In the title compound, C(8)H(6)BrNO(2), the dihedral angle between the planes of the benzene ring and the nitro group is 22.99 (12)°. In the crystal, inversion dimers associated by pairs of short Br⋯O contacts [3.2319 (17) Å] occur.

The title compound, C(14)H(12)ClNO, a Schiff base derived from 3-methyl-salicyl-aldehyde, crystallizes in the phenol-imine tautomeric form with an E conformation for the imine functionality. The mol-ecule is not planar, the dihedral angle between the aromatic rings being 36.38 (5)°. The hy-droxy H atom is involved in a strong intra-molecular O-H⋯N hydrogen bond, generating an S(6) ring.

In the crystal structure of the title compound, C(11)H(11)FO(2), the methine CH forms an intra-molecular hydrogen bond with the carboxyl- O atom. The mol-ecules form dimers through hydrogen bonding between carboxyl- groups. These dimers are linked to each other by C-H⋯O contacts between the benzene and carbonyl groups of adjoining mol-ecules. In addition, there are weak inter-molecular C-H⋯F co...

In the title compound, C(14)H(10)Cl(2)N(2)O, which is an important synthetic precursor of a human immunodeficiency virus type 1 (HIV-1) inhibitor, the dihedral angle between the 2,6-dichloro-phenyl ring and the phenyl ring is 69.4 (1)°. In the crystal structure, the mol-ecules form centrosymmetric dimers via N-H⋯O hydrogen bonds with an R(2) (2)(8) motif. The dimers are connected by inter-molec...

The title compound, C(12)H(9)FN(2)O(2), was prepared by the reaction of 2-fluoro-benzaldehyde and furan-2-carbohydrazide. The furan ring is disordered over two sets of sites with refined occupancies of 0.60 (3):0.40 (3). The major and minor components of the furan ring make dihedral angles of 51.9 (6) and 38.0 (10)°, respectively, with the benzene ring. In the crystal, mol-ecules are linked via...

The two C=N double bonds in the structure of the title compound, C(28)H(24)N(2), lie in the same plane with a bond length of 1.269 (2) Å. The mol-ecule is positioned on a centre of symmetry.

Two mol-ecules make up the asymmetric unit of the title compound, C(12)H(18)N(4)O(2), and both feature an intra-molecular O-H⋯N hydrogen bond, which generates an S(6) ring. The diethyl-amino group of one of the mol-ecules is disordered over two sets of sites in a 0.59 (2):0.41 (2) ratio. In the crystal, N-H⋯O hydrogen bonds link the mol-ecules into sheets lying parallel to the ac plane and C-H⋯...

In the title compound, C(12)H(9)FN(2)O, the dihedral angle between the benzene ring and the pyridine ring is 4.35 (16)°. The mol-ecular conformation is stabilized by an intra-molecular O-H⋯N hydrogen bond.

In the title compound, C(13)H(12)N(4)O(2), all the non-H atoms lie on a crystallographic mirror plane and an intra-molecular N-H⋯N hydrogen bond generates an S(5) ring; the conformation about the imine bond [1.280 (3) Å] is E. In the crystal, mol-ecules assemble into a two-dimensional array via C-H⋯O(carbon-yl) and C-H⋯N(pyrazine) contacts. Layers stack along the b-axis direction via weak π-π i...

The asymmetric unit of the title compound, C(13)H(11)N(3)O(2), contains two mol-ecules with slightly different conformations: the dihedral angle between the aromatic rings is 13.01 (10)° in one mol-ecule and 14.05 (10)° in the other. Both mol-ecules feature short intra-molecular C-H⋯O contacts, which generate S(6) rings. In the crystal, both mol-ecules form inversion dimers linked by pairs of N...