In the title compound, C(5)H(7)N(2) (+)·C(6)H(2)N(3)O(7) (-), the 4-amino-pyridinium cation is essentially planar (r.m.s. deviation = 0.002 Å). The three nitro groups in the picrate anion are twisted away from the attached benzene ring [dihedral angles = 24.1 (1), 9.3 (3) and 21.4 (1)°]. In the crystal structure, the ions are linked into a three-dimensional network by N-H⋯O and C-H⋯O hydrogen b...

In the title compound, C18H18N4O4S2, the mean planes passing through the tosyl benzene rings form dihedral angles of 48.42 (9) and 15.1 (1)° with the amino-pyrimidine ring. In the crystal, mol-ecules associate via N-H⋯N and N-H⋯O hydrogen bonds, forming extended hydrogen-bonded sheets that lie parallel to the bc plane. The N-H⋯N hydrogen bonds propagate along the b-axis direction, while the N-H...

The title compound, C(18)H(16)N(2)O(2), is a precusor for the synthesis of polyimides. The mol-ecule is located on a crystallographic inversion center and the terminal amino-phen-oxy rings are almost perpendicular to the central benzene ring with a dihedral angle of 85.40 (4)°. The mol-ecular conformation is stabilized by N-H⋯O and N-H⋯N inter-molecular hydrogen-bonding inter-actions.

In the title compound, C(16)H(13)NO(3)S, the plane of the amino-benzene ring makes a dihedral angle of 61.04 (6)° with the naphthalene ring system. Both ring systems form weak intra-molecular C-H⋯O hydrogen bonds with the sulfonate group. In the crystal structure, weak inter-molecular N-H⋯O hydrogen bonds and a C-H⋯π inter-action are observed.

The title compound, C(34)H(35)O(2)N(3), was synthesized by the reaction of 2-[3,6-bis-(diethyl-amino)-9H-xanthen-9-yl]benzoyl chloride with aniline. In the mol-ecular structure, the dihedral angles between the isoindoline and xanthene planes and between the isoindoline and benzene planes are 86.9 (3) and 47.0 (2)°, respectively. The mol-ecular packing in the crystal structure is stabilized by w...

The title compound, C(11)H(11)NO(2), was synthesized by chemoselective N-acetyl-ation of 4-amino-phenol followed by reaction with propargyl bromide in the presence of K(2)CO(3). the acetamide and propyn-1-yloxy substituents form dihedral angles of 18.31 (6) and 7.01 (10)°, respectively, with the benzene ring. In the crystal, mol-ecules are linked by N-H⋯O hydrogen bonds into chains along [010]....

The title compound, C(19)H(23)N(3)O(2), was prepared by condensing 4-diethyl-amino-2-hy-droxy-benzaldehyde and 4-methyl-benzo-hydrazide in methanol. The asymmetric unit contains two independent mol-ecules in which the two benzene rings make dihedral angles of 30.3 (3) and 18.9 (3)°. Intra-molecular O-H⋯N hydrogen bonds are observed in both mol-ecules. The crystal structure is stabilized by N-H⋯...

The title mol-ecular salt, C10H12N3O3S(+)·C7H3N2O7 (-), protonation occurs at the amino N atom attached to the benzene ring of sulfamethoxazole. In the anion, there is an intra-molecular O-H⋯O hydrogen bond and the cation is linked to the anion by an N-H⋯O hydrogen bond. In the extended structure, the cations and anions are linked via N-H⋯O, N-H⋯N and C-H⋯O hydrogen bonds, forming a three-dimen...

In the toluene hemisolvated tripodal tris-(2-amino-ethyl)amine Schiff base, C(30)H(33)Cl(3)N(4)O(3)·0.5C(7)H(8), one of the three imino N atoms is protonated, forming a hydrogen bond with the O atom at an adjacent benzene ring. The other two imino N atoms act as hydrogen-bond acceptors from phenolate OH groups. The toluene solvent mol-ecule is disordered about a centre of inversion.

In the title compound, C24H19N, the di-methyl-amino group is inclined to the benzene ring by 2.81 (9)°. Their mean plane makes a dihedral angle of 64.12 (2)° with the mean plane of the pyrene ring system [r.m.s. deviation = 0.031 (1) Å]. In the crystal, mol-ecules are linked via C-H⋯π inter-actions, which connect neighbouring mol-ecules into columns along the c axis.