The asymmetric unit of the title salt, C3H6N3
+·C2F3O2
−, contains two independent 3-aminopyrazolium cations and two independent trifluoroacetate anions. The F atoms of both anions were refined as disordered over two sets of sites, with common occupancy ratios of 0.639 (12):0.361 (12). In the crystal, the cations and anions are linked via N—H⋯O hydrogen bonds, forming chains along [100] and [010].
In the title salt, C13H19N2
+·BF4
−, an ionic liquid, the butyl and ethyl substituents bonded to the N atoms of the imidazole ring [r.m.s. deviation = 0.019 (1) Å] adopt equatorial positions. The crystal structure exhibits slipped π–π interactions between the imidazole and benzene rings of neighbouring molecules [centroid–centroid distance = 3.529 (2) Å]. In the tetrafluoroborate anion, the B and F atoms are disordered over two sets of sites with site-occupancy factors of 0.813 (7) and 0.187 (7).
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