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In the title heterodinuclear complex, [CuNa(BF4)(C8H7O3)2]n, the CuII ion is four-coordinated by four O atoms of two 2-formyl-6-meth­oxy­phenolate ligands