Abstract
The most probable structures of the cucurbit[6]uril·H3O+ and cucurbit[6]uril·(H3O+)2 cationic complex species have been derived by quantum mechanical DFT calculations. In these two complexes, each of the H3O+ ions is bound by three strong linear hydrogen bonds to three carbonyl oxygen atoms of the parent macrocycle.
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Acknowledgments
This work was supported by the Grant Agency of the Faculty of Environmental Sciences, Czech University of Life Sciences, Prague, project no. 42900/1312/3114 “Environmental Aspects of Sustainable Development of Society”, by the Czech Ministry of Education, Youth, and Sports (project MSM 6046137307), and by the Czech Science Foundation (project P205/10/2280). Computer time at the MetaCentrum (project LM 2010005) and at the Institute of Physics (computer Luna/Apollo), Academy of Sciences of the Czech Republic, is gratefully acknowledged.
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Toman, P., Makrlík, E. & Vaňura, P. Theoretical study on the protonation of cucurbit[6]uril. Monatsh Chem 142, 993–996 (2011). https://doi.org/10.1007/s00706-011-0556-9
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DOI: https://doi.org/10.1007/s00706-011-0556-9