Conformational dynamics of a bispyridinium cyclophane |
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| Authors: | Conejo-García Ana Campos Joaquín M Entrena Antonio Sánchez-Martín Rosario M Gallo Miguel A Espinosa Antonio |
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| Institution: | Departamento de Química Farmacéutica y Orgánica, Facultad de Farmacia, c/ Campus de Cartuja s/n, 18071 Granada, Spain aespinos@ugr.es |
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| Abstract: | A complete study of the conformational behavior of 4,8-diaza-3(1,4),9(4,1)-dipyridina-1,6(1,4)-dibenzenacyclodecaphan-3(1),9(1)-bis(ilium) bishexafluorophosphate is described. This study allows us to conclude that the process observed by which the different chemical shifts of the pyridinium protons show coalescence at a high-temperature 1H NMR is the rotation around the C-N bond, whereas the conformational equilibrium between the four conformers is produced at low temperature. |
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