نتایج جستجو برای: synthesis of triethyl propargyl ammonium bromide
تعداد نتایج: 21192702 فیلتر نتایج به سال:
In the title compound, (C(10)H(24)N)[FeCl(4)], no classical hydrogen bonds are observed. The butyl-triethyl-ammonium cations inter-act with the tetra-hedral [FeCl(4)](-) anion through weak C-H⋯Cl inter-actions, forming a three-dimensional network.
A novel, efficient, convenient and environmentally friendly approach for the synthesis of nitriles and imines from primary amines has been developed. Using commercially available red copper as the catalyst, ammonium bromide as the co-catalyst and molecular oxygen as the sole oxidant, nitriles and imines can be afforded in high yields through benzylic oxidation.
The excited state decay of the hydrocarbon radicals ethyl, C(2)H(5); propargyl, C(3)H(3); and benzyl, C(7)H(7) was investigated by femtosecond time-resolved photoionization. Radicals were generated by flash pyrolysis of n-propyl nitrite, propargyl bromide, and toluene, respectively. It is shown that the 2 (2)A(') (3s) Rydberg state of ethyl excited at 250 nm decays with a time constant of 20 fs...
In this communication, we present the ability of water and a protic ionic liquid, triethyl ammonium phosphate (TEAP) to act as refolding additives for the urea-induced chemical denaturated state of the two enzymes, α-chymotrypsin and succinylated Con A. We show that the enzymatic activity is regained and in certain circumstances enhanced.
The reaction between benzyl-triethyl-ammonium chloride and dimethyl-tin dichloride yields the title salt, [(C(6)H(5)CH(2))(C(2)H(5))(3)N](2)[SnCl(6)]. The Sn(IV) atom, located on a center of inversion, exists in an octa-hedral coordination environment. The cation links with the anion via weak C-H⋯Cl hydrogen bonding.
heteropoly acids (hpa) and their salts have advantages as catalysts which make them both economically and environmentally attractive, strong br?nsted acidity, exhibiting fast reversible multi-electron redox transformations under rather mild conditions, very high solubility in polar solvents, fairly high thermal stability in the solid states, and efficient oxidizing ability, so that they are imp...
the synthesis of functionalized 2-oxo-2h-coumarin derivatives has been studied by a one-pot reaction of o-hydroxybenzaldehyde, ethyl 2-bromoacetate and triphenylphosphine in the presence of catalytic amount of triethyl amine in etoac, water or under solvent free conditions. we have found the best results obtained under solvent free condition.
in this research, the magnetite nanoparticles (fe304) were prepared by coprecipitation of fe3+ andfe solution in alkaline medium. two kinds of surfactants, cetyl tri methyl ammonium bromide(ctab) and cetyl pyridinum chloride (cpc) were used in the synthesis. fe304 nanoparticles werecoated with human serum albumin (hsa) and bovine serum albumin (bsa). characteristics ofcoated magnetic nanopartic...
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