Trisulfide

	Trisulfide In organic and organometallic chemistry, trisulfide is the functional group R-S-S-S-R. Examples include: * Diallyl trisulfide * Dimethyl trisulfide * Trisulfane (hydrogen trisulfide) Some inorganic compounds are also named trisulfides to reflect their stoichiometry. Examples include: * Antimony trisulfide * Arsenic trisulfide * Bismuth trisulfide * Dibismuth trisulfide * Diboron trisulfide * Diiron trisulfide * Molybdenum trisulfide Molybdenum trisulfide is an inorganic compound with the formula In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a ''chemical formula''. The informal use of the term ''formula'' ... * Phosphorus trisulfide {{chemistry index ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Arsenic Trisulfide Arsenic trisulfide is the inorganic compound with the formula . It is a dark yellow solid that is insoluble in water. It also occurs as the mineral orpiment (Latin: auripigmentum), which has been used as a pigment called King's yellow. It is produced in the analysis of arsenic compounds. It is a group V/VI, intrinsic p-type semiconductor and exhibits photo-induced phase-change properties. Structure occurs both in crystalline and amorphous forms. Both forms feature polymeric structures consisting of trigonal pyramidal As(III) centres linked by sulfide centres. The sulfide centres are two-fold coordinated to two arsenic atoms. In the crystalline form, the compound adopts a ruffled sheet structure. The bonding between the sheets consists of van der Waals forces. The crystalline form is usually found in geological samples. Amorphous does not possess a layered structure but is more highly cross-linked. Like other glasses, there is no medium or long-range order, but the first co-ordin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Dimethyl Trisulfide Dimethyl trisulfide (DMTS) is an organic chemical compound and the simplest organic trisulfide, with the chemical formula CH3SSSCH3. It is a flammable liquid with a foul odor, which is detectable at levels as low as 1 part per trillion. Occurrence Dimethyl trisulfide has been found in volatiles emitted from cooked onion, leek and other ''Allium'' species, from broccoli and cabbage, as well as from Limburger cheese, and is involved in the unpalatable aroma of aged beer and stale Japanese sake. It is a decomposition product of bacterial decomposition, including the early stages of human decomposition, and is a major attractant for blowflies looking for hosts. Dimethyl trisulfide along with dimethyl sulfide and dimethyl disulfide have been confirmed as volatile compounds given off by the fly-attracting plant known as dead-horse arum ('' Helicodiceros muscivorus''). These flies are attracted to the odor of fetid meat and help pollinate this plant. DMTS contributes to the foul odor ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Diboron Trisulfide Boron sulfide is the chemical compound with the formula B2S3. This polymeric material that has been of interest as a component of "high-tech" glasses and as a reagent for preparing organosulfur compounds. Like the sulfides of silicon and phosphorus, B2S3 reacts with water, including atmospheric moisture to release H2S. Thus, samples must be handled under anhydrous conditions. Like the boron oxides, B2S3 readily forms glasses when blended with other sulfides such as P4S10. Such glasses absorb lower frequencies of Infra-red energy relative to conventional borosilicate glasses. B2S3 converts ketones into the corresponding thiones. For example, the conversion of benzophenone to its thione proceeds as follows: : + 3 → + 3 In practice, B2S3 would be used in excess. Synthesis Among other methods Diboron Trisulfide can be obtained by the reaction of iron or manganese boride with hydrogen sulfide at temperatures of 300 °C. :2 FeB + 4 H2S → B2S3 + FeS + 4 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Diallyl Trisulfide Diallyl trisulfide (DATS), also known as Allitridin, is an organosulfur compound with the formula S(SCH2CH=CH2)2. It is one of several produced by the hydrolysis of allicin, including diallyl disulfide and diallyl tetrasulfide, DATS is one of the most potent. Biological applications DATS has been shown to selectively kill cancerous cells in the prostate and breast, leaving healthy cells unharmed. This effect is attributed to increased reactive oxygen species (ROS) within cancer cells, increased the number of cells that arrest in the G2 phase of mitosis, and promote an increase in caspase-3 activity. These effects appear to contribute to the apoptosis of cancer cells and a decrease in cancer cell proliferation. DATS can be metabolized by glutathione in red blood cells to form hydrogen sulfide (H2S). This conversion occurs at a consistent rate over a prolonged period of time, rendering DATS a good source of H2S. H2S is a cardioprotective agent that has antioxidant, anti-inflammato ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Trisulfane Trisulfane is the inorganic compound with the formula H2S3. It is a pale yellow volatile liquid with a camphor-like odor. It decomposes readily to hydrogen sulfide (H2S) and elemental sulfur. It is produced by distillation of