caa a22 4500 475759095 CHVBK 20180406123545.0 cr unu---uuuuu 170329e20000901xx s 000 0 eng 10.1007/BF02495154 doi (NATIONALLICENCE)springer-10.1007/BF02495154 Complexes with strong symmetric hydrogen bonds and their solvation in the trifluoroacetic acid— N,N -dimethylformamide system studied by IR spectroscopy [Elektronische Daten] [V. Maiorov, I. Kislina, G. Voloshenko, N. Librovich] Complex formation in the trifluoroacetic acid (TFA)—DMF system containing TFA from 0 to 100 mol.% was studied by IR multiple attenuated total reflectance (MATR) spectroscopy at 30°C. The formation of uncharged 1∶1 TFA—DMF complexes with a quasi-ion structure and partial proton transfer to the O atom of the DMF molecule (quasi-ion pairs) were observed in the TFA—DMF system with the TFA content from 0 to 90 mol%. Depending on the ratio of the components, the quasi-ion pairs are solvated by the DMF or TFA molecules. The solvation of the quasi-ion pairs slightly changes the parameters of the central strong H bond. When the acid concentration reaches 80 mol.%, the proton adds to the DMF molecule to form the ion pair (DMF)H+·(A...H...A)−, whose anion contains a strong symmetric H bond. Kluwer Academic/Plenum Publishers, 2000 IR spectra nationallicence acid-base interaction nationallicence hydrogen bond nationallicence solutions nationallicence solvation nationallicence trifluoroacetic acid nationallicence N,N -dimethylformamide nationallicence Maiorov V. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut Kislina I. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut Voloshenko G. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut Librovich N. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut Russian Chemical Bulletin Kluwer Academic Publishers-Plenum Publishers 49/9(2000-09-01), 1526-1530 1066-5285 49:9<1526 2000 49 11172 https://doi.org/10.1007/BF02495154 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02495154 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Maiorov V. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut NATIONALLICENCE 700 1- Kislina I. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut NATIONALLICENCE 700 1- Voloshenko G. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut NATIONALLICENCE 700 1- Librovich N. N. N. Semenov Institute of Chemical Physics, Russian Academy of Sciences, 4 ul. Kosygina, 117977, Moscow, Russian Federation aut NATIONALLICENCE 773 0- Russian Chemical Bulletin Kluwer Academic Publishers-Plenum Publishers 49/9(2000-09-01), 1526-1530 1066-5285 49:9<1526 2000 49 11172 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer