Trifluoromethanesulfonate (triflate) as a moderately coordinating anion: Studies from chemistry of the cationic coordinatively unsaturated mono- and diruthenium amidinates

Atom transfer radical polymerization of ionic liquid monomer: The influence of salt/counterion on polymerization

“…Control experiments for ATRP of styrene with CuBr/PMDETA catalyst system in BuCN were conducted in the presence of different salts. As shown in Figure (a), after the addition of TBA salts containing non‐coordinating anions (such as BF 4 − , PF 6 − , and Tf 2 N − ), the polymerization kinetics were analogue with those carried out in the absence of any salts; when the TBA salt containing moderately weak coordinating anion (such as TfO − ) was added, the polymerization rate decreased dramatically. In addition, unlike the cases with Tf 2 N − and TfO − that showed mono‐modal GPC peaks with narrow MWD [Fig.…”

A Well‐Defined Aluminum‐Based Lewis Acid as an Effective Catalyst for Diels–Alder Transformations

“…Multinuclear NMR spectroscopy clearly suggested that the reaction between the bistriflates and Na[BAr Cl 4 ] has occurred. For example, the 27 Al NMR signal associated with the initial bistriflate compound disappeared, presumably due to peak broadening, whereas the 19 F NMR signal for the triflate ligand shifted downfield to δ =−76.5 ppm, suggesting a higher “degree of coordination” for the triflate ligand(s) 14 . 1 H NMR spectroscopy indicated the formation of new species but without any evidence of decomposition/hydrolysis that is, formation of signal(s) linked to, for example, the free/protonated β‐diketiminate ligand 15.…”

“…For example, the 27 Al NMR signala ssociated with the initial bistriflate compound disappeared, presumably due to peak broadening, whereas the 19 FNMR signal for the triflate ligand shiftedd ownfield to d = À76.5 ppm, suggesting ah igher" degree of coordination" for the triflate ligand(s). [14] 1 HNMR spectroscopy indicated the formation of new species but without any evidenceo fd ecomposition/hydrolysis that is, formationo fs ignal(s)l inked to, for example, the free/protonated b-diketiminate ligand. [15] However,t he lack of any precipitate formation suggested the absence of the targeted NaOTf elimination and formation of ac harged aluminumspecies.…”

Photochemical investigation of cyanoazobenzene derivatives as components of artificial supramolecular pumps

“…The smaller association constant of 2H + ⊂3 can be rationalized because triflate is a more coordinating ion than hexafluorophosphate. 26,27,28 Nevertheless, the complex is stable enough to consider it for our experiments. The threading kinetics of compound 1H + with 3 was also investigated: upon mixing 1H + and 3 in stoichiometric ratio, the emission decrease in time of the crown ether can be followed (Figure 7).…”