 (3) Angstroem, c = 16.862 (2) Angstroem, β = 93.17 (5)0; V = 2458.5 Angstroem3 at 296 K; Dcalc = 1.81 g/cm-1 for Z = 4; R = 4.0percent for 2612 reflections with I >/= 2?(I) and 2θ 0.
Cataldo, Franco
, (1995)
Facile Construction of Yttrium Pentasulfides from Yttrium Alkyl Precursors: Synthesis, Mechanism, and Reactivity
Zhang, Fangjun,Zhang, Jie,Zhou, Xigeng
, p. 2070 - 2077 (2017)
Treatment of the yttrium dialkyl complex TpMe2Y(CH2Ph)2(THF) (TpMe2 = tri(3,5 dimethylpyrazolyl)borate, THF = tetrahydrofuran) with S8 in a 1:1 molar ratio in THF at room temperature afforded a yttrium pentasulfide TpMe2Y(κ4-S5) (THF) (1) in 93% yield. The yttrium monoalkyl complex TpMe2CpYCH2Ph(THF) reacted with S8 in a 1:0.5 molar ratio under the same conditions to give another yttrium pentasulfide [(TpMe2)2Y]+[Cp2Y(κ4-S5)]? (10) in low yield. Further investigations indicated that the S52- anion facilely turned into the corresponding thioethers or organic disulfides, and released the redundant S8, when it reacted with some electrophilic reagents. The mechanism for the formation of the S52- ligand has been investigated by the controlling of the reaction stoichiometric ratios and the stepwise reactions.
Efficient reduction of sulfur dioxide with hydrogen over TiO2-supported catalysts derived from ruthenium salts and ruthenium cluster complexes
Ishiguro, Atsushi,Liu, Yu,Nakajima, Takayuki,Wakatsuki, Yasuo
, p. 159 - 164 (2002)
Catalytic reduction of SO2 to elemental sulfur was carried out over supported ruthenium catalysts that were derived not only from hexaruthenium carbonyl cluster complexes but also from RuCl3 as the precursor. The activity was largely dependent on the kind of metal oxide support used. Compared to the known systems, the TiO2-supported ruthenium catalysts operated with higher efficiency at lower temperature. Moreover, the selectivity was totally to elemental sulfur, forming no detectable amount of unfavorable H2S. H2S-free catalysis appeared to be a common feature of ruthenium catalysts regardless of the kind of precursors. The TiO2-supported catalyst derived from [N(PPh3)2]2[Ru6C(CO) 16] was much more active within the 463-508 K temperature region than the catalyst conventionally prepared from RuCl3, while both showed similar activity at more elevated temperatures. The kind of cation in anionic cluster complexes and the presence of an interstitial atom are important factors in generating supported catalysts that operate under mild conditions.
Complexes of Copper(I) with Dimercapto Compounds as Catalysts for Oxidation of Mercaptans and Hydrogen Sulfide with Molecular Oxygen in Aqueous Solutions
Bagiyan,Koroleva,Soroka,Ufimtsev
, p. 88 - 94 (2003)
The conditions for formation of complexes of copper(I) with mercapto compounds in aqueousalkaline solutions and the catalytic activity of these complexes in oxidation of mercaptans and hydrogen sulfide was studied. The kinetic characteristics of these catalysts were compared with those of catalysts based on cobalt phthalocyanines. A method was proposed for suppressing formation of the thiosulfate ion in oxidation of H2S to elemental sulfur.
