Reaction Of Elemental Sulfur Research Articles

Polymerization of aromatic hydrocarbons with sulfur

AbstractThe polymerization reactions of elemental sulfur with the polynuclear aromatic hydrocarbons pyrene and chrysene were studied. Heating the hydrocarbons with sulfur produces a series of sulfur‐containing oligomers in which the aromatic ring systems remain intact. Polymerization is effected through the dehydrogenative action of sulfur and leads to thermally stable five‐ or six‐membered heterocyclic ring systems. The major loss of sulfur during subsequent heat treatment occurs only at carbonization temperatures above 1000°C.

Identification and geochemical significance of some aromatic components of coal

The aromatic fraction of a Homestead, Kentucky, coal extract was analyzed by combined gas chromatography-mass spectrometry using glass capillary columns. The aromatic fraction was further analyzed by gas chromatography using sulfur specific flame photometric detection. Seventy-eight compounds were identified, some of which have been traced to their possible biological origins. Sulfur-containing aromatic compounds are thought to originate from reaction of elemental sulfur or pyrite with hydrocarbons.

Sulfur Exchange Reactions of Dialkyl Dithiophosphoric Acids and Their Derivatives with Elemental Sulfur

Contrary to the Miklukhin's report that dialkyl dithiophosphoric acid and its salts do not have an exchange reaction with elemental sulfur, it was found that such exchange reaction did occur under our experimental conditions.The reaction was the second order for the concentration of dialkyl dithiophosphoric acid (or its derivatives) and the first order for sulfur concentration. The rate of reaction depended on the structure of the reactant compounds and the solvents. The rate was very small in the solvents containing ethanol. The eight-membered ring sulfur decreased in the system during the reaction, though the total amount of sulfur was constant.From the above experimental facts, it was concluded that an amphoteric polysulfide ion was produced by the reaction of elemental sulfur and dialkyl dithiophosphoric acid (or its derivatives). Therefore, it was proposed that the sulfur exchange does not occur by a bimolecular reaction between dialkyl dithio-phosphoric acid (or its derivatives) and elemental sulfur, but the exchange of sulfur is accomplished by the reaction of the amphoteric polysulfide ions formed and the other acid molecules (or the other derivative molecules).

REACTION OF AROMATIC NITRO COMPOUNDS WITH ELEMENTAL SULFUR IN LIQUID AMMONIA AND AMINES

Abstract Aromatic nitro compounds were reduced with elemental sulfur in liquid ammonia and in amines, yielding the corresponding anilines. However, introduction of a substituent on the benzene ring or variation of the amine changed somewhat the pattern of this reaction. For example, 4-nitrotoluene (3) and 4-cyanonitrobenzene (6) were found to give not only the corresponding reduced products but also 4,4′-dicyanodiphenyl disulfide (10), formed by replacement of the nitro group, in addition to 4-cyanoaniline (9) in the reaction with elemental sulfur in liquid ammonia. Probable mechanisms of these reactions are discussed in the light of new knowledge on the similar reactions of elemental sulfur.

Zur Synthese phosphinkomplexierter d8-Metalltetrasulfide (Ni(II), Pd(II) und Pt(II)) mit Natriumpolysulfiden / On the Synthesis of Phosphine-Coordinated d8-Metal Tetrasulfides (Ni(II), Pd(II), and Pt(II)) with Sodium Polysulfides

Abstract A short literature survey on phosphine-coordinated d8-metal tetrasulfides is given. Different results have been reported for the reactions of elemental sulfur with Pt(PPh3)4 (1). The reaction of sodium polysulfides, Na2Sx, with the corresponding dihalides results in a clear-cut manner in the formation of the already known compounds tetrasulfidoethylenebis(diphenylphosphine)palladium(II) (6) and tetrasulfido-bis(triphenylphosphine)-platinum(II) (5), and the new compound tetrasulfido-ethylenebis(diphenylphosphine)-nickel(II) (13). Degradation reactions of [Pt(S5)3]2-(9) with triphenylphosphine, tri-p-tolylphosphine and ethylene-bis(diphenylphospbine) result in the formation of 5, and tetrasulfido-ethylenebis(diphenylphosphine)platinum(II) (4) and the new tetrasulfidobis( tri-p-tolylphosphine)platinum(II) (10). IR-spectra are reported.

