ChemInform Abstract: Spectroscopic and Magnetic Properties of FeOCl Intercalated with Organosulfur Electron Donors.
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Abstract New intercalation compounds of the organic electron donors (I)‐(III) with the host FeOCl are prepared by direct reaction of solutions of the tetrathiolene molecules with solid FeOCl.Keywords:
Organosulfur compounds
Organosulfur compounds
Fraction (chemistry)
Mass fraction
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Garlic (Allium sativum L.) is rich in biologically active organosulfur compounds. Although intact garlic cloves contain a limited number of organosulfur compounds, such as alliin, methiin and γ-glutamyl-S-alk(en)yl-cysteines, processing initiates a cascade of chemical transformation reactions. Allicin is one of the well-known transformation compound, however, it is highly unstable and reactive, and quickly decomposes into other organosulfur compounds including alk(en)ly-polysulfides, ajoenes and vinyldithiins. Thus, allicin is a transient compound and likely only its transformation compounds contribute to the health benefits of garlic. Recently, biological activities of water-soluble organosulfur compounds derived from garlic, such as S-allyl-L-cysteine and S-allylmercapto-L-cysteine, have become the center of attention because they are stable, odorless and safe. Studies on structure-activity relationships have revealed that the S-allyl group plays an important role in the pharmacological activities of organosulfur compounds derived from garlic. Further, consumption of garlic shows feasibility to prevent cancer and affect immunomodulation or enhancement of the immune systems.
Organosulfur compounds
Alliin
Polysulfide
Diallyl disulfide
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Organosulfur compounds have long been recognized as important antioxidants for the preservation of petroleum-derived products. It has also been suggested that the health benefits of garlic and related plant species can be ascribed to the radical-trapping antioxidant activity of some of their unique organosulfur constituents, such as allicin. This account highlights our efforts to elucidate the radical-trapping antioxidant mechanisms of allicin and related plant-derived organosulfur compounds as well as the organosulfur compounds used to preserve commercial and industrial products.
Organosulfur compounds
Sulfenic acid
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Key to understanding the involvement of organosulfur compounds in a variety of radical chemistries, such as atmospheric chemistry, polymerization, pyrolysis, and so forth, is knowledge of their thermochemical properties. For organosulfur compounds and radicals, thermochemical data are, however, much less well documented than for hydrocarbons. The traditional recourse to the Benson group additivity method offers no solace since only a very limited number of group additivity values (GAVs) is available. In this work, CBS-QB3 calculations augmented with 1D hindered rotor corrections for 122 organosulfur compounds and 45 organosulfur radicals were used to derive 93 Benson group additivity values, 18 ring-strain corrections, 2 non-nearest-neighbor interactions, and 3 resonance corrections for standard enthalpies of formation, standard molar entropies, and heat capacities for organosulfur compounds and organosulfur radicals. The reported GAVs are consistent with previously reported GAVs for hydrocarbons and hydrocarbon radicals and include 77 contributions, among which 26 radical contributions, which, to the best of our knowledge, have not been reported before. The GAVs allow one to estimate the standard enthalpies of formation at 298 K, the standard entropies at 298 K, and standard heat capacities in the temperature range 300-1500 K for a large set of organosulfur compounds, that is, thiols, thioketons, polysulfides, alkylsulfides, thials, dithioates, and cyclic sulfur compounds. For a validation set of 26 organosulfur compounds, the mean absolute deviation between experimental and group additively modeled enthalpies of formation amounts to 1.9 kJ mol(-1). For an additional set of 14 organosulfur compounds, it was shown that the mean absolute deviations between calculated and group additively modeled standard entropies and heat capacities are restricted to 4 and 2 J mol(-1) K(-1), respectively. As an alternative to Benson GAVs, 26 new hydrogen-bond increments are reported, which can also be useful for the prediction of radical thermochemistry.
Organosulfur compounds
Thermochemistry
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Organosulfur compounds
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Organosulfur compounds
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Carbon fibers
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By incorporating TI into PAN, an organosulfur is fabricated with high S&Se loading, excellent kinetics and robust structure. The organosulfur achieves outstanding composites capacity, ultralong-lifespan and high-rate capability in Li/Na–S batteries.
Organosulfur compounds
Life span
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Superhigh organosulfur coal has received considerable attention chemically as well as geologically,because from it we could get much useful chemical information for removing organosulfur from coal.By studying it, we could also find out the factors af-
Organosulfur compounds
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Structure and Bonding in Sulfur and Organosulfur Compounds. Synthesis of Organosulfur Compounds. Structure-Chemical Relationships in Organosulfur Compounds. Thiols, Sulfides and Sulfenic Acids. Sulfoxides and Sulfones. Sulfonium and Oxosulfonium Salts, Sulfur Ylides and Sulfenyl Carbanions. Sulfinic Acids, Sulfonic Acids and Derivatives Sulfenes. Thiocarbonyl Compounds. Miscellaneous Organosulfur Compounds. The Utility of Organosulfur Compounds in Organic Synthesis. Uses of Organosulfur Compounds. Index.
Organosulfur compounds
Sulfonium
Sulfenic acid
Carbanion
Sulfone
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