the polysulfane oil obtained by acidification of polysulfide Polysulfides are a class of chemical compounds containing chains of sulfur atoms. There are two main classes of polysulfides: inorganic and organic. Among the inorganic polysulfides, there are ones which contain anions, which have the general formu ... salts.R. Steudel "Inorganic Polysulfanes H2Sn with n > 1" in Elemental Sulfur and Sulfur-Rich Compounds II (Topics in Current Chemistry) 2003, Volume 231, pp 99-125. References Hydrogen compounds Inorganic sulfur compounds {{inorganic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Antimony Trisulfide Antimony trisulfide (Sb2S3) is found in nature as the crystalline mineral stibnite and the amorphous red mineral (actually a mineraloid) metastibnite. It is manufactured for use in safety matches, military ammunition, explosives and fireworks. It also is used in the production of ruby-colored glass and in plastics as a flame retardant. Historically the stibnite form was used as a grey pigment in paintings produced in the 16th century. In 1817, the dye and fabric chemist, John Mercer discovered the non-stoichiometric compound Antimony Orange (approximate formula2 Sb2S3•Sb2O3), the first good orange pigment available for cotton fabric printing. Antimony trisulfide was also used as the image sensitive photoconductor in vidicon camera tubes. It is a semiconductor with a direct band gap of 1.8–2.5 eV. With suitable doping, p and n type materials can be produced. Preparation and reactions Sb2S3 can be prepared from the elements at temperature 500–900 °C: :2 Sb + 3 S � ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Bismuth Trisulfide Bismuth(III) sulfide () is a chemical compound of bismuth and sulfur. It occurs in nature as the mineral bismuthinite. Synthesis Bismuth(III) sulfide can be prepared by reacting a bismuth(III) salt with hydrogen sulfide: : 2 Bi3+ + 3 H2S → Bi2S3 + 6 H+ Bismuth (III) sulfide can also be prepared by the reaction of elemental bismuth and elemental sulfur in an evacuated silica tube at 500 °C for 96 hours. : 2 Bi + 3 S → Bi2S3 Properties Bismuth(III) sulfide is isostructural with stibnite (stibnite is one of the forms of antimony(III) sulfide). Bismuth atoms are in two different environments, both of which have 7 coordinate Bismuth atoms, 4 in a near planar rectangle and three more distant making an irregular 7-coordination group. It can react with acids to produce the odoriferous hydrogen sulfide gas. Bismuth(III) sulfide may be produced in the body by the reaction of the common gastrointestinal drug bismuth subsalicylate with naturally occurring ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Dibismuth Trisulfide Bismuth(III) sulfide () is a chemical compound of bismuth and sulfur. It occurs in nature as the mineral bismuthinite. Synthesis Bismuth(III) sulfide can be prepared by reacting a bismuth(III) salt with hydrogen sulfide: : 2 Bi3+ + 3 H2S → Bi2S3 + 6 H+ Bismuth (III) sulfide can also be prepared by the reaction of elemental bismuth and elemental sulfur in an evacuated silica tube at 500 °C for 96 hours. : 2 Bi + 3 S → Bi2S3 Properties Bismuth(III) sulfide is isostructural with stibnite (stibnite is one of the forms of antimony(III) sulfide). Bismuth atoms are in two different environments, both of which have 7 coordinate Bismuth atoms, 4 in a near planar rectangle and three more distant making an irregular 7-coordination group. It can react with acids to produce the odoriferous hydrogen sulfide gas. Bismuth(III) sulfide may be produced in the body by the reaction of the common gastrointestinal drug bismuth subsalicylate with naturally occurring ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Diiron Trisulfide Iron(III) sulfide, also known as ferric sulfide or sesquisulfide (), is one of the several binary iron sulfides. It is a solid, black powder that degrades at ambient temperature. Reactions () decays at a temperature over 20 °C into iron(II) sulfide (FeS) and elemental sulfur: : Fe2S3 → 2 FeS + S With hydrochloric acid it decays according to the following reaction equation:H. Roempp, ''Chemie'' (1997), S. 1099; : Fe2S3 + 4 HCl → 2 FeCl2 + 2 H2S + S Greigite Greigite, with the chemical formula , is a mixed valence compound Mixed valence complexes contain an element which is present in more than one oxidation state. Well-known mixed valence compounds include the Creutz–Taube complex, Prussian blue, and molybdenum blue. Many solids are mixed-valency including in ... containing both Fe(III) and Fe(II). It is the sulfur equivalent of the iron oxide magnetite (Fe3O4). As established by X-ray crystallography, the S anions form a cubic close-packed lattice, an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Molybdenum Trisulfide Molybdenum trisulfide is an inorganic compound with the formula In science, a formula is a concise way of expressing information symbolically, as in a mathematical formula or a ''chemical formula''. The informal use of the term ''formula'' in science refers to the general construct of a relationship betwee ... MoS3. References Molybdenum(VI) compounds Sulfides {{Inorganic-compound-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]