318 research outputs found
Bis{(E)-2-[(2-chloro-3-pyridyl)iminomethyl]-6-methoxyphenolato-κ2 N,O 1}copper(II)
In the title mononuclear copper(II) complex, [Cu(C13H10ClN2O2)2], the CuII ion, lying on an inversion center, is four-coordinated in a trans-CuN2O2 square-planar geometry by two phenolate O and two imino N atoms from two symmetry-related N,O-bidentate Schiff base ligands. The shortest Cu⋯Cu distance is 7.5743 (9) Å. However, there are weak intramolecular electrostatic interactions between the Cu atom and the Cl atom of the ligand, with a Cu⋯Cl distance of 3.3845 (9) Å
2,2′-[1,1′-(Propane-1,3-diyldioxydinitrilo)diethylidyne]diphenol
The title compound, C19H22N2O4, was synthesized by the reaction of 2′-hydroxyacetophenone with 1,3-bis(aminooxy)propane in ethanol. Intramolecular O—H⋯N and weak C—H⋯O hydrogen bonds stabilize the three-dimensional structure. A twofold rotation axis passes through the molecule
2,2′-Dichloro-1,1′-[(propane-1,3-diyldioxy)bis(nitrilomethylidyne)]dibenzene
The title compound, C17H16Cl2N2O2, assumes a V-shape configuration with a dihedral angle between the two halves of the molecule of 79.60 (4)°. The asymmetric unit comprises one half-molecule with a crystallographic twofold rotation axis passing through the central C atom. There are weak intermolecular π–π stacking interactions between neighbouring benzene rings with intermolecular plane-to-plane distances of 3.277 (6) and 3.465 (5) Å along the a and c axes, respectively. In the crystal structure, weak intermolecular C—H⋯O bonds link each molecule to four others to form an infinite three-dimensional network
2,2′-[1,1′-(Propane-1,3-diyldioxydinitrilo)diethylidyne]di-1-naphthol
The molecule of the title compound, C27H26N2O4, lies across a crystallographic inversion centre and adopts an l-shaped configuration. Within the molecule, the two naphthalene units are approximately perpendicular, making a dihedral angle of 80.24 (5)°. The two intramolecular O—H⋯N hydrogen bonds, generate S(6) ring motifs. In the crystal structure, every molecule links five other molecules into an infinite cross-linked layered supramolecular structure via intermolecular C—H⋯O hydrogen bonds, C—H⋯π interactions and π–π stacking interactions [centroid–centroid distance = 3.956 (4) Å]
Bis{(E)-2-[1-(ethoxyimino)ethyl]-1-naphtholato-κ2 N,O 1}copper(II)
In the title complex, [Cu(C14H14NO2)2], the discrete complex molecules have crystallographic inversion symmetry. The slightly distorted square-planar coordination sphere of the CuII atom comprises two phenolate O atoms and two oxime N atoms from two bidentate–chelate 2-[1-(ethoxyimino)ethyl]-1-naphtholate O-ethyl oxime (L
−) ligands [Cu—O = 1.8919 (17) Å and Cu—N = 1.988 (2) Å]. The two naphthalene ring systems in the molecule are parallel, with a perpendicular interplanar spacing of 1.473 (2) Å, while each complex unit forms links to four other molecules via intermolecular methyl C—H⋯π interactions, giving an infinite cross-linked layered supramolecular structur
6,6′-Dimethoxy-2,2′-[(hexane-1,6-diyldioxy)bis(nitrilomethylidyne)]diphenol
In the title compound, C22H28N2O6, strong intramolecular O—H⋯N hydrogen bonds and weak intermolecular C—H⋯O hydrogen bonds stabilize the three-dimensional supramolecular structure
Bis{(E)-4-bromo-2-[(2-chloro-3-pyridyl)iminomethyl]phenolato-κ2 N,O}copper(II)
In the title complex, [Cu(C12H7BrClN2O)2], the CuII center is tetracoordinated by two phenolate O and two azomethine N atoms from two independent bidentate 4-bromo-2-[(2-chloro-3-pyridyl)iminomethyl]phenolate (L) ligands. In the crystal structure, the CuII atom has a distorted square-planar coordination environment. The interplanar dihedral angles between the benzene and pyridine rings in the individual ligands are 63.83 (4) and 54.43 (3)°, indicating the pyridine ring to have considerably weaker steric hindrance
5,5′-Bis(diethylamino)-2,2′-[butane-1,4-diyldioxybis(nitrilomethylidyne)]diphenol
The title complex, C26H38N4O4, was synthesized by the reaction of 4-diethylamino-2-hydroxybenzaldehyde with 1,4-bis(aminooxy)butane in ethanol. It crystallizes as discrete centrosymmetric molecules adopting an extended conformation where the two salicylaldoxime groups are separated from each other. Intramolecular O—H⋯N hydrogen bonding is observed between the hydroxy groups and oxime N atoms. Intermolecular π–π stacking interactions [3.979 (2) Å] between aromatic rings are apparent in the crystal structure. Each ethyl group is disordered over two positions; in one the site occupancy factors are 0.55 and 0.45, in the other 0.53 and 0.47
4-[1-(Hydroxyimino)ethyl]-N-(4-nitrobenzylidene)aniline
In the title compound, C15H13N3O3, the dihedral angle formed by the two benzene rings is 44.23 (2)°. The crystal structure is stabilized by aromatic π–π stacking interactions, with centroid-centroid distances of 3.825 (3) and 3.870 (4) Å between the aniline and the nitrobenzene rings of neighbouring molecules, respectively. In addition, the stacked molecules exhibit intermolecular C—H⋯N and C—H⋯O interactions
4,4′-Dimethyl-1,1′-[ethylenedioxybis(nitrilomethylidyne)]dibenzene
The Schiff base, C18H20N2O2, which lies about an inversion centre, adopts a linear conformation. The molecules are packed by C—H⋯π interactions, forming a two-dimensional supramolecular network
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