In the title complex, [Ni(C23H28N2O4)]·H2O, the NiII ion is coordinated by the N2O2 unit of the tetradentate Schiff base ligand in a slightly distorted planar geometry. The asymmetric unit of the title compound comprises one complex molecule and a water molecule of crystallization. The H atoms of the water molecule make bifurcated intermolecular hydrogen bonds with the O atoms of the phenolate and ethoxy groups with R
1
2(5) and R
1
2(6) ring motifs, which may, in part, influence the molecular configuration. The dihedral angle between the two benzene rings is 31.43 (5)°. The crystal structure is further stabilized by intermolecular C—H⋯O and C—H⋯π interactions, which link neighbouring molecules into one-dimensional extended chains along the a axis. An interesting feature of the crystal structure is the short intermolecular C⋯C [3.3044 (14) Å] contact which is shorter than the sum of the van der Waals radii.
The title bis-Schiff base compound, C26H28N2O4·C2H6O·H2O, crystallizes as an ethanol and water solvate. Strong intramolecular O—H⋯N hydrogen bonds generate S(6) ring motifs. The water H atoms form bifurcated O—H⋯(O,O) intermolecular hydrogen bonds with the O atoms of the hydroxyl and ethoxy groups with R
1
2(5) ring motifs, which may, in part, influence the molecular configuration. The dihedral angles between the central benzene ring and the two outer benzene rings of the Schiff base molecule are 5.64 (8) and 44.78 (9)°. The crystal structure is further stabilized by intermolecular C—H⋯O and π–π interactions [centroid–centroid distances = 3.6139 (11)–3.7993 (11) Å].
In the title complex, [Cu(C23H28N2O4)]·H2O, the CuII ion has a distorted planar geometry, coordinated by the N2O2 unit of the tetradentate Schiff base ligand. The asymmetric unit comprises one complex molecule and a water molecule of crystallization. The water H atoms form bifurcated O—H⋯(O,O) intermolecular hydrogen bonds with the O atoms of the phenolate and ethoxy groups with R12(5) and R12(6) ring motifs, which may, in part, influence the molecular configuration. The dihedral angle between the two O—Cu—N coordination planes is 31.02 (6)° and the dihedral angle between the two benzene rings is 34.98 (7)°. In the crystal structure, molecules are linked together by intermolecular C—H⋯O interactions, forming extended chains along the a axis. The crystal structure is further stabilized by intermolecular C—H⋯π and π–π [centroid–centroid = 3.5068 (13) Å] interactions.
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