Methane, Trifluoro

ESCA has been used to determine the molecular structure of the fluoride lon-induced tnmenzation product of perfluorocyclobutene [74] and the products of the sodium borohydnde reduction of perfluoromdene [75] ESCA is also used to analyze and optimize gas-phase reactions, such as the bromination of trifluoro-methane to produce bromotrifluoromethane, a valuable fire suppression agent [76] The ionization energies for several hundred fluorme-containing compounds are summarized in a recent review [77]... 

Martin, Castro and Martin 22> found increases in for two chloromethyl ethers (Table 4) which are in agreement with the Watts and Goldstein data. Cox and Smith 23> examined 1/13c H, 1/13c 19p and 2/H F in difluoro-and trifluoro-methane (Table 5). The results for the I3C-H coupling are in accord with those... 

Trifluoro methane sulfonate Triisopropanolamine Trimethylamine Tri-n-butylamine... 

Dimethyl- 1-propenyl Trifluoro-methane Ellb. 1089 [(R-S(),),0 + (HjOjCH-CO-CH.,)... 

Comparable results were obtained when an IL (ethyl-methylimmidazolium-bis(trifluoro-methane-sulfonyl)imide EMI-TFSI) was tested using a series of nanoporous carbons with average pore width in the range of 0.65-1.1 nm [18], The ion sizes, calculated as 0.79 and 0.76 nm in the longest dimension for TFSI and EMI ions, respectively, are within the range of carbons pore size. Figure 8.8 points out that, when the average pore size decreases from 1.1 to 0.7 nm, the normalized capacitance increases below 0.7 nm, the normalized capacitance decreases. Since the maximum at 0.7 nm is... 

Acceptor numbers of various solvents are also listed in Table 3. The values range from zero, for the reference solvent -hexane, to about 130, for trifluoro-methane sulfonic acid. For instance, the acceptor number of aliphatic alcohols varies between 27 and 41 (methanol). Within the group of dipolar aprotic solvents there are considerable differences in acceptor properties. Solvents such as propylenecarbonate, tetramethylene-sulfone, acetonitrile, dimethylsulfoxide, or nitromethane are stronger acceptors than solvents such as acetone, A-methylpyrroli-done, or dimethylacetamide. The acceptor strengths of amine solvents vary considerably with the degree of substitution. For instance, triethylamine has no acceptor properties. 

Trifluoro methane sulfonyl fluoride fipronil, mefluidide... 

Although zwitterions are mainly considered for their novel ion conductive matrix in this chapter, they are being used as not only as solvents and catalysts for organic reactions [42] but also as organogelators [43]. Zwitterions have been screened as solvent/catalysts for several classical acid-promoted organic reactions such as the Fischer esterification, alcohol dehydrodimerization, and the pinacol/ benzopinacole rearrangement. The zwitterion containing an equimolar trifluoro-methane sulfonic acid is liquid at room temperature. Because they can work as solvent/catalysts, as shown in the reactions discussed in this chapter, zwitterionic liquids should open the door to a whole new area of applications. 

The Diels-Alder reaction between l,3-diarylbenzo[c]furans and simple alkenes and alkynes has been much investigated kinetically. Glass and Smith found a remarkable enhancement of dienophilicity by the trifluoro-methane sulfonyl group in a series of substituted phenylacetylenes of type 205 with 205 (R = SiMej) no reaction occurred. 

When copper(I) oxide is dissolved in a benzene solution of trifluoro-methane sulfonic acid the complex Cu(CF3S03) CgHg results (319). 

ACETALIZATION Molecular sieves. Nafion-H. Trimethylsilyl trifluoro-methane-sulfonate. 

Various additives have been added to PFSA membranes to either replace the water or to retain the water at higher temperatures. Nafion has been swollen with phosphoric acid and a conductivity of 0.05 S/cm has been achieved at 150°C. Unfortimately, the anode fails after a short period of time in these membranes so no successful FC tests have been run. 1-Butyl,3-methyl imidazolium triflate and tetrafluoroborate have also been used to swell Nafion giving a conductivity of 0.1 S/cm at 180°C. Nafion has also been swollen with heterocycle solutions, imidazole, and imidazolium salts in trifluoroacetate and trifluoro methane sulfonate solution, although the reported conductivities are more modest, 10 S/cm at 100°C. Acetic acid and tetra-n-butylammonium chloride solutions of the heteropoly acid (HPA), 12-phosphotungstic acid (PTA), have all been used with Nafion giving improved FC performance at 110°C and 120°C, respectively, vs. the undoped PFSA. ... 

CARBON-TETRACHLORIDE TRICHLORO-FLUOROMETHANE OICHLORODI FLUOROMETHANE CHLOROTRI-FLUOROME7HANE CARBON-TETRAFLUORIDE CARBON MONOXIDE CARBON DIOXIDE CARBONYL-SULFIDE CARBON-DISULFIDE CHLOROFORM DICHLORO-FLUOROMETHANE CHLORODI-FLUOROMETHANE TRIFLUORO-METHANE TRIIODOMETHANE ISOTHIOCYANIC-ACID... 

Name. Trifluoro-methane Fluorocarbon-23 Hexafluoro- ethane Fluorocarbon-116 Vinyl Fluoride Vinylidene Fluoride... 

C7H,F9N2OSSi l,l,l-Trifluoro-N-[2,2,2-trifluoro-l-(trifluoro)]methane-sulfonamide 62609-67-0... 

What is the pH of 250.0 mL of an aqueous solution containing 0.616 g of the strong acid trifluoro-methane sulfonic acid (CF3SO3H) ... 

Lithium bis(trifluoro methane sulfonyl) methane LiCH(S02CF3)2 116... 

Dichlorophenol and a little trifluoro-methan sulphonic acid weretreated with chlorine at 70C during 54 min. 

Coon et al. [58] have reported the preparation of aftronium trifluoro-methane sulfonate based on the analogy of the related preparation of the perchlorate or fluoroborate. Hydronium trifluoromethanesulfonate is, however, difficult to separate from the nitronium salt... 

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