Results 1 to 10 of about 53,190 (206)

Elemental Sulfur-Mediated Aromatic Halogenation [PDF]

The Journal of Organic Chemistry, 2023
A method for aromatic halogenation using a combination of elemental sulfur (S8) and N-halosuccinimide has been developed. A catalytic quantity of elemental sulfur (S8) with N-bromosuccinimide (NBS) and N-chlorosuccinimide (NCS) effectively halogenated less-reactive aromatic compounds, such as ester-, cyano-, and nitro-substituted anisole derivatives ...
Junpei, Matsuoka, Yuna, Yano, Yuuka, Hirose, Koushi, Mashiba, Nanako, Sawada, Akira, Nakamura, Tomohiro, Maegawa   +6 more
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Sulfuration of dienes with elemental sulfur

Tetrahedron Letters, 1997
Abstract Elemental sulfur reacts with conjugated 1,3-dienes to deliver cyclic di- and polysulfides; the reaction proceeds without any activation other than heat. Treatment of cyclic polysulfide products with triphenylphosphine cleanly converts them to the corresponding disulfide in good overall yield.
Andrzej Z. Rys, David N. Harpp
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The Action of Sulfur Trioxide on Elemental Sulfur

Zeitschrift für anorganische und allgemeine Chemie, 1971
AbstractThe reaction between SO3 and elemental sulfur to form SO2 proceeds with maximum rate at 70°C, The decrease in rate at higher temperature is supposed to be due to the dissolution of SO3 in molten sulfur then its decomposition according to: SO3 → SO2 + 1/2 O2.
F. Habashi, R. Dugdale
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Effect of Elemental Sulfur, Gypsum, and Elemental Sulfur Coated Fertilizers, on the Availability of Sulfur to Rice

Journal of Plant Nutrition, 2007
ABSTRACT Rice crops throughout the world are becoming increasingly affected by sulfur (S) deficiency as the use of S-free fertilizers increases. Sulfur additions, as coatings, to fertilizers such as urea (U), di-ammonium phosphate (DAP), mono-ammonium phosphate (MAP), and triple superphosphate (TSP) offer a way to introduce S back into these ...
Navida Yasmin, Graeme Blair, Ray Till
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The purification of elemental sulfur

Journal of Materials Research, 1992
Sulfur has been purified by a dynamic pyrolysis procedure that takes into account the unique viscosity-temperature relationship of the liquid. An apparatus is described that incorporates gas-bubbling and rocking to overcome diffusion-limited kinetics. For the first time, a mechanism is proposed for the pyrolytic purification of sulfur based upon Carsul
Sherman Susman, S. Clark Rowland, Kenneth J. Volin   +2 more
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Modelling of sulfur oxidation from elemental sulfur

Plant and Soil, 1993
An elemental S oxidation model has been developed which combines a maximum S release rate with modifiers for temperature and soil moisture conditions. This model has been combined with a pasture growth and CNSP nutrient cycling model to match S oxidation rate to pasture S demand. In two Southern Australian enviroments, 100μm elemental S was superior to
Graeme J. Blair, Rod D. B. Lefroy, M. Dana, G. C. Anderson   +3 more
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Thermal analysis of sulfurization of polyacrylonitrile with elemental sulfur

Journal of Thermal Analysis and Calorimetry, 2008
Thermal analysis of sulfurization of polyacrylonitrile (PAN) with elemental sulfur was investigated by thermogravimetry and differential thermal analysis of the mixture of polyacrylonitrile and elemental sulfur up to 600°C. Due to the volatilization of sulfur, the different heating rate (10 and 20 K min−1) and different mixture proportion of ...
X. -M. He, L. Wang, W. -H. Pu, J. -G. Ren, W. Wu, C. -Y. Jiang, C. -R. Wan   +6 more
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Reaction of elemental sulfur in ethylenediamine with sulfur mustard

Journal of Sulfur Chemistry, 2005
Reaction of elemental sulfur in ethylenediamine with 1,1-thiobis(2-chloroethane) or sulfur mustard, the potent chemical warfare agent has been studied. The optimum conditions for the reaction are established for the complete conversion of sulfur mustard into non-toxic products.
K. Ganesan, R. C. Malhotra, K. Sekhar
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ChemInform Abstract: Sulfuration of Dienes with Elemental Sulfur.

ChemInform, 1997
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a “Full Text” option. The original article is trackable via the “References” option.
A. Z. RYS, D. N. HARPP
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Sulfur: Not a “Silent” Element Any More

ChemInform, 2006
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
openaire   +2 more sources