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Anhydrous FeCl

Anhydrous FeF is prepared by the action of Hquid or gaseous hydrogen fluoride on anhydrous FeCl (see Iron compounds). FeF is insoluble in alcohol, ether, and ben2ene, and sparingly soluble in anhydrous HF and water. The pH of a saturated solution in water varies between 3.5 and 4.0. Low pH indicates the presence of residual amounts of HF. The light gray color of the material is attributed to iron oxide or free iron impurities in the product. [Pg.202]

Beckmann rearrangement of ketoximes is achieved efficiently with anhydrous FeCls in the absence of solvent. The rearrangement was selective, producing only one amide isomer in usually good yield. [Pg.408]

A simple, convenient and efficient protocol for the electrophilic thiocyanation of indoles with ammonium thiocyanate using anhydrous FeCls as an inexpensive and readily available catalyst was developed <2005S0961>. The reaction went to completion within 3 h at room temperature in dichloromethane and the product, for example, 177-indol-3-yl thiocyanate 790 (R R, R = H), was obtained in 92% yield (Equation 192). [Pg.163]

The method is essentially the same as that described in synthesis A. The quantities of bis(trimethylsilyl)amine (0.10 mole) and butyllithium (0.093 mole) are again used, but the solvent is 100 mL of dry benzene (sodium-dried and distilled from calcium hydride). The addition of the anhydrous FeCls (9.8 g, 0.06 mole) leads to a slight warming of the reaction mixture. After 24 hours of stirring at room temperature, by which time the solution has assumed a dark-green coloration, the contents are briefly heated to reflux with an infrared lamp and the mixture is filtered. Concentration of the filtrate produces a mass of dark-green needle crystals, which are filtered, washed with a small amount of cold benzene, pumped dry, and sealed into ampules under vacuum. The yield of tris-[bis(trimethylsilyl)amido]iron(III) is about 10 g (62%). Satisfactory analyses have not been obtained due to this compound s high reactivity to air and moisture. [Pg.119]

The starting anhydrous FeCls is prepared from Fe and Clg. The CI3 is then displaced by means of a stream of very dry Ng, and... [Pg.1491]

Nanocomposites based on aluminum oxide, poly(pyrrole) (PPY), and PVK can be prepared by precipitating PVK in a suspension of PPY-coated aluminum oxide particles.A PPY/AI2O3 composite is added to an aqueous slurry of aluminum oxide powder, p5nrole, and anhydrous FeCls. [Pg.12]

FeCls-impregnated films of poly(vinylacetate) (PVA) are cast in polyethylene Petri dishes from solutions containing PVA (750 mg) and anhydrous FeCls (250 mg, i.e. 1.54 mmol) in 20 mL THF. The films are first dried under vacuum in a desiccator. The cast films are then dried at 60 °C in vacuum for 48 h. The FeCls-impregnated films are then dipped into aqueous solutions of pyrrole (5.8 mmol, 20 mL) and kept immersed in the solution for times ranging from 0.5 to 24h. The films are then withdrawn, washed and soaked in pure water (renewed several times), for a period of 72 h to remove xmreacted FeCls. The composite films thus obtained are then dried under vacuum at 60 °C for 72 h. Complete polymerization yields a composite with about 6.5% PPy by weight. [Pg.265]

Anhydrous FeCls (0.590 g, 3.64 mmol) is added to a solution of monomer lla " (255 mg, 0.91 mmol) in 25 mL of dry CHCI3, under N2 atmosphere. The resulting mixture is stirred at room temperature for 24 h. The solvent is removed under vacuum and the solid is washed with methanol. The crude product is filtered and further purified by Soxhlet extraction for 24 h against acetone. The... [Pg.375]

Methylthiophene/styrene copolymers Methyl methacrylate does not homopolymerize or copolymerize if present in the monomer feed during the oxidation of 3-methylthiophene. This is the reason that its copolymer with 3-MT is prepared indirectly as described above. Its homopolymerization is generally initiated by anions or free radicals. Styrene, however, undergoes a random copolymerization when present during the chemical oxidation of 3-methylthiophene initiated with anhydrous FeCls [73]. Monomer reactivity ratios for the copolymerizations in methylene chloride and nitrobenzene at 5°C are reported, but there is considerable scatter in the Fineman-Ross plots. The proposed structure of the 3-MT/stryrene copolymer is shown in Figure 11.16, where R = H. [Pg.481]

Anhydrous FeCls initiates cationic polymerization of styrene in methylene chloride, a good solvent for polystyrene. The polystyrene is easily recovered by pouring the solution into a large quantity of methanol and filtering. If a mixture of pyrrole and styrene is added to a solution of FeCl3 in methylene chloride, a brown precipitate is recovered after filtration. [Pg.492]

Immersing saturated PVDF into oxidant agent. 60 °C of 1.5 M anhydrous FeCls aqueous solution e.g.,... [Pg.424]

Ethyl-J -thiazoline in abs. ethanol added drop wise with stirring at 60-70° to a suspension of anhydrous FeCls in the same solvent, and kept an additional... [Pg.477]


See other pages where Anhydrous FeCl is mentioned: [Pg.438]    [Pg.226]    [Pg.51]    [Pg.288]    [Pg.597]    [Pg.602]    [Pg.108]    [Pg.51]    [Pg.619]    [Pg.151]    [Pg.716]    [Pg.220]    [Pg.90]    [Pg.95]    [Pg.96]    [Pg.96]    [Pg.220]    [Pg.60]    [Pg.216]   
See also in sourсe #XX -- [ Pg.3 , Pg.252 ]




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