Sulfides benzene

Rhodococcus sp. Strain T09 A Rhodococcus strain T09 was isolated by enrichment on media-containing BT. The desulfurization mechanism of this organism was reported to be similar to Gordonia sp. 213E due to the observation of similar intermediates however, the substrate specificity was different. The strain T09 could use 2-methyl, 3-methyl and 5-methyl BT apart from BT as sole source of sulfur for growth, but not 7-methyl or ethyl derivatives. Additionally, it could also use methyl thiobenzothiazole, marcaptobenzothiazole, as well as benzene sulfide, benzene sulfonate, biphenyl sulfinate, dimethyl sulfate, dimethyl sulfone, dimethyl sulfide, methane sulfonic acid, thiophene, and taurine as sole sulfur sources. However, it could not grow on DBT or DBT sulfone. 

Bromovinyl phenyl sulfide Benzene, [(l-bromoethenyl)thio]- (10) (80485-53-6) Phenyl vinyl sulfide Sulfide, phenyl vinyl (8) Benzene, (ethenylthio)- (9) (1822-73-7)... 

Aluminum powder, Carbon tetrachloride Aluminum powder, Tetrachlorethylene CNTA, Hydrogen sulfide. Benzene, Lead 11 hydroxide Mercury-ll-nitrate, Sodium azide Mercury, Nitric acid. Alcohol Mercury, Nitric acid. Ethanol Ammonia, Mercury oxide. Nitric acid Nitric acid. Methylene diformamide. Acetic anhydride. Formic acid. Benzene... 

CNTA, Hydrogen sulfide. Benzene, Lead-II-hydroxide... 

One of the primary reactions of ionizing radiation with saturated fatty acids is decarboxylation and alkane formation (2). Dimers tend to be produced by reaction of ionizing radiation with unsaturated fatty acids (2). When meats are irradiated C -C 7 n-alkanes, C2-C17 n-alkenes, and C4-Cg iso-alkanes are the predominant products from the lipid fraction (10), Irradiation of the lipoprotein fraction of meat results in the formation of the following volatile compounds Ci-C 7 n-alkanes, C2-C1J n-alkenes, dimethyl sulfide, benzene, and toluene (10). 

SULFIDE SYNTHESIS BENZYL SULFIDE (Benzene, l,l-[thiobis(tnethylene)]bis-)... 

The Boublik-Alder-Chen-Kreglewski (henceforth referred to as BACK) equation so far has been successfully applied to calculate the residual properties of sulfur dioxide, hydrogen sulfide, benzene, naphthalene, tetralin, cis- and trans-decalin, furan, and tetrahydrofuran (3,4). 

The analysis starts by ordering the components by composition, as given in Table 7.14. The first split suggested is the removal of the last three trace components hydrogen sulfide, benzene, and chloro-ethane. This split would correspond to the second heuristic in Table 7.12 remove troublesome trace impurities. The appropriate selector is of purification type. Four methods could be considered chemical absorption, catalytic conversion, molecular sieve adsorption and physical adsorption. 

Perng [5] also used stepwise Py-GC-MS and TGA-MS techniques in a study of the mechanisms and kinetics of the thermal decomposition characteristics of polyphenylene sulfide at various temperatures between ambient and 900 "C. The major decomposition products were benzene thiol, hydrogen sulfide, benzene and carbon disulfide always being the dominating component. 

Pb-tetraacetate added gradually with stirring at room temp, to a soln. of N,N-pentamethylenesulfamide in dimethyl sulfide-benzene, and stirring continued ca. 2 hrs. until the color of the Pb-tetraacetate has disappeared N,N-pentamethyl-enesulfamoyldimethylsulfilimine. Y 75%. F. e. s. M. Okahara, K. Matzunaga, and S. Komori, Synthesis 1972, 203. 

Acetone Acrylonitrile Ammonium fluoride Ammonium sulfide Benzene Benzoic acid Benzyl alcohol Bromobenzene Butyric acid Carbon tetrachloride Carbon disulfide Carbolic acid... 

The high degree of crystallization and the thermal stability of the bond between the benzene ring and sulfur are the two properties responsible for the polymer s high melting point, thermal stability, inherent flame retardance, and good chemical resistance. There are no known solvents of poIy(phenyIene sulfide) that can function below 205°C. 