Partial oxidation of H2S to sulfur on V-Cu-O mixed oxides bronzes
Ruiz-Rodríguez, Lidia,Blasco, Teresa,Rodríguez-Castellón, Enrique,Nieto, José M. López
, p. 237 - 244 (2019)
The present paper shows the influence of Cu-content in Cu-promoted V2O5 catalysts on both the physicochemical characteristics of catalysts and their catalytic performance in the partial oxidation of hydrogen sulfide. Both, the catalytic activity for H2S conversion and the selectivity to sulfur increased when increasing the Cu/V ratio of catalysts. The best catalyst gives a selectivity to sulfur at ca. 98% at total conversion of H2S. According to the characterization results (XRD, FTIR), V2O5 is partially transformed into vanadium oxide bronze, i.e. β-Cu0.261V2O5, up to Cu/V ratios of 0.25. For higher Cu/V ratios, CuV2O6 and β-Cu0.261V2O5 are observed. In the same way, the reducibility of V-species increased when increasing the Cu/V ratio of catalysts. On the other hand, the characterization of used catalysts indicates the transformation of V2O5 into V4O9, whereas the vanadium oxide bronze is stable under the studied reaction. The catalytic results are explained on the basis of the nature of crystalline phases and the presence of V5+-O-V4+ pairs in the more selective catalysts.
Nachbaur, E.,Baumgartner, E.
, (1973)
Novel non-aqueous Fe(III)/Fe(II) redox couple for the catalytic oxidation of hydrogen sulfide to sulfur by air
Hua, Guoxiong,Zhang, Qingzhi,McManus, Derek,Slawin, Alexandra M. Z.,Woollins, J. Derek
, p. 1147 - 1156 (2006)
A series of Fe(iii) salts and organic solvents have been screened to develop novel non-aqueous catalysts for the conversion of H2S to sulfur. FeCl3/95% N-methylpyrrolidinone/5% H2O was found to be a most efficient non-aqueous system. The process chemistry, the proposed mechanism of catalytic oxidation of H2S, and the electrochemistry are discussed. The Royal Society of Chemistry 2006.
Unexpected formation of ammonium thiocyanate from the reaction of aqueous hydroxylamine with carbon disulfide
Rao, Muddamarri Hanumantha,Pallepogu, Raghavaiah,Muralidharan, Krishnamurthi
, p. 622 - 624 (2010)
Reaction of aqueous hydroxylamine with carbon disulfide in acetonitrile or in tetrahydrofuron unprecedentedly results in the formation of ammonium thiocyanate and sulfur.
Kubas, Gregory J.,Ryan, R. R.
, p. 6138 - 6140 (1985)
Nickel sulfides decorated sic foam for the low temperature conversion of H2S into elemental sulfur
Duong-Viet, Cuong,Nguyen-Dinh, Lam,Liu, Yuefeng,Tuci, Giulia,Giambastiani, Giuliano,Pham-Huu, Cuong
, (2018)
The selective oxidation of H2S to elemental sulfur was carried out on a NiS2/SiCfoam catalyst under reaction temperatures between 40 and 80 ?C using highly H2S enriched effluents (from 0.5 to 1 vol.%). The amphiphilic properties of SiC foam provide an ideal support for the anchoring and growth of a NiS2 active phase. The NiS2/SiC composite was employed for the desulfurization of highly H2S-rich effluents under discontinuous mode with almost complete H2S conversion (nearly 100% for 0.5 and 1 vol.% of H2S) and sulfur selectivity (from 99.6 to 96.0% at 40 and 80 ?C, respectively), together with an unprecedented sulfur-storage capacity. Solid sulfur was produced in large aggregates at the outer catalyst surface and relatively high H2S conversion was maintained until sulfur deposits reached 140 wt.% of the starting catalyst weight. Notably, the spent NiS2/SiCfoam catalyst fully recovered its pristine performance (H2S conversion, selectivity and sulfur-storage capacity) upon regeneration at 320 ?C under He, and thus, it is destined to become a benchmark desulfurization system for operating in discontinuous mode.
BIOMIMETIC REDUCTION OF SULFURIC ACID.
Oae,Togo
, p. 3818 - 3823 (1983)
Sulfuric acid and sodium sulfate were readily reduced to elemental sulfur and hydrogen sulfide upon treatment with a mixture of either one of polyphosphoric acid derivatives, PPE, PPA, and P//4O//1//0, which can form a mixed anhydride having -P-O-S- linkage, and iodide or thiol. Sulfur dioxide, which is undoubtedly one of the important intermediates, was trapped by p-tolyllithium to afford p-toluenesulfinic acid which was converted to p-tolyl methyl sulfone upon treatment with methyl iodide, though the yield was low. Sulfur trioxide which has been postulated as the key intermediate in the biological reduction of inorganic sulfate, was also trapped by mesitylene to give mesitylenesulfonic acid in a high yield. The reduction of sulfate to elemental sulfur and hydrogen suylfide is considered to proceed through the course which resembles the biological reaction path involved in the assimilatory metabolism of inorganic sulfate in microorganisms and plants.