Synthesis of Zinc O, O-diisobutyldithio [35S] phosphate, Using an Exchange Reaction of Elemental Sulfur [35S

Synthesis of zinc O, O-diisobutyldithio [35S] phosphate (ZDDP [35S]) was successfully carried out, using an exchange reaction between ammonium salt of O, O-diisobutyl-dithiophosphoric acid and elementary sulfur [35S]. The experimental tehnique and apparatus in this method are much simpler, therefore much safer, than the ordinary synthetic method where P235S5 is used. The ZDDP [35S] obtained was both chemically and radiochemically pure. The specific activity of the sulfur in ZDDP [35S] was 20.6% of that of the elementary sulfur [35S] used. According to this synthetic method, a satisfactorily high specific activity of ZDDP [35S], can be easily obtained.

A NEW TYPE OF PHOTOCHEMICAL ADDITION REACTION OF ELEMENTAL SULFUR TO OLEFINS

Abstract Photochemical reactions of elemental sulfur with several olefins were studied. Irradiation of a mixture of elemental sulfur and norbornylene with 3500 Å light afforded 3,4,5-trithiatricyclo[5.2.1.0]decane (1) and 2,3-epithionorbornane (2). Similarly, several thiane derivatives (4–6) were found to be formed by the photolysis of a mixture of cyclohexene and sulfur.

Introduction of sulphur into organic molecules via lithium triethylborohydride reduction of S8

Solutions in tetrahydrofuran of Li2S and Li2S2(or chemically equivalent species) are rapidly formed by reaction of elemental sulphur with appropriate stoicheiometries of LiEt3BH; subsequent addition of electrophiles affords sulphide or disulphide derivatives in high yields.

The Reaction of Elemental Sulfur with Organic Compounds. VI. 35S-Tracer Study of Aromatic Displacement Reaction of Thianthrene, Phenoxathiin, Dibenzothiophene and Their Oxidation Compounds by Sulfur

The Reaction of Elemental Sulfur with Organic Compounds. VI. 35S-Tracer Study of Aromatic Displacement Reaction of Thianthrene, Phenoxathiin, Dibenzothiophene and Their Oxidation Compounds by Sulfur

The Reaction of Elemental Sulfur with Organic Compounds, V. Reactions of Optically Active Sulfoximine with Elemental Sulfur and with Diphenyl Disulfide

The Reaction of Elemental Sulfur with Organic Compounds, V. Reactions of Optically Active Sulfoximine with Elemental Sulfur and with Diphenyl Disulfide

The Reaction of Elemental Sulfur with Organic Compounds. IV. The Reactions of N-Arenesulfonylsulfilimine and Sulfoximine with Sulfur and Diaryl Disulfide

Abstract The reactions of elemental sulfur and diaryl disulfide with the compounds bearing a semipolar S→N linkage were investigated. Elemental sulfur was found to react with N-arenesulfonylsulfilimine and sulfoximine affording the corresponding sulfide and the sulfoxide respectively. Diaryl disulfide also was found to undergo similar reactions with these compounds. In the reaction of diaryl disulfide with N-arenesulfonylsulfilimine, N,N-bis-(arylthio)arenesulfonamide was obtained as a main product besides the corresponding sulfide. The mechanisms of these reactions are discussed.

The reaction of elemental sulfur with organic compounds. III. A new type of aromatic displacement reaction by elemental sulfur; reaction with halo aromatics

The reaction of elemental sulfur with organic compounds. III. A new type of aromatic displacement reaction by elemental sulfur; reaction with halo aromatics

Isotopic composition of sulfur and sulfate produced by oxidation of FeS

Sulfate enriched in 32 S with respect to co-existent sulfur is found in the Orgeuil meteorite. Similar isotopic distributions can be effected with at least three laboratory procedures: (1) oxidation of FeS by traces of a strong oxidizing agent such as O 2 or HOOH in a generally reducing aqueous environment, (2) bacterial oxidation of sulfides, or (3) reaction of elemental sulfur with water followed by partial oxidation of the unequilibrated products. For many reasons, the first mechanism is attractive for explaining the 32 S/ 34 S distribution in the carbonaceous chondrites.

