Abstract
In the title complex, [Ni(C26H26N2O4)]·2H2O, the NiII ion, lying on a twofold crystallographic rotation axis, has a square-planar geometry, being coordinated by the N2O2 unit of the tetradentate Schiff base ligand. The asymmetric unit of the title compound comprises one-half of the complex molecule and one of the water molecules of crystallization. The water H atoms form bifurcated O—H⋯(O,O) hydrogen bonds with the O atoms of the phenolato and ethoxy groups with R 1 2(5) and R 1 2(6) ring motifs. The dihedral angle between the central benzene ring and the two outer benzene rings are 4.07 (11) and 3.99 (12)°. The dihedral angle between the two O–Ni–N coordination planes is only 0.77 (11)°. In the crystal structure, the molecules are linked together into extended chains along the c axis by intermolecular O—H⋯O and C—H⋯O interactions. An interesting feature of the crystal structure is a short intermolecular C ⋯ C [3.355 (3) Å] contact, which is shorter than the sum of the van der Waals radii. The crystal structure may be further stabilized by intermolecular π–π interactions [centroid–centroid distances in the range 3.5758 (13)–3.6337 (13) Å].
Highlights
In the title complex, [Ni(C26H26N2O4)]2H2O, the NiII ion, lying on a twofold crystallographic rotation axis, has a squareplanar geometry, being coordinated by the N2O2 unit of the tetradentate Schiff base ligand
An interesting feature of the crystal structure is a short intermolecular C C [3.355 (3) Å] contact, which is shorter than the sum of the van der Waals radii
Symmetry codes: (i) −x+1, y, −z+1/2; (ii) x, −y, z+1/2
Summary
R factor = 0.046; wR factor = 0.122; data-to-parameter ratio = 21.8
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