Hollow sulfur@graphene oxide core-shell composite for high-performance Li-S batteries
Zhang, Jiawei,Yang, Ning,Yang, Xiaogang,Li, Shengji,Yao, Juming,Cai, Yurong
, p. 604 - 609 (2015)
In this paper, a hollow sulfur@graphene oxide core-shell composite is synthesized for high-performance lithium-sulfur batteries through a facile two-step solution method with the assistance of polyvinylpyrrolidone. Scanning electron microscope observation shows that the hollow sulfur sphere is coated by the homogeneous graphene oxide nanolayer, and thermogravimetric analysis demonstrates the composite holds sulfur loading as high as 92 wt%. The composite served as cathode in lithium-sulfur batteries shows its capacity as high as 745 mAh g-1 at 0.2C after 20 cycles. It also has an excellent cycling stability even at a high current density of 1C (73% retention and 96% coulombic efficiency after 150 cycles), implying that the diffusion of the polysulfides into electrolyte can be greatly inhibited. It is believed that the structure design of graphene oxide coated hollow sulfur sphere can be developed for the practical application of high-performance lithium-sulfur batteries.
Reaction of Nitroxyl (HNO) with Hydrogen Sulfide and Hydropersulfides
Zarenkiewicz, Jessica,Khodade, Vinayak S.,Toscano, John P.
, p. 868 - 877 (2021/01/14)
Nitroxyl (HNO) has gained a considerable amount of attention because of its promising pharmacological effects. The biochemical mechanisms of HNO activity are associated with the modification of regulatory thiol proteins. Recently, several studies have suggested that hydropersulfides (RSSH), presumed signaling products of hydrogen sulfide (H2S)-mediated thiol (RSH) modification, are additional potential targets of HNO. However, the interaction of HNO with reactive sulfur species beyond thiols remains relatively unexplored. Herein, we present characterization of HNO reactivity with H2S and RSSH. The reaction of H2S with HNO leads to the formation of hydrogen polysulfides and sulfur (S8), suggesting a potential role in sulfane sulfur homeostasis. Furthermore, we show that hydropersulfides are more efficient traps for HNO than their thiol counterparts. The reaction of HNO with RSSH at varied stoichiometries has been examined with the observed production of various dialkylpolysulfides (RSSnSR) and other nitrogen-containing dialkylpolysulfide species (RSS-NH-SnR). We do not observe evidence of sulfenylsulfinamide (RS-S(O)-NH2) formation, a pathway expected by analogy with the known reactivity of HNO with thiol.
Nitrosonium reactivity of (NHC)Copper(I) sulfide complexes
Jordan, Abraham J.,Walde, Rebecca K.,Schultz, Kelly M.,Bacsa, John,Sadighi, Joseph P.
supporting information, p. 9592 - 9596 (2019/08/22)
This study examines the reactivity of a series of copper(I) sulfide complexes stabilized by the expanded-ring N-heterocyclic carbene (NHC) 1,3-bis(2,6-diisopropylphenyl)-4,5,6,7-tetrahydro-1,3-diazepin-2-ylidene (7Dipp) toward the nitrosonium ion (NO+). 7Dipp is shown to support neutral sulfide- and disulfide-bridged dicopper(I) complexes, as well as mononuclear copper(I) hydrosulfide. The addition of NO+ to each of these results in the formation of NHC-supported copper(I) cations and elemental sulfur. Reduction of copper(I) to copper(0) is observed upon reaction of NO+ with dicopper(I) sulfide or disulfide, whereas ammonium ion formation is observed upon reaction of copper(I) hydrosulfide with NO+. Ammonium ion formation is likewise observed upon reaction of NO+ with (7Dipp)copper(I) hydride.