The Reaction of Elemental Sulfur with Organic Compounds. II. The Reaction of Dibenzyl Sulfide, Sulfoxide and Sulfone, and Their Related Dibenzyl Compounds

The Reaction of Elemental Sulfur with Organic Compounds. II. The Reaction of Dibenzyl Sulfide, Sulfoxide and Sulfone, and Their Related Dibenzyl Compounds

Carbon Disulfide Production by Reaction of Elemental Sulfur with Carbonized Lignite and Wood Charcoal

Carbon Disulfide Production by Reaction of Elemental Sulfur with Carbonized Lignite and Wood Charcoal

Phosphorus Nitrogen Chemistry. VI. Preparation and Properties of Thiophosphorus Tri-N-methylimide, P4S4N6(CH3)6

Abstract Thiophosphorus tri-N[sbnd]methylimide, P4N6(CH3)6, was prepared in high yield by the reaction of elemental sulfur and solid P4N6(CH3)6 at room temperature. Physical properties support a structure analogous to the cage structure for P4O6S4. Additional properties of the related compounds, P4N6(CH3)6 and As4N6(CH3)6, are reported. Comparison of proton n.m.r. spectra and mass spectral cracking patterns substantiates a common structural basis for these molecules.

Reactions of Elemental Sulfur. IV. Catalytic Effects in the Reaction of Sulfur with Triphenylphosphine

Reactions of Elemental Sulfur. IV. Catalytic Effects in the Reaction of Sulfur with Triphenylphosphine

Reactions of Elemental Sulfur. V. Catalytic Effects in the Conversion of Hexatomic to Octatomic Sulfur

Reactions of Elemental Sulfur. V. Catalytic Effects in the Conversion of Hexatomic to Octatomic Sulfur

Reaction of Elemental Sulfur and Mercaptobenzothiazole

Abstract One of the most important problems in the field of the physics and chemistry of rubber is that of vulcanization. Until now no single theory has been established, which elucidates the complex physico-chemical changes which occur during this process. Still more obscure has been the mechanism of the action of vulcanization accelerators, which, as is well known, not only reduce the time and the temperature of vulcanization, but also influence the physico-mechanical and chemical properties of the rubber. Most investigators have assumed that in the acceleration process a reaction with sulfur converts it to an active form which is capable of bringing about vulcanization at a lower temperature and at a greater rate, than with ordinary elemental sulfur in the absence of an accelerator. This point of view is based on the experimental fact that the vulcanization of rubber by sulfur dioxide and hydrogen sulfide, for example, which form sulfur in the nascent condition, proceeds rapidly even at room temperature. Investigators have also assumed that in the vulcanization process activation of sulfur in the presence of accelerators may occur by different mechanisms. It is possible that the accelerator, reacting with elemental sulfur, forms unstable intermediate compounds, which decompose with liberation of sulfur in an active form. The latter reacts with rubber, and the regenerated accelerator reacts again with elemental sulfur, etc. However, a different process is possible for the activation of elemental sulfur. By this second mechanism the unstable combination of accelerator and sulfur reacts directly with rubber without the formation of active sulfur. Both these mechanisms necessarily assume the formation of intermediate unstable combinations of the accelerator with sulfur. However, direct, experimentally-based demonstrations of such an interaction are lacking in the literature. There exist only theoretical hypotheses concerning the nature of the possible intermediate combination of the accelerator with sulfur. According to Ostromislensky's concepts, further developed by Bedford, such an intermediate compound has the character of a polysulfide. According to Bruni and Romani, this intermediate compound is a disulfide. As is well known, the disulfide theory was placed in doubt by Zaide and Petrov on the basis of data from the vulcanization of rubber in the presence of benzothiazolyl disulfide.

Reactions of Elemental Sulfur. I. The Uncatalyzed Reaction of Sulfur with Triarylphosphines1

ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTReactions of Elemental Sulfur. I. The Uncatalyzed Reaction of Sulfur with Triarylphosphines1Paul D. Bartlett and Garbis MeguerianCite this: J. Am. Chem. Soc. 1956, 78, 15, 3710–3715Publication Date (Print):August 1, 1956Publication History Published online1 May 2002Published inissue 1 August 1956https://doi.org/10.1021/ja01596a043RIGHTS & PERMISSIONSArticle Views1340Altmetric-Citations118LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (691 KB) Get e-Alerts Get e-Alerts