In the present work, high proton conductivity (approximately 103S cm1) was observed in the triflic acid (HTf) containing guanidinium triflate (GTf) composites. The proton transport mechanism in the composite was elucidated by comparing the diffusion coefficients obtained from NMR and conductivity ...
trimethylsilyl ester of triflic acid CF3SO3SiMe3combined with a LEWIS base, acting as proton trap, 2,6-di-tert-butylpyridine. Without this amine-containing base, the polymerization does not take place. This amine-containing base may be replaced by a triflic acid salt such as tetrabutylammonium...
The iron bound proton is not always observed by 1H NMR spectroscopy due to fast exchange which is evident by the loss of resolution of phosphorus-hydrogen coupling constants in the 31p NMR. The structure of the protonated derivatives is discussed. An alternative synthetic route to alkyl di...
triflic acidHexamethylcyclotrisiloxane (D3), octamethylcyclotetrasiloxane (D4), and decamethylcyclopentasiloxane (D5) were equilibrated with potassium tert-butoxide or triflic acid in bulk at 100掳C to elaborate the 1H NMR and 13C NMR spectra, SEC elution curve, and MALDI-TOF (MT) mass spectrum...
Recently [18], we have shown that the S-alkylation of saturated sulfides can proceed efficiently under the action of alkyl formates in the presence of triflic acid (TfA, CF3SO3H), which has superacid properties. In all these cases, sulfonium salts are the end products which easily desorb ...