RESUMO
In the title compound, C24H20N6O, the pyridin-3-yl groups on the ethyl-ene fragment are found in a trans conformation with a C(py)-C(e)-C(e)-C(py) (py = pyridine, e = ethylene) torsion angle of 179.2â (3)°. The dihedral angle between the pyridine rings is 3.5â (1)°. In the crystal, N-Hâ¯N and C-Hâ¯O=C inter-actions form a layer arrangement parallel to the bc plane. The compound displays disorder of the ethyl-ene fragment over two positions with an occupancy ratio of 0.676â (7) to 0.324â (7) that extends into the amide section of the nicotinamide moiety.
RESUMO
The asymmetric unit of the title compound, (C12H16N3O)2[PdCl4]3, consists of a 4,4'-(1-aza-niumyl-2-hy-droxy-ethane-1,2-di-yl)dipyridinium dication and one and a half tetra-chloridopalladate(II) anions; the latter has inversion symmetry. In the cation, the pyridinium rings attached to the central 1-aza-niumyl-2-hy-droxy-ethane fragment show an anti conformation, as indicated by the central C-C-C-C torsion angle of -178.1â (4)°, and they are inclined to one another by 25.7â (2)°. In the crystal, the cations and anions are linked through N-Hâ¯Cl and O-Hâ¯Cl hydrogen bonds. There are also π-π contacts [centroid-centroid distance = 3.788â (3)â Å] and a number of C-Hâ¯O and C-Hâ¯Cl inter-actions are present, consolidating the formation of a three-dimensional structure.
RESUMO
In the solid state, the structure of the title compound, C(18)H(15)N(5), is stabilized by weak C-Hâ¯N interactions. Mol-ecules are arranged in layers parallel to the bc plane forming an inter-esting supra-molecular structure.
RESUMO
The binuclear title compound, [Cu(2)(CH(3)CO(2))(4)(C(6)H(5)NO)], is located about a center of inversion. The Cu(II) atoms are connected [Cu-Cu = 2.6134â (5)â Å] and bridged by four acetate ligands. Their distorted octa-hedral coordination geometry is completed by a terminal pyridine N atom of a 3-pyridincarboxaldehyde ligand. In the crystal, the complex mol-ecules are linked by C-Hâ¯O hydrogen bonds, forming two-dimensional networks lying parallel to the ab plane. These networks are linked via C-Hâ¯O hydrogen bonds involving inversion-related 3-pyridinecarboxaldehyde ligands, forming a three dimensional supra-molecular architecture.
RESUMO
In the solid state, the structure of the title compound, C(16)H(18)N(4)O(2), is stabilized by inter-molecular N-Hâ¯O and O-Hâ¯O hydrogen bonds. These hydrogen bonds arrange the mol-ecules into a double-layer supra-molecular structure. The mol-ecular conformation is is consolidated by an intra-molecular N-Hâ¯N hydrogen bond. The dihedral angle between the aromatic rings is 8.01â (10)°