A series of 4, 6-bis-(1, 2, 3-triazolyl)-pyrimidine and 4, 6-bis-(1, 2, 3-triazolyl)-pyridine anion receptors were synthesized and the effect of the pyrimidine and pyridine moieties on their binding properties was examined. We found that intramolecular interactions preorganize the 4, 6-bis-(1, 2, 3-triazolyl)-pyridine receptors resulting in higher anion binding constants in comparison with the nonpreorganized 4, 6-bis-(1, 2, 3-triazolyl)-pyrimidine receptor.
