Abstract
In the title compound, C7H10N+·BF4 −·C12H24O6, the protonated 4-methylanilinium cation interacts with 18-crown-6 forming a rotator–stator structure, (C6H4CH3NH3 +)(18-crown-6), through three bifurcated N—H⋯(O,O) hydrogen bonds between the ammonium groups of the cations (–NH3) and the O atoms of the crown ether molecule. The BF4 − anions, the methyl group and the protonated –NH3 groups of the 4-methylanilinium lie on a dual axis of rotation. The 18-crown-6 unit is perpendicular to the dual axis of rotation and the mirror plane which contains the dual axis of rotation. The benzene ring of 4-methylanilinium is perpendicular to the mirror plane and parallel to the dual axis.
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