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In the title compound, C12H14BrN3O2, the pyrazole and benzene rings are nearly co-planar with a dihedral angle between the rings of 2.36 (5)°. In the crystal, inversion dimers linked by pairwise N—H...N hydrogen bonds generate R 2 2(8) loops. The dimers are linked into a three-dimensional network by weak aromatic π–π stacking interactions [centroid–centroid separation = 3.7394 (6) Å] and C—H...O and C—H...Br hydrogen bonds.

In the title compound, C14H11N3O2, the indazole portion is planar to within 0.022 (2) Å and subtends a dihedral angle of 65.87 (7)° with the pendant benzene ring. In the crystal, oblique stacks of molecules extending along the a-axis direction are generated by π–π stacking interactions between the five- and six-membered rings [centroid–centroid separation = 3.6743 (19) Å] and the stacks are cross-linked by C—H...O hydrogen bonds.

The asymmetric unit of the title compound, C9H6ClN3O3, contains one full molecule in a general position and a half molcule sitting on a crystallographic mirror plane. In the crystal, molecules form stacks extending along theb-axis direction through a combination of offset π–π stacking between indazole units and C—Cl...π(ring) interactions with the six-membered rings of the same units. Elaboration of the C—Cl...π(ring) interactions along thea-axis direction forms slabs of molecules parallel to [001]. The stacks are joined by a combination of C—H...O and C—H...N hydrogen bonds.

In the crystal, the title molecule, C10H9N3O2, packs in layers approximately parallel to (100), which are formed by the association of zigzag chains constructed by weak C—H...O interactions. The allyl group is disordered over two positions, with a ratio of their occupancies close to 70:30.

In the title compound, C9H8ClN3O2, the terminal C atom of the ethyl group deviates from the indazole ring (r.m.s. deviation = 0.008 Å) by 1.588 (3) Å. The dihedral angle between the ring system and the attached nitro group is 2.8 (3)°. In the crystal, weak C—H...O interactions link the molecules into zigzag chains propagating along [001]. In addition, weak π–π stacking interactions [centroid–centroid separations = 3.6809 (10) and 3.7393 (11) Å] help to consolidate the packing.

In the title molecule, C9H7N3O3, the indazole moiety is essentially planar and the mean plane of the acetyl substituent is twisted by 5.3 (1)° from its plane. In the crystal, weak C—H...O and C—H...N hydrogen bonds form layers parallel to (102), which are associated through π-stacking interactions to form a three-dimensional network. The structure was refined as a two-component twin.

In the title compound, C9H8ClN3O2, the orientation of the ethyl substituent is partly determined by an intramolecular C—H...Cl hydrogen bond. The indazole moiety is slightly folded with an angle of 0.70 (8)° between the five- and six-membered rings. In the crystal, molecules pack in layers parallel to [100] through C—H...π(ring) and N...;O...π(ring) interactions.

In the title compound, C10H10ClN3O3, the side chain is oriented nearly perpendicular to the mean plane of the indazole ring system. In the crystal, complementary sets of O—H...N and C—H...O hydrogen bonds form chains of molecules stacked along thea-axis direction

The asymmetric unit of the title compound, C11H11N3O4, comprises two independent molecules, both of which display positional disorder of their ethyl chains in 0.868 (4):0.132 (4) and 0.839 (4):0.161 (4) ratios. The packing is directed by a combination of C—H...O hydrogen bonds and N—O...π interactions between nitro groups and the aromatic rings.

The asymmetric unit of the title compound, C18H23ClN6O2, consists of two independent molecules differing primarily in the dihedral angles between the mean planes of the indazole and triazole moieties [78.50 (8) in one and 72.39 (7)° in the other]. One of the molecules shows positional disorder of the terminal part of its octyl chain. In the crystal, C—H...X(X= Cl, N, O) hydrogen bonds and C—H...π and π-stacking interactions are observed: together these generate a three-dimensional network.

In the title compound, C16H17N3, the indazole ring system makes a dihedral angle of 64.73 (12)° with the pyrrole ring. The atoms of the allyl group are disordered over two sets of sites, with a refined occupancy ratio of 0.70 (3):0.30 (3). The mean plane through the major component of the allyl group is nearly perpendicular to the indazole ring, as indicated by the N—C—C=C torsion angle of −114 (1)°. In the crystal, molecules are linked by C—H...π interactions, forming undulating sheets parallel to theabplane.

The title compound, C14H11N3O2, crystallizes with two molecules in the asymmetric unit. The indazole ring system and the nitro group are nearly coplanar, with the largest deviations from the mean plane being 0.070 (4) Å in one molecule and 0.022 (3) Å in the second. The dihedral angle between the mean plane through the phenyl ring and the mean plane of the indazole ring system is of 23.24 (18)° in the first molecule and 26.87 (18)° in the second. In the crystal, molecules are linked by two C—H...O hydrogen bonds, forming linear zigzag tapes running along thec-axis direction, and by π–π stacking of molecules along thebaxis, generating a three-dimensional structure.

In the title molecule, C9H9N3O2, the nitro substituent is twisted by 4.0 (2)° out of the plane of the indazolyl moiety; the ethyl group is perpendicular to the indazolyl plane, with the N—N—C—C torsion angle being 101.4 (2)°. In the molecular packing, C—H...O hydrogen bonds lead to supramolecular chains along [001]. Globally, molecules assemble into layers in thebcplane. π–π interactions between five- and six-membered rings consolidate the three-dimensional packing [inter-centroid distance = 3.591 (1) Å]. The sample was refined as an inversion twin.

The asymmetric unit of the title compound, C14H11N3O2, contains two independent molecules linked by a C—H...O hydrogen bond. Pairs of neighboring dimeric units associateviaπ–π stacking interactions.