• Liquid density of different kinds of organic sulfur compounds with varying carbon number (20°C/68°F). Comparison of thiols, sulfides, disulfides and thiophenes. (engineeringtoolbox.com)
  • Tables and figures below show the liquid density at 20°C for different groups of organic sulfur compounds , compared to other kinds of organic classes as alkanes, alcohols, acids and amines . (engineeringtoolbox.com)
  • Also, examples of the structures of the sulfur compounds thiols, dialkyl sulfides, methylalkyl sulfides, ethyl alkyl sulfides, isopropyl alkyl sulfides, diisoalkyl sulfides, dialkyl disulfides and alkylthiophenes are shown in the table below. (engineeringtoolbox.com)
  • See also density for n-alkanes, alcohols and acids and density, boiling and melting points of nitrogen and sulfur compounds. (engineeringtoolbox.com)
  • We show that introducing sulfur-containing compounds into carbon feedstock may efficiently alter the chiral selectivity of a Co/SiO2 catalyst toward different chiral species. (confex.com)
  • Sulfur-containing compounds may be used as an efficient additive to tune the chirality of SWCNTs. (confex.com)
  • b) They have been shown to be chemically easier to handle than the corresponding sulphur compounds. (gutenberg.org)
  • Sulfur K-edge X-ray absorption near-edge structure (XANES) spectroscopy is used to measure how the speciation of sulfur compounds evolves within a warm-mix asphalt as a consequence of the Rolling Thin-Film Oven (RTFO) and Pressure Aging Vessel (PAV) oxidative aging procedures. (uri.edu)
  • Identifying the types of sulfur compounds present is important for quantifying the growth in polar sulfur-containing species that can alter the asphalt's mechanical properties over time. (uri.edu)
  • XANES analysis indicates that thiophenic sulfur compounds are most prevalent (62%), followed by sulfide and elemental sulfur compounds. (uri.edu)
  • These are heterocyclic compounds containing a thiophene ring fused to an imidazolidine ring. (drugbank.com)
  • You will learn the various features of Shimadzu SCD which make it a reliable tool for analysing sulfur-containing compounds down to the trace level. (shimadzu.com)
  • This is demonstrated with various samples, such as trace thiophene in benzene (ASTM D7011 and D4735), sulfur compounds in light petroleum liquids (ASTM D5623), in natural gas and gaseous fuels (ASTM D5504), as well as in beers. (shimadzu.com)
  • Sulfur-33 Magnetic Resonance Spectra of Selected Compounds. (cdc.gov)
  • In chemistry, a Sulfur Compound is a chalcogen compound , that may be organic compounds ( such as organosulfur compounds ) or inorganic compounds, that contain as an integral part of the molecule a sulfur atom (S) . (wellnessadvocate.com)
  • Organic sulfur compounds such as sulfides, disulfides and thiophene do not interfere. (energyinst.org)
  • Commercial refined benzene-535 is free of hydrogen sulfide and sulfur dioxide, but contains a maximum of 1 ppm thiophene and a maximum of 0.15% nonaromatics. (cdc.gov)
  • Refined nitration-grade benzene is free of hydrogen sulfide and sulfur dioxide. (cdc.gov)
  • Benzene is also commercially available as thiophene-free, 99 mole%, 99.94 mole%, and nanograde quality (HSDB 2007). (cdc.gov)
  • Deep eutectic solvents (DESs) are developing as an alternate medium for aromatic extraction, especially benzene and thiophene from aliphatic hydrocarbon mixtures. (aiche.org)
  • In this work, molecular dynamics (MD) simulations were first used to investigate the solvation structure of benzene, thiophene, and n-hexane in monoethanolamine-based DESs. (aiche.org)
  • It reveals the liquid structures in the adjacent neighbour shells, which is a function of electron-withdrawing sulphur attached to thiophene and the Ï -electron cloud of benzene. (aiche.org)
  • The solvation of benzene, thiophene, and n-hexane in the deep eutectic solvent depends on volume expansion and minor solvent structural changes. (aiche.org)
  • The solvation shell structure and characteristics were investigated in tandem with the possibility of benzene and thiophene clustering. (aiche.org)
  • The 1H NMR and 2D 1Hâ 1H-NOESY were used to investigate the intermolecular interactions between benzene, thiophene, and n-hexane with monoethanolamine-based solvents. (aiche.org)
  • Finally, Deschloroetizolam is a structural relative of benzodiazepines, whereby the benzene ring has been replace by a thiophene ring. (alprazolamchemicals.com)
  • Thiophene is a five-membered aromatic ring containing four carbon atoms and a sulfur atom. (asianscientist.com)
  • Thiophene is a five-membered heterocyclic compound containing a sulfur heteroatom with the molecular formula C4H4S. (chemenu.com)
  • This report is the second edition of the market research of disulfide oil, dimethyl disulphide (DMDS) and thiophene in Russia. (infomine.ru)
  • The purpose of the study was to analyze the market for disulfide oil, dimethyl disulphide and thiophene in Russia. (infomine.ru)
