Trisulfides

The reaction of butadiene with sulfur gives the disulfide 112, cyclic sulfide 113, and macrocyclic mono- and trisulfides 114 and 1I5[105]. 

Oldhamite, see Calcium sulfide Opal, see Silicon dioxide Orpiment, see Arsenic trisulfide Oxygen powder, see Sodium peroxide... 

A direct descendant of these matches is the nontoxic modem double-tipped strike-anywhere (SAW), the large "kitchen" match version, or the smaller "peimy box" variety. It is based on the invention of two Frenchmen, Henri SAvnne and Fmile David Cahen, who used the nonpoisonous compound tetraphosphoms trisulfide, P4S3, as a phosphoms substitute and acquired a U.S. patent in 1898. 

Properties and Reactions. Phosphorus combines with sulfur to form the binary tetraphosphoms trisulfide [1314-85-8] (phosphoms sesquisulfide), P4S2, (1) tetraphosphoms pentasulfide [12137-70-1] ( )j tetraphosphoms heptasulfide [12037-82-0] P) and phosphoms(V)... 

Titanium disulfide can also be made by pyrolysis of titanium trisulfide at 550°C. A continuous process based on the reaction between titanium tetrachloride vapor and dry, oxygen-free hydrogen sulfide has been developed at pilot scale (173). The preheated reactants ate fed iato a tubular reactor at approximately 500°C. The product particles comprise orthogonally intersecting hexagonal plates or plate segments and have a relatively high surface area (>4 /g), quite different from the flat platelets produced from the reaction between titanium metal and sulfur vapor. The powder, reported to be stable to... 

Titanium trisulfide [12423-80-2], TiS, a black crystalline soHd having a monoclinic stmcture and a theoretical density of 3230 kg/m, can be prepared by reaction between titanium tetrachloride vapor and H2S at 480—540°C. The reaction product is then mixed with sulfur and heated to 600°C ia a sealed tube to remove residual chlorine. Sublimatioa may be used to separate the trisulfide (390°C) from the disulfide (500°C). Titanium trisulfide, iasoluble ia hydrochloric acid but soluble ia both hot and cold sulfuric acid, reacts with concentrated nitric acid to form titanium dioxide. 

Tungsten trisulfide [12125-19-8] chocolate-brown powder, slightly soluble in cold water, but readily forming a colloidal solution in hot... 

Antimony trioxide and sodium antimonate are added to specialty glasses as decolorizing and fining agents, and are used as opacifiers in porcelain enamels. Antimony oxides are used as white pigments in paints, whereas antimony trisulfide and pentasulfide yield black, vermilHon, yeUow, and orange... 

Common methods of preparation include direct combination of metallic antimony with air or oxygen, roasting of antimony trisulfide, and alkaline hydrolysis of an antimony ttihafide and subsequent dehydration of the resulting hydrous oxide when heated too vigorously in air, some of the Sb(III) is converted to Sb(V). 

Antimony Trisulfide. Antimony(III) sulfide (antimony sesquisulftde) [1345-04-6] SbS, exists as a black crystalline soHd, stibnite [1317-86-8] and as an amorphous red to yeUow-orange powder. Stibnite melts at 550°C and has Ai i° 298 175 kJ/mol (—41.8 kcal/mol)) A°29g, 182 J/(182 mol-K) [43.5 cal/(43.5 mol-K)] for the amorphous soHd AH° 298 1 147 kJ/mol (—35.1 kcal/mol) (38). The crystal stmcture of stibnite contains two distiucdy different antimony sites and consists of two parallel Sb S chains that are linked together to form cmmpled sheets (two per unit cell). 

Amorphous Sb2S2 can be prepared by treating an SbQ solution with 442S or with sodium tliiosulfate, or by heating metallic antimony or antimony trioxide with sulfur. Antimony trisulfide is almost iasoluble ia water but dissolves ia concentrated hydrochloric acid or ia excess caustic. In the absence of air, Sb2S2 dissolves ia alkaline sulfide solutions to form the tliioantimonate(III) ion [43049-98-5], SbS 2, in the presence of air the tetratliioantimonate(V) ion [17638-29-8], SbS , is formed. The lemon-yellow crystalline salt, Na SbS 94420, known as Schhppe s salt [1317-86-8], contains the tetrahedral tetratliioantimonate(V) ion. 

Antimony trisulfide is used ia fireworks, ia certain types of matches, as a pigment, and ia the manufacture of mby glass. 

Bismuth trisulfide has been used as a high temperature lubricant and has been of interest for its photo- and thermoelectric properties. 

Although the polysulfur macrocycles became more interesting to the scientific community after Pedersen s report of the crown compounds (see Chap. 1), examples of such structures may be found in the literature dating back some time. The first report of a macrocyclic polysulfide appears to be that by Ray who found in 1920 that when 1,2-dimercaptoethane and 1,2-dibromoethane were heated with alcoholic potassium hydrogen sulfide as shown in Eq. (6.2), triethylene trisulfide (2) and a substance presumed to be triethylene tetrasulfide (3) could be isolated. 

Perfluoroisobutylene and potassium sulfide give 2,4-bis[hexafluoroisopro-pylidene]-l,3-dithietane and a small amount of the bis(perfluoro-tcrr-butyl)trisul-fide. The trisulfide is the result of a reaction of the nascent perfluoro-rerr-butyl carbanion with sulfur. The same products in different yields are obtained with sulfur and cesium fluoride [i] (equation 2). 

Of the many molybdenum sulfides which have been reported, only MoS, M0S2 and M02S3 are well established. A hydrated form of the trisulfide of somewhat variable composition is precipitated from aqueous molybdate solutions by H2S in classical analytical separations of molybdenum, but it is best prepared by thermal decomposition of the thiomolybdate, (NH4)2MoS4. MoS is formed by heating the calculated amounts of Mo and S in an evacuated tube. The black M0S2, however, is the most stable sulfide and, besides being the principal ore of Mo,... 

Synthesis, properties, and reactions of cyclic trisulfides and their oxides 980PP551. 

Antimon-saure, /. antimonic acid, -saureanhy-drid, n. antimonic anhydride, antimony pent-oxide. -silber, n. antimonial silver, dyscrasite. -silberblende,/. pyrargyrite. -silberglanz, m. stephanite. -spiegel, m. antimony mirror, -sulfid, n. antimony sulfide, specif, antimony pentasulfide, antimony(V) sulfide, -sulfiir, n. antimony trisulfide, antimony(III) sulfide, -yerblndung,/. antimony compound, -wasser--stoff, m. antimony hydride, stibine. -weiss, n. antimony white (Sb Oa). -zinnober, m. kermes mineral. 

Arsen-saure, /, arsenic acid, -silber, n, silver arsenide, -silberblende,/, proustite, -spiegel, m. arsenic mirror, -suifid, n, arsenic sulfide, esp. the pentasulfide. -sulfur, n. arsenic trisulfide, arsenic(III) sulfide, -iir, n, (-ous) arsenide, -verbindung, /. arsenic compound, -vergiftung, /. arsenic poisoning, -wasser-stoff, m. arsenic hydride, arseniuretted hydrogen (specif, arsine, AsHa). -zink, n. zinc arsenide. 

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