In the title compound, C(17)H(15)N(3)O(5)S, the nitro and thio-ureido groups are twisted by 7.2 (7) and 21.4 (2)°, respectively, from the nitro-benzene ring plane whereas the thio-ureido and the ethyl ester group make dihedral angles of 43.0 (1) and 18.0 (2)°, respectively, with the benzene rings to which they are attached. Intra-molecular N-H⋯O hydrogen-bonding inter-actions are observed. In t...

In the title compound, C17H17NO2, the carbazole skeleton includes an eth-oxy-carbonyl group at the 3-position. The indole three-ring system is almost planar [maximum deviation = 0.065 (2) Å], and the ethyl ester group is inclined to its mean plane by 15.48 (2)°. In the crystal, there are π-π stacking inter-actions between parallel benzene rings and between parallel benzene and pyrrole rings of ...

In the title compound, C14H17N3O3, the dihedral angle between the benzene ring and the five-membered di-hydro-pyrazole ring is 52.26 (9)°. The ethyl ester group is approximately planar (r.m.s. deviation 0.0568 Å) and subtends an angle 67.73 (8)° to the pyrazole ring. In the crystal, molecules are linked by pairs of N-H⋯O hydrogen bonds, forming inversion dimers with an R 2 (2)(10) ring motif. W...

PURPOSE This study was aimed to investigate the relationship between indoor air pollutant levels and residential environment in children with atopic dermatitis (AD) living in Seoul. METHODS A total of 150 children with AD were included. Residential environment was assessed by questionnaires which were completed by their parents. To evaluate the level of exposure to the indoor air pollutants, ...

In the title compound, C(16)H(14)Br(2)N(2), the complete molecule is generated by a crystallographic twofold axis. The dihedral angle between the two benzene rings is 35.28 (8)° and that between the best planes of two ethyl-idinehydrazine N-N=C-Me units is 87.67 (11)°. Each of these N/N/C/C planes makes a dihedral angle of 63.81 (10)° with the adjacent benzene ring. In the crystal, the mol-ecul...

The mol-ecule of the title compound, C(16)H(24)N(2)O(6), which lies on a crystallographic inversion centre in the centre of the benzene ring, adopts an anti conformation in terms of the relative orientation of two amide carbonyl groups. One pair of the 2-hydroxy-ethyl groups is partially disordered with site occupancy factors of 0.811 (2) and 0.189 (2). The dihedral angle between the amide grou...

The title compound, C(11)H(10)N(4)O(4)·H(2)O, was synthesized from 1-azido-methyl-3-nitro-benzene and ethyl acetyl-acetate. Single-crystal X-ray analysis reveals that the dihedral angle between the triazole and benzene ring planes is 84.80 (2)°. The packing of the mol-ecules is stabilized by strong O-H⋯O hydrogen bonds involving the solvent water mol-ecules as donors and acceptors. The resultin...

In the title compound, C(24)H(28)N(2)O(4)S(2), the dihedral angles between the central benzene ring and the pendant rings are 77.44 (11) and 79.23 (10)°, and the dihedral angle between the pendant rings is 23.31 (12)°. Both sulfonamide groups project to the same side of the central benzene ring and the mol-ecule has approximate non-crystallographic mirror symmetry. One of the ethyl side chains ...

In the title mol-ecule, C(26)H(26)N(4), the central benzene ring forms dihedral angles of 89.9 (2) and 85.4 (2)° with the two benzimidazole rings.

Organic compounds such as benzene, toluene, ethyl benzene and o-, m-, and p-xylene from contaminated soil and groundwater may permeate through thermoplastic pipes which are used for the conveyance of drinking water in water distribution systems. In this study, permeation parameters of benzene in 25 mm (1 inch) standard inside dimension ratio (SIDR) 9 high density polyethylene (HDPE) pipes were ...