Pseudo-cyclic face-to-face rigid structure caused by the intramolecular ion pair effect.
نویسندگان
چکیده
Six 3-methylpyridine zwitterions and six quinoline zwitterions were synthesized through the reaction of 4-hydroxycoumarins, p-benzoquinone and the corresponding N-aromatics. The novel pseudo-cyclic face-to-face rigid structure of the zwitterion was elucidated by (1)H-NMR at different temperatures, and assumed to be caused by both the intramolecular ion pair attraction and the steric interaction.
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ورودعنوان ژورنال:
- Molecules
دوره 14 4 شماره
صفحات -
تاریخ انتشار 2009