Monitoring triflic acid reaction

The progress of the triflic acid reaction was monitored using GLC. This technique is a rapid method of studying the volatile silanes and siloxanes being produced [68]. The product was then reacted further by an identical procedure, analysed again by GLC and the process repeated once more. This resulted in 18.24 g of a clear colourless oil. This was analysed by H, and Si Nuclear Magnetic... 

Kinetic studies of diallyltosylamide RCM reaction monitored by NMR and UV/VIS spectroscopy showed that thermal activation of the catalyst precursors la and Ib (25-80 °C) led to the in situ formation of a new species which could not be identified but appeared to be the active catalytic species [52]. Attempts to identify this thermally generated species were made in parallel by protonation of the catalysts I. Indeed, the protonation of allenylidene-ruthenium complex la by HBF4 revealed a significant increase in catalyst activity in the RCM reaction [31,32]. The influence of the addition of triflic acid to catalyst Ib in the ROMP of cyclooctene at room temperature (Table 8.2, entries 1,3) was even more dramatic. For a cyclooctene/ruthenium ratio of 1000 the TOF of ROMP with Ib was 1 min and with Ib and Sequiv. of TfOH it reached 950min [33]. 

C60 with strong acids, a C q solution was generated by controlled potential electrolysis and titrated with concentrated triflic acid. UV/visible-near IR spectra as well as steady state voltammetry with ultramicroelectrodes were used to monitor 50 and C60H. Addition of the triflic acid led to a decrease of absorbance and steady state oxidation current of Cgo". At the same time, a reduction current appeared at potentials more negative than the half wave potential of Cgg oxidation. This current was attributed to CeoH reduction. With some simple assumptions, the current changes were used to calculate the equilibrium constant of the reaction ... 

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