The new complex of [H2en][Cu(pydc)2].2H2O (1) (where H2en and pydc are ethylenediammonium and 2,6-pyridinedicarboxylate, respectively) was synthesized by the reaction of a mixture of ethylenediamine (en) and 2,6-pyridinedicarboxylic acid (H2pydc) in a mixture of CH3OH/H2O as solvent. This complex was fully characterized by elemental analysis, IR, UV–Vis spectroscopy as well as single-crystal X-...

In the title compound, C20H22N2O2, the central pyridine ring forms a dihedral angle of 76.32 (8)° with the pseudo-axial benzene ring. The cyclo-octane ring adopts a twisted boat chair conformation. In the crystal, weak inter-molecular C-H⋯π inter-actions between inversion-related mol-ecules result in the formation of linear double chains along the b-axis direction.

In the crystal structure of the title compound, C(18)H(22)N(2)O(2), the pyridine ring makes dihedral angles of 83.71 (6) and 9.2 (1)° with the phenyl ring and the carbamate plane, respectively. The phenyl ring and the carbamate plane are nearly perpendicular to one another, with a dihedral angle of 87.17 (7)°.

In the title compound, C12H7N3O2S, the dihedral angle between the planes of the thia-zolo-pyridine ring system (r.m.s. deviation = 0.005 Å) and the benzene ring is 3.94 (6)°. The nitro group is rotated by 7.6 (2)° from its attached ring. In the crystal, extensive aromatic π-π stacking [shortest centroid-centroid separation = 3.5295 (9) Å] links the mol-ecules into (001) sheets.

In the title compound, C14H12ClN5, the di-hydro-pyridine ring adopts a shallow boat conformation. The dihedral angle between the plane of this ring and that of the chloro-benzene ring is 69.15 (15)°. In the crystal, mol-ecules are linked by N-H⋯N and N-H⋯Cl hydrogen bonds, generating (001) sheets.

In the title mol-ecule, C22H15Br2N3O2S, the central benzene ring forms dihedral angles of 12.39 (17), 56.66 (17) and 74.71 (19)°, respectively, with the mean planes of the thio-phene and two pyridine rings. The dioxane ring is in a half-chair conformation. An intra-molecular C-H⋯O hydrogen forms an S(6) ring. The amine N atom is sp (2)-hybridized.

The asymmetric unit in the structure of the title compound, C25H22NO2 (+)·Br (-)·0.5CH2Cl2·0.5H2O, comprises two pseudosymmetry-related cations, two bromide anions, a di-chloro-methane molecule and a water mol-ecule of solvation. The two independent cations are conformationally similar with the comparative dihedral angles between the central pyridine ring and the three benzene substituent rings...

The title compound, [Ir(C(11)H(8)N)(2)(C(17)H(19)O(2))], has an octa-hedral coordination geometry around the Ir(III) atom, retaining the cis-C,C,trans-N,N chelate disposition of the two 2-phenyl-pyridine ligands. The chelate rings are nearly mutually perpendicular [the inter-planar angles range from 85.48 (17) to 89.17 (19)°]. The two 2-(2-pyrid-yl)phenyl ligands are approximately planar, with ...

In the title mol-ecule, C(16)H(16)N(8)O(2), four atoms of the tetra-zine ring are coplanar, with the largest deviation from the plane being 0.0236 (12) Å; the other two atoms of the tetra-zine ring deviate on the same side from this plane by 0.320 (4) and 0.335 (4) Å. Therefore, the central tetra-zine ring exhibits a boat conformation. The dihedral angles between the mean plane of the four copl...

In the title complex, [Cd(C(6)H(11)N(2)S(2))(2)(C(5)H(5)N)(2)], the Cd(II) ion is hexa-coordinated by two N atoms from two pyridine ligands and by four S atoms from two dithio-carbamate ligands in a distorted octa-hedral geometry. The Cd(II) ion lies on a twofold axis. The piperazine ring is in chair conformation and its least-squares plane makes a dihedral angle of 81.4 (1)° with that of the p...