Borane—dimethyl sulfide complex (BMS) (2) is free of these inconveniences. The complex is a pure 1 1 adduct, ca 10 Af in BH, stable indefinitely at room temperature and soluble in ethers, dichioromethane, benzene, and other solvents (56,57). Its disadvantage is the unpleasant smell of dimethyl sulfide, which is volatile and water insoluble. Borane—1,4-thioxane complex (3), which is also a pure 1 1 adduct, ca 8 Af in BH, shows solubiUty characteristics similar to BMS (58). 1,4-Thioxane [15980-15-1] is slightly soluble in water and can be separated from the hydroboration products by extraction into water. 

The reaction is complete in about 15 hours, as indicated by the formation of a white precipitate of phenyhnercuric s A ide[20333-30-6] when sulfide is added to an ammoniacal solution of the reaction mixture. The product is isolated after distillation of excess benzene and acetic acid. 

The earliest reported reference describing the synthesis of phenylene sulfide stmctures is that of Friedel and Crafts in 1888 (6). The electrophilic reactions studied were based on reactions of benzene and various sulfur sources. These electrophilic substitution reactions were characterized by low yields (50—80%) of rather poorly characterized products by the standards of 1990s. Products contained many by-products, such as thianthrene. Results of self-condensation of thiophenol, catalyzed by aluminum chloride and sulfuric acid (7), were analogous to those of Friedel and Crafts. 

Rhenium oxides have been studied as catalyst materials in oxidation reactions of sulfur dioxide to sulfur trioxide, sulfite to sulfate, and nitrite to nitrate. There has been no commercial development in this area. These compounds have also been used as catalysts for reductions, but appear not to have exceptional properties. Rhenium sulfide catalysts have been used for hydrogenations of organic compounds, including benzene and styrene, and for dehydrogenation of alcohols to give aldehydes (qv) and ketones (qv). The significant property of these catalyst systems is that they are not poisoned by sulfur compounds. 

The heavy metal salts, ia contrast to the alkah metal salts, have lower melting points and are more soluble ia organic solvents, eg, methylene chloride, chloroform, tetrahydrofiiran, and benzene. They are slightly soluble ia water, alcohol, ahphatic hydrocarbons, and ethyl ether (18). Their thermal decompositions have been extensively studied by dta and tga (thermal gravimetric analysis) methods. They decompose to the metal sulfides and gaseous products, which are primarily carbonyl sulfide and carbon disulfide ia varying ratios. In some cases, the dialkyl xanthate forms. Solvent extraction studies of a large number of elements as their xanthate salts have been reported (19). 

These effects can be attributed mainly to the inductive nature of the chlorine atoms, which reduces the electron density at position 4 and increases polarization of the 3,4-double bond. The dual reactivity of the chloropteridines has been further confirmed by the preparation of new adducts and substitution products. The addition reaction competes successfully, in a preparative sense, with the substitution reaction, if the latter is slowed down by a low temperature and a non-polar solvent. Compounds (12) and (13) react with dry ammonia in benzene at 5 °C to yield the 3,4-adducts (IS), which were shown by IR spectroscopy to contain little or none of the corresponding substitution product. The adducts decompose slowly in air and almost instantaneously in water or ethanol to give the original chloropteridine and ammonia. Certain other amines behave similarly, forming adducts which can be stored for a few days at -20 °C. Treatment of (12) and (13) in acetone with hydrogen sulfide or toluene-a-thiol gives adducts of the same type. 

Diphenyl sulfide can best be prepared by treating benzene and aluminum chloride with sulfur chloride, sulfur dichloride, or sulfur. In addition to diphenyl sulfide there are found traces of thiophenol and varying amounts of thianthrene. 

Compounds 15 can be prepared either by acylation of bis(o-aminophenyl) ditelluride (88KGS276 89KGS120) or by reduction of A -acyl-2-trichlorotelluro-benzenes with sodium sulfide (88MI1). 

A heterocyclic ring may be used in place of one of the benzene rings without loss of biologic activity. The first step in the synthesis of such an agent starts by Friedel-Crafts-like acylation rather than displacement. Thus, reaction of sulfenyl chloride, 222, with 2-aminothiazole (223) in the presence of acetic anhydride affords the sulfide, 224. The amine is then protected as the amide (225). Oxidation with hydrogen peroxide leads to the corresponding sulfone (226) hydrolysis followed by reduction of the nitro group then affords thiazosulfone (227). ... 

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