  • This research is devoted to the analysis of the market of disulfide oil, its substitute - dimethyl disulphide (DMDS) and thiophene in Russia. (infomine.ru)
  • In the fifth chapter of the report, potential areas of consumption of disulfide oil, substitutes (DMDS) and thiophene are considered. (infomine.ru)
  • The reaction of carbon disulfide with diethyl 3-amino-2-cyano-2-penten-1,5-dicarboxylate: A convenient synthesis of polyfunctionally substituted thiophenes and their fused derivatives // Monatsh. (edu.ua)
  • The sulfur-containing aroma chemicals belong to the thiophene family and, together with nitrogen, to the thiazole and dithiazine systems. (perfumerflavorist.com)
  • Addition, Deschloroetizolam contains a thiophene ring fused to a diazepine ring, which is a seven member ring with the two nitrogen constituents located at R1 and R4. (alprazolamchemicals.com)
  • Herein, considering the problem about the leaching of iron ions and the optimization of heteroatoms doping, the iron, nitrogen and sulfur co-doped tremella-like carbon catalyst (Fe-NS@C) was rationally designed using very little iron, S-C3N4 and low-cost chitosan (CS) via the impregnation-calcination method. (bvsalud.org)
  • Scientists in Japan have developed a short route to form various organic semiconductors by simply heating mono-functionalized polycyclic aromatic hydrocarbons (PAHs) with sulfur. (asianscientist.com)
  • Thiophene-fused PAHs are organic molecules composed of multiple aromatic rings including thiophene. (asianscientist.com)
  • Thiophene is a five member aromatic ring with one sulfur atom. (alprazolamchemicals.com)
  • The stability of sulfonium ylides is determined by the electron delocalization of the carbanionic center and the substituents on the sulfur atom [10] . (beilstein-journals.org)
  • Thiophene is 5-membered ring consisting of four carbon atoms and one sulfur atom. (drugbank.com)
  • Notably, in terms of structural effects on the reactivity and stability of sulfur ylide-like intermediates, 2-pyridyl substituted compound 7a exhibited superior properties over those of others. (beilstein-journals.org)
  • Reactive thiophene intermediates, activated via sulfur oxidation or ring epoxidation, are possible culprits for these adverse side effects. (aspetjournals.org)
  • In addition to the molecular structures determined by X-ray crystallography, inversion barriers at the three-coordinated sulfur atoms have been determined by a coalescence method using diastereotopic C-3 and C-5 indacene carbon atoms as a 13 CNMR probe. (elsevierpure.com)
  • Herein, we describe a novel approach for the practical synthesis of tetrasubstituted thiophenes 8 . (beilstein-journals.org)
  • The synthesis and characterization of thermally stable monosubstituted thiophene 1-oxide and 1-imides stabilized by EMind (1,1,7,7-tetraethyl-3,3,5,5-tetramethyl-s-hydrindacen-4-yl) group on the 3-position are described. (elsevierpure.com)
  • Wardakhan W. W. A one-pot synthesis of thiophenes and their annulated derivatives with potential pharmaceutical interest / W. W. Wardakhan // Phosphorus Sulfur Silicon Relat. (edu.ua)
  • To avoid the possible oxidation of a free thiol group, a methylthio group was used as sulfur nucleophile, since the methyl group on sulfur could be removed under the reaction conditions by reaction with the iodide anion to give methyl iodide. (unical.it)
  • This International Standard specifies a method for the determination of thiol (mercaptan) sulfur in light distillates, such as gasolines and naphtha fractions, and middle distillate fuels, such as kerosines and gas oils, in the range of 0,000 3 % ( m/m ) to 0,0100 % ( m/m ) (3 mg.kg to 100 mg/kg). (energyinst.org)
  • Typical hydrocarbon quenching is negligible, making this newly designed SCD one of the most powerful techniques for sulfur speciation. (shimadzu.com)
  • Sulfolene;Sulfol-3-ene;1-Thia-3-cyclopentene 1,1-dioxide;NSC 48532;3-Sulfolene-D6;CCRIS 569;HSDB 2903;EINECS 201-059-7;BRN 0107004;UNII-Z6003L44MN;AI3-23457;DTXSID6021294;2,5-dihydrothiophene s,s-dioxide;Z6003L44MN;Butadiene-2,2,5,5-D4 sulfone;NSC-48532;NSC-56373;2,5-Dihydro-1-thiophene-1,1-dione;2,5-dihydro-1? (lookchem.com)
  • This chemical is also a convenient source of sulfur dioxide. (lookchem.com)
  • 8) Poly(3-hexyl)thiophene (P3HT) can be blended with fullerene derivatives (eg. (tcichemicals.com)
  • Further, when a different sulfur-containing compound was used, the chiral selectivity changed differently. (confex.com)
  • The thiophene moiety is considered a structural alert in molecular design in drug discovery, largely because several thiophene-containing drugs, including tienilic acid and suprofen, have been withdrawn from the market because of toxicities. (aspetjournals.org)
  • The results indicate the importance of including thiophene, sulfide, and sulfoxide chemistries within molecular asphalt models. (uri.edu)
