The three-dimensional structure of chitosan/HI type I salt was determined by the X-ray fiber diffraction technique and linked-atom least-squares refinement method. Two polymer chains and four iodide ions (I(-)) crystallized in a monoclinic unit cell with dimensions a = 9.46(2), b = 9.79(2)], c (fiber axis)=10.33(2)A, beta = 105.2(2) degrees and a space group P2(1). Chitosan chains adopted an ex...

In the title compound, C14H19BrN2O2S, the 1,2,4-thia-diazinane ring adopts an envelope conformation with the N atom (attached to the sulfonyl group) as the flap, while the cyclo-hexane ring adopts a chair conformation. The mean plane of the cyclo-hexane ring is almost normal to the benzene ring and the mean plane of the 1,2,4-thia-diazinane ring, making dihedral angles of 70.4 (2) and 71.43 (19...

In the title biphenyl derivative, C12H9N3O4, the dihedral angle between the benzene rings is 52.84 (10)°. The nitro group attached to the benzene ring is inclined to the ring by 4.03 (2)°, while the nitro group attached to the amino-substituted benzene ring is inclined to the ring by 8.84 (2)°. In the crystal, mol-ecules are linked by two pairs of N-H⋯O hydrogen bonds, forming chains propagatin...

the crystal structure of the title schiff base complex is obtained by single-crystal x-ray diffraction data.the solid state structure determination reveals that the coordination geometry around the copper(ii) center istetrahedrally distorted square-planar. the crystal packing shows one dimensional infinite chains which arisesfrom the intermolecular interaction and stabilize the crystal packing.

The new title 4-thia-zolidinone derivative, C16H21N3O3S, was obtained from the cyclization reaction of 4-methyl-3-thio-semicarbazone and dimethyl acetyl-enedi-carboxyl-ate (DMAD). The cyclo-hexyl-idene ring has an envelope conformation with the stereogenic centre C atom as the flap. Its mean plane makes a dihedral angle of 56.23 (9)° with the thia-zolidine ring mean plane. In the crystal, mol-e...

In the title compound, C7H5NO4, the nitro group and the aldehyde group are inclined to the benzene ring by 16.6 (3) and 15.6 (3)°, respectively. In the crystal, mol-ecules are linked via O-H⋯O hydrogen bonds, forming chains along [100]. The chains are linked by C-H⋯O hydrogen bonds, forming a three-dimensional structure.

The mol-ecules of the title compound, C(15)H(16)N(2)O(4), are linked via N-H⋯O hydrogen bonds, forming undulating one-dimensional chains. Adjacent chains are linked by weak C-H⋯π inter-actions, forming a three-dimensional network.

In the crystal structure of the title zwitterion, C5H11N5S, mol-ecules are linked via N-H⋯N hydrogen bonds, forming zigzag chains propagating along [010]. The chains are linked by C-H⋯S hydrogen bonds, forming two dimensional networks lying parallel to (001).

In the title compound, C14H17NO3, the nine-membered 1H-indole ring system is essentially planar [maximum deviation = 0.019 (1) Å]. In the crystal, mol-ecules are linked via N-H⋯O hydrogen bonds, forming chains along [001]. These chains are linked via C-H⋯O hydrogen bonds and C-H⋯π inter-actions, forming a two-dimensional network lying parallel to the ac plane.

In the anion of the title mol-ecular salt, C7H7N2 (+)·C7H5O3 (-) (systematic name: 1H-benzimidazol-3-ium 2-hy-droxy-ben-zo-ate), there is an intra-molecular O-H⋯O hydrogen bond that generates an S(6) ring motif. The CO2 group makes a dihedral angle of 5.33 (15)° with its attached ring. In the crystal, the dihedral angle between the benzimidazolium ring and the anion benzene ring is 75.88 (5)°. ...