organic compounds
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In the title sydnone compound [systematic name: 3-(2,3-dimethyl-5-oxo-1-phenyl-2,5-dihydro-1H-pyrazol-4-yl)-1,2,3-oxadiazol-3-ium-5-olate], C13H12N4O3, the oxadiazole and pyrazole rings are essentially planar [maximum deviations = 0.006 (1) and 0.019 (1) Å, respectively] and are inclined at interplanar angles of 37.84 (4) and 46.60 (4)°, respectively, with respect to the benzene ring. In the crystal, adjacent molecules are interconnected into a three-dimensional supramolecular network via intermolecular C—HO hydrogen bonds. Weak intermolecular π–π aromatic stacking interactions [centroid–centroid distance = 3.5251 (5) Å] further stabilize the crystal packing.
organic compounds
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In the title compound, C10H8N2O3, the oxadiazole ring is essentially planar, with a maximum deviation of 0.006 (1) Å for the two-connected N atom. The mean planes through the aldehyde unit and the methyl-substituted phenyl ring make interplanar angles of 13.60 (9) and 59.69 (4)°, respectively, with the oxadiazole ring. In the crystal structure, adjacent molecules are interconnected into a two-dimensional array parallel to (100) by intermolecular C—HO hydrogen bonds.
organic compounds
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In the title sydnone compound, C24H18N6O3S {systematic name: 4-[3-(1-naphthyloxymethyl)-7H-1,2,4-triazolo[3,4-b][1,3,4]thiadiazin-6-yl]-3-p-tolyl-4,5-dihydro-1,2,3-oxadiazol-3-ium-5-olate} an intramolecular C—HO hydrogen bond generates an S(6) ring motif. The 3,6-dihydro-1,3,4-thiadiazine ring adopts a twist-boat conformation. The essentially planar 1,2,3-oxadiazole and 1,2,4-triazole rings [maximum deviations of 0.006 (1) and 0.008 (1) Å, respectively] are inclined to one another at interplanar angle of 44.11 (4)°. The naphthalene unit forms an interplanar angle of 66.40 (4)° with the 1,2,4-triazole ring. In the crystal packing, pairs of intermolecular C—HO hydrogen bonds link adjacent molecules into dimers incorporating R22(12) ring motifs. Further stabilization is provided by weak C—Hπ interactions.
organic compounds
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In the title compound, C16H13N3OS, the thiomorpholine ring exists in a screw boat conformation. The angle between the benzimidazole ring system and the benzene ring fused to the thiazine ring is 67.22 (6)°. In the crystal, molecules form infinite chains along the a axis via intermolecular N—HN interactions. C—Hπ interactions also contribute to the stability of the crystal structure.