The i.r. and Raman spectra of methanesulfonyl chloride and methanesulfonyl chloride-d3 have been recorded in the liquid state, and consistent assignments of the fundamental frequencies of the two isotopic compounds have been given. The normal coordinate calculation based on a modified Urey—Brad...
Thermal analysis of the methanesulfonyl chloride (MSC)-water system reacting under both homogeneous and heterogeneous conditions has been performed by means of adiabatic calorimetry. The enthalpy of solution of methanesulfonyl chloride in water at 298 K (− 112 cal mol−1) and the enthalpy of the ...
Regioselective chlorination of cellulose is challenging due to its low reactivity, the small reactivity differences between cellulosic hydroxyl groups, and the high and diverse reactivity of most common chlorinating agents. Halogenation of cellulose affords useful precursors for subsequent nucle...
Raman and ir spectra were obtained and the frequencies assigned and normal coordinate analysis performed on the methyl esters of arsenic, methyl-arsonic and dimethylarsinic acid.
Techniques for the determination of trace element compounds at ppb1 and ppm levels (in contrast to the determination of the total element concentration) are a prerequisite for the study of the transformations of trace elements in biological systems and the interactions of trace element compounds...
The simultaneous determination of arsenic (As(III), MMAs, DMAs, As(V)) and selenium (Se(IV), Se(VI)) species has been carried out by three instrument combinations. High performance liquid chromatography (HPLC) is coupled with two independent atomic fluorescence spectrometers (AFS) supplied with ...
Methylation of inorganic arsenic to methylarsonic acid (MMA) and dimethylarsinic acid (DMA) has been considered to be the major pathway of inorganic arsenic biotransformation and detoxification. Comparative studies,in vivo,have demonstrated variation in the abilities of animals to methylate inor...
Raman and IR spectra of methylarsonic acid, CH3AsO3H2, trideuteromethylarsonic acid, CD3AsO3H2 and their anions in aqueous solution and the solid state are discussed. Some results of a general valence force field and a Urey-Bradley force field are reported.
Chlorodibromomethane, a trihalomethane found in water supplies after chlorination, was administered by gavage in corn oil to male and female Fischer 344/N rats and B6C3F1 mice in toxicity studies of 13 weeks and 2 years duration. Doses used in the 13-week study were 0, 15, 30, 60, 125, and 250 m...
At room temperature, the unstable-in-air hexagonal C60·2HCClBr2 solvate (a = 10.154(3) Å, c = 10.150(3) Å at 308 K) forms with a negative excess volume, and slowly transforms upon ageing at room temperature into a stable orthorhombic solvate, C60·1.5HCClBr2 (a = 23.009(5) Å, b = 12.649(6) Å, c...
Halocarbons including chloroform (CHCl3), trichloroethylene (C2HCl3), tetrachloroethylene (C2Cl4), chlorodibromomethane (CHBr2Cl) and bromoform (CHBr3) were measured in the Yellow Sea (YS) and the East China Sea (ECS) during spring 2011. The influences of chlorophyll a, salinity and nutrients on...
A number of behavioral parameters in male golden hamsters (Mesocricetus auratus) exposed to chlorodibromomethane (CDBM) were registered over a 10-day (day −9 to day 0) pretest period and a 14-day (day 1 to day 14) test period beginning at 8 weeks of age. Whereas the subchronically treated group ...
Urea nitrate (uronium nitrate, UN) is an improvised explosive that looks very much like sugar and is easily made from accessible starting materials, urea and nitric acid. During the last decade it has been frequently used by terrorists in the Israeli arena and in other countries as well. It is d...
Urea nitrate was found to be an inexpensive, acid-free, and safe nitrating agent that provides mononitration of phenols and substituted phenols in excellent yields with exclusive ortho-selectivity under microwave irradiation. Microwave assisted reactions reduced the reaction times substantially ...
The modern low-energy production processes of urea and ammonium nitrate (AN) are analysed and compared regarding to the natural resources consumption efficiency and GHG emissions generation. The comparison is based on the thermodynamically grounded minimum real attainable consumption of energy a...
Steam reforming of methanol over CuO/ZnO/Al2O3 nanocatalysts synthesized by ultrasound assisted urea-nitrates combustion method was investigated. Four kinds of nanocatalysts were fabricated and their characteristic properties were studied by XRD, FESEM, PSD, BET, EDX and FTIR analyses. Their phy...
In this study methods for the detection of trace levels of the improvised explosives urea nitrate and ammonium nitrate were developed using electrospray ionization with infusion. By using a non-aqueous solvent mixture containing 95% acetone with 5% 2-methoxyethanol we were able to preserve the u...
Aging and degradation of urea nitrate below the melting point, at 100 °C, was studied by using thermal analysis and spectroscopic methods including IR, Raman, 1H and 13C NMR techniques. It was found that urea nitrate was completely degraded after 72 h at 100 °C into a mixture of solids (69%) a...
Two aqueous monofuels composed of aqueous solutions of ammonia/ammonium nitrate and urea/ammonium nitrate have been suggested as feasible nitrogen-based hydrogen carriers. Such synthetic fuels can serve as long-term energy storage media, providing back-up power generation for intermittent renewa...
Temperature profiles and effluent concentrations were measured during combustion of aqueous urea and ammonium nitrate at pressures of 1–15 MPa. Pollutant levels decreased, while the combustion temperature showed a non-monotonic change with increasing pressure. Experimental temperature profiles ...
About|Contact|Cas|Product Name|Molecular|Country|Encyclopedia
Message|New Cas|MSDS|Service|Advertisement|CAS DataBase|Article Data|Manufacturers | Chemical Catalog
©2008 LookChem.com,License: ICP
NO.:Zhejiang16009103
complaints:service@lookchem.com Desktop View