Anion-pi interactions in adducts of anionic guests with octahydroxy-pyridine[4]arene: theoretical and experimental elucidation

Rozhenko AB, Schoeller W, Letzel MC, Decker B, Mattay J (2013)
New Journal Of Chemistry 37(2): 356-365.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
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Abstract / Bemerkung
A theoretical investigation has been carried out at the DFT ( B3LYP, RI-BP86, RI-B97-D) and RI-MP2 levels of approximation for octahydroxy-pyridine[4]arene and a series of its adducts with anions (BF4-, PF6-, NO3-, CH3COO- and CF3COO-) and ammonium cations (NH4+). The encapsulated complexes ( two hosts to one guest molecule) are predicted to be more stable in the gas phase than the corresponding 1 : 1 adducts. Calculations using Grimme's B97-D functional have provided relative energies, which agree well with those derived at the RI-MP2 level of theory. By taking solvent effects into account using the COSMO routine, the formation of the anionic adducts is significantly less favourable. Complexes of octahydroxy-pyridine[4]arene with the ammonium cation seem to be unstable in solution. The most promising complexes of octahydroxy-pyridine[4]arene with BF4- and PF6- have been studied experimentally. Only formation of 1 : 1 anionic adducts has been detected using electrospray ionization mass spectrometry. Probably, in the 1 : 1 complexes the coordinated anion still interacts with a counterion. The excess of anionic guests used in the experiment and the conditions in the ESI source of the mass spectrometer have been considered another possible reason for shifting the equilibrium towards the 1 : 1 aggregates.
Erscheinungsjahr
Zeitschriftentitel
New Journal Of Chemistry
Band
37
Zeitschriftennummer
2
Seite
356-365
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Rozhenko AB, Schoeller W, Letzel MC, Decker B, Mattay J. Anion-pi interactions in adducts of anionic guests with octahydroxy-pyridine[4]arene: theoretical and experimental elucidation. New Journal Of Chemistry. 2013;37(2):356-365.
Rozhenko, A. B., Schoeller, W., Letzel, M. C., Decker, B., & Mattay, J. (2013). Anion-pi interactions in adducts of anionic guests with octahydroxy-pyridine[4]arene: theoretical and experimental elucidation. New Journal Of Chemistry, 37(2), 356-365. doi:10.1039/c2nj40670e
Rozhenko, A. B., Schoeller, W., Letzel, M. C., Decker, B., and Mattay, J. (2013). Anion-pi interactions in adducts of anionic guests with octahydroxy-pyridine[4]arene: theoretical and experimental elucidation. New Journal Of Chemistry 37, 356-365.
Rozhenko, A.B., et al., 2013. Anion-pi interactions in adducts of anionic guests with octahydroxy-pyridine[4]arene: theoretical and experimental elucidation. New Journal Of Chemistry, 37(2), p 356-365.
A.B. Rozhenko, et al., “Anion-pi interactions in adducts of anionic guests with octahydroxy-pyridine[4]arene: theoretical and experimental elucidation”, New Journal Of Chemistry, vol. 37, 2013, pp. 356-365.
Rozhenko, A.B., Schoeller, W., Letzel, M.C., Decker, B., Mattay, J.: Anion-pi interactions in adducts of anionic guests with octahydroxy-pyridine[4]arene: theoretical and experimental elucidation. New Journal Of Chemistry. 37, 356-365 (2013).
Rozhenko, Alexander B., Schoeller, Wolfgang, Letzel, Matthias C., Decker, Bjoern, and Mattay, Jochen. “Anion-pi interactions in adducts of anionic guests with octahydroxy-pyridine[4]arene: theoretical and experimental elucidation”. New Journal Of Chemistry 37.2 (2013): 356-365.