  • On the other hand, some thiophene-based polymers exhibit a high energy level of the highest occupied molecular orbital (HOMO), because they are electron-rich. (tcichemicals.com)
  • A novel metabolic activation mechanism is proposed whereby the 2,5-diaminothiophene moiety undergoes oxidation to a 2,5-diimine thiophene reactive intermediate. (aspetjournals.org)
  • The disruption of formation of the 2,5-diimine reactive intermediate resulted in the elimination of glutathione conjugate formation both in vitro and in vivo and provided a rational approach to mitigating potential safety risks associated with this class of thiophenes in drug research and development. (aspetjournals.org)
  • In chemistry, Sulfur (S) , a chalcogen group member, is a reactive nonmetal element with the atomic weight of 32.066. (wellnessadvocate.com)
  • XANES measurements of sulfur chemistry during asphalt oxidation" by Michael L. Greenfield, Michael Byrne et al. (uri.edu)
  • One problem of the thiophene-based polymers is their sensitivity for electrochemical oxidation. (tcichemicals.com)
  • Curiosity's SAM instrument discovered thiophene (an organic molecule containing sulfur), shown here with its mass spectrum. (nasa.gov)
  • The glutathione molecule was attached to the thiophene ring, replacing the existing proton. (aspetjournals.org)
  • We propose that sulfur may selectively block active sites on Co particles through dynamic interactions among sulfur, hydrogen, carbon and Co metal particles. (confex.com)
  • The mechanism I am thinking of is the substitution of the chloro group with 2-mercaptoethanol, the N is electron withdrawing so there is a partial postitive charge at the carbon for the OH ion to attack, the hydrogen bonding from the OH on the 2-mercaptoethanol makes the sulfur a good leaving group, resulting in the product. (chemicalforums.com)
  • We are delighted to share with you a collection of articles from Materials Chemistry Frontiers to showcase the exciting and recent developments in the field of Lithium-Based Batteries, including lithium-ion batteries, lithium-sulphur batteries and lithium-air batteries. (rsc.org)
  • Recent research on organic electronics developed sulfur-containing polymers such as polythiophene. (tcichemicals.com)
  • The mechanism for this reaction is based on the formation of a sulfur ylide-like intermediate. (beilstein-journals.org)
  • The reaction was essentially a conjugate addition (that is, the Sulphur electrons attacking the back end of a C=C-C=O system), followed by in situ base-mediated cyclisation and dehydration to afford the fused thiophene system. (chemicalforums.com)
  • Thiophene ring system has certain stability to oxidant. (chemenu.com)
  • Scientists in Japan have discovered a simplified method to synthesize sulfur-based organic semiconductors more efficiently. (asianscientist.com)
  • A team led by Assistant Professor Yasutomo Segawa and Professor Kenichiro Itami of the Japan Science and Technology Agency-ERATO has succeeded in developing a simple and effective method for the formation of various thiophene-fused PAHs. (asianscientist.com)
  • The effects of high symmetry about sulfur and fast chemical exchange on 33s spectral line widths are discussed and illustrated. (cdc.gov)
  • Elemental analysis indicates that the sulfur content of the asphalt holds constant at 5 wt% during aging. (uri.edu)
  • I know that the first step should be the 2-mercaptoethanol replacing the Cl, and that the -OH on the 2-mercaptoethanol can H-bond with the sulfur to make it a good leaving group. (chemicalforums.com)
  • In the first chapter the technology of production of disulphide oil, substitutes (DMDS) and thiophene is discussed in detail, potential sources of raw materials are listed. (infomine.ru)
  • Projects for the production of thiophene have also been reviewed and its potential producer has been described. (infomine.ru)
  • Meanwhile, thiophene sulfur (C-S-C) as active sites played an auxiliary role. (bvsalud.org)
  • The main heterocyclic aroma chemicals are oxygen-, sulfur- and nitrogencontaining rings. (perfumerflavorist.com)
  • In particular, we have employed as substrates 1-(methylthio)-3-yn-2-ols, which, upon S-cyclization, demethylation, and alkoxycarbonylation, led to thiophene-3-carboxylic esters in one step, in alcohols as external nucleophile and solvents, and under 40 atm of a 4:1 mixture of CO-air (air being the source of oxygen, used as external oxidant). (unical.it)
  • The object of the study is disulphide oil, its substitute dimethyldisulphide (DMDS) and thiophene. (infomine.ru)
  • Sulfur-33, because of its low natural abundance, spin of 3/2, and large quadrupole moment, has been a much neglected nucleus in nmr as well as in other branches of spectroscopy. (cdc.gov)
  • The sixth chapter provides a forecast for the development of the Russian market of disulphide oil, substitutes (DMDS) and thiophene for the period up to 2025. (infomine.ru)