Über 2.4-Dinitro-5-chlor-phenylhydrazin und 2.4-Dinitro-1.5-dihydrazino-benzol

2,4-Dinitro-1-phenoxy­benzene

The title compound, C(12)H(8)N(2)O(5), was obtained by the reaction of 1-chloro-2,4-dinitro-benzene and phenol in the presence of potassium carbonate. The nitro-substituted benzene ring lies on a mirror plane, with one NO(2) group in the same plane and the other disordered across this plane. The phenoxy-benzene unit is placed perpendicular to this mirror, resulting in an exact orthogonal relati...

3,3′-Dinitro-4,4′-bipyridine

In the title compound, C(10)H(6)N(4)O(4), the pyridine rings are oriented at a dihedral angle of 67.8 (1)°. The O-atom pairs are trans, each displaced by a similar distance [average = 0.2331 (2) Å] out of the attached pyridine ring plane. In the crystal, inter-molecular C-H⋯O and C-H⋯N inter-actions link the mol-ecules into a three-dimensional network.

2,4-Dinitro-1-naphthol

In the title compound, C(10)H(6)N(2)O(5), the two fused rings are almost co-planar, with an r.m.s. deviation of 0.0163 Å. The nitro groups are oriented at dihedral angles of 2.62 (11) and 44.69 (11)° with respect to the plane of the parent fused rings. Intra-molecular O-H⋯O and C-H⋯O hydrogen bonds complete S(6) ring motifs. In the crystal, mol-ecules are linked into chains along [101] by inter...

2,2′-Dinitro-5,5′-dithio­dibenzoic acid

In the title compound, C(14)H(8)N(2)O(8)S(2), the asymmetric unit contains two independent 2,2'-dinitro-5,5'-dithio-dibenzoic acid (Dina) mol-ecules with roughly the same conformation. In the crystal structure, strong inter-molecular O-H⋯O hydrogen bonds link the organic mol-ecules into a one-dimensional zigzag chain along the a axis. The dihedral angles between the two aromatic rings [109.3 (2...

Topical immunotherapy with dinitro-chlorobenzene: safety concerns.