Trifluoromethane sulfonamide

The choice of the anion ultimately intended to be an element of the ionic liquid is of particular importance. Perhaps more than any other single factor, it appears that the anion of the ionic liquid exercises a significant degree of control over the molecular solvents (water, ether, etc.) with which the IL will form two-phase systems. Nitrate salts, for example, are typically water-miscible while those of hexaflu-orophosphate are not those of tetrafluoroborate may or may not be, depending on the nature of the cation. Certain anions such as hexafluorophosphate are subject to hydrolysis at higher temperatures, while those such as bis(trifluoromethane)sulfonamide are not, but are extremely expensive. Additionally, the cation of the salt used to perform any anion metathesis is important. While salts of potassium, sodium, and silver are routinely used for this purpose, the use of ammonium salts in acetone is frequently the most convenient and least expensive approach. 

BAm = benzylamine BE = benzyl ether BMI.Tf2N = bis(trifluoromethane)sulfonamide of l-n-butyl-3-methylimidazolium CH = cyclohexane ... 

One entrance into the chemistry of sulfimide-based functional groups is electrophilic activation of the corresponding sulfoxides with triflic anhydride and subsequent reaction of the resulting sulfonium salts with trifluoromethane sulfonamide [39[ (Scheme 2.179). The other entrance is oxidative imination of a sulfoxide then trifluoromethanesulfonylation of the resulting imidosulfone [40]. 

Photolysis of perfluoroalkylsulfonyl bromide (11) [10], perfluoroazoalkanes (12) [11], hexafluoroacetone (13) [12], and N-nitroso-N-(trifluoromethyl)trifluoromethane sulfonamide (14) [13] also generates Rf radicals (Scheme 1.67). 

Lithium perchlorate displays explosive properties. The hazards of LPDE accelerated the search for alternative lithium compounds. Lithium trifluoromethane sulfonamide was used in some Diels-Alder reactions [23]. The limited access to this compound prompted the consideration of other lithium salts such as lithium tetrafluoroborate (LB) and lithium triflate (LS) [24]. They have seemingly similar catalytic activity to LPDE. Table 10.5 compares the catalytic merits of these lithium... 

Electrical conductivity measurements have been reported on a wide range of polymers including carbon nanofibre reinforced HOPE [52], carbon black filled LDPE-ethylene methyl acrylate composites [28], carbon black filled HDPE [53], carbon black reinforced PP [27], talc filled PP [54], copper particle modified epoxy resins [55], epoxy and epoxy-haematite nanorod composites [56], polyvinyl pyrrolidone (PVP) and polyvinyl alcohol (PVA) blends [57], polyacrylonitrile based carbon fibre/PC composites [58], PC/MnCli composite films [59], titanocene polyester derivatives of terephthalic acid [60], lithium trifluoromethane sulfonamide doped PS-block-polyethylene oxide (PEO) copolymers [61], boron containing PVA derived ceramic organic semiconductors [62], sodium lanthanum tetrafluoride complexed with PEO [63], PC, acrylonitrile butadiene [64], blends of polyethylene dioxythiophene/ polystyrene sulfonate, PVC and PEO [65], EVA copolymer/carbon fibre conductive composites [66], carbon nanofibre modified thermotropic liquid crystalline polymers [67], PPY [68], PPY/PP/montmorillonite composites [69], carbon fibre reinforced PDMS-PPY composites [29], PANI [70], epoxy resin/PANI dodecylbenzene sulfonic acid blends [71], PANI/PA 6,6 composites [72], carbon fibre EVA composites [66], HDPE carbon fibre nanocomposites [52] and PPS [73]. 

Electrical properties have been reported on numerous carbon fiber-reinforced polymers, including carbon nanoflber-modified thermotropic liquid crystalline polymers [53], low-density polyethylene [54], ethylene vinyl acetate [55], wire coating varnishes [56], polydimethyl siloxane polypyrrole composites [50], polyacrylonitrile [59], polycarbonate [58], polyacrylonitrile-polycarbonate composites [58], modified chrome polymers [59], lithium trifluoromethane sulfonamide-doped polystyrene-block copolymer [60], boron-containing polyvinyl alcohols [71], lanthanum tetrafluoride complexed ethylene oxide [151, 72, 73], polycarbonate-acrylonitrile diene [44], polyethylene deoxythiophe-nel, blends of polystyrene sulfonate, polyvinyl chloride and polyethylene oxide [43], poly-pyrrole [61], polypyrrole-polypropylene-montmorillonite composites [62], polydimethyl siloxane-polypyrrole composites [63], polyaniline [46], epoxy resin-polyaniline dodecyl benzene sulfonic acid blends [64], and polyaniline-polyamide 6 composites [49]. 

Poly [ 1 -(4-viny Ibenzy l)-3 -butylimidazolium trifluoromethane sulfonamide] carbon dioxide 2005TA5... 

Poly[l-(4-vinylbenzyl)-3-butylimidazolium o-benzoic sulfimide] Poly [ 1 -(4-vinylbenzyl)-3 -butylimidazolium hexafluorophosphate] Poly [ 1 -(4-vinylbenzyl)-3 -butylimidazolium tetrafluoroborate] Poly [ 1 -(4-vinylbenzyl)-3 -butylimidazolium trifluoromethane sulfonamide]... 

In a related study, the use of a steady-state fluorescence spectroscopy for investigation of chiral recognition ability of amino acid-based L-alanine tert butyl ester bis (trifluoromethane) sulfonamide (L-AlaC4NTf2) chiral ionic liquids was recently demonstrated [24], In this study, L-AlaC4NTf2 was used as a solvent and chiral auxiliary for enantiomeric discrimination of warfarin, naproxen, and... 

The polymerizable styrene-based l-[(4-ethenyl phenyl) methyl]-3-alkyl-imidazolium bis (trifluoromethane) sulfonamide IL monomers with three different lengths of the alkyl substituent (methyl, n-butyl or n-hexyl)... 

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