data reports
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In the title compound, C15H13N3O, the pyrrolyl and phenyl rings make dihedral angles of 58.99 (5) and 34.95 (5)°, respectively, with the central pyrazole ring. In the crystal, weak, pairwise C—HO interactions across centers of symmetry form dimers, which are further associated into corrugated sheets running approximately parallel to (100) via weak C—HN interactions.
data reports
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In the title compound, C15H15N7, the phenyl ring is inclined by 19.86 (5)° to the mean plane of the pyrazolo[3,4-b]pyrazine core. In the crystal, N—HN and C—HN hydrogen bonds form [010] chains, which stack via π–π interactions [centroid–centroid distance between the pyrazole rings = 3.4322 (7) Å].
data reports
Open access
The title compound, C16H16N4O2, crystallizes with two molecules in the asymmetric unit, one of which shows disorder of the acetate group over two sets of sites in a 0.799 (2):0.201 (2) ratio. The phenyl group has a similar but opposite sense of twist relative to the pyrazole ring in the two molecules, as indicated by the syn N—N—Car—Car (ar = aromatic) torsion angles of 39.7 (2) and −36.9 (2)°. Each molecule features an intramolecular N—HO hydrogen bond, which closes an S(6) ring. In the crystal, C—HO and C—HN interactions direct the packing into a layered structure parallel to (110).
data reports
Open access
The title compound, C15H14N4O, crystallizes with two molecules in the asymmetric unit with similar conformations (r.m.s. overlay fit for the 20 non-H atoms = 0.175 Å). In the first molecule, the dihedral angles between the planes of the central pyrazole ring and the pendant phenyl and pyrrole rings are 42.69 (8) and 51.88 (6)°, respectively, with corresponding angles of 54.49 (7) and 49.61 (9)°, respectively, in the second molecule. In the crystal, the two molecules, together with their inversion-symmetry counterparts, are linked into tetramers by O—HN hydrogen bonds. The tetramers form layers parallel to (211) through pairwise C—Hπ interactions.