It is generally a very good solvent for organic compounds that are capable of acting as proton acceptors in the medium. The exceptional leaving-group properties of the triflate anion, CF3SO3−, make triflate esters excellent alkylating agents. The acid and its conjugate base do not provide a...
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 ...
Upon dissolving compounds 1a and 1m in fluorosulfonic acid, FSO3H in an NMR tube at −80 °C, the formation of N4-protonated species Ca and Cm, respectively, was detected (Figure 3). The proton bounded to nitrogen N4 resonates at δ≈ 12.5–13 ppm at this temperature whereas at ...
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...
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...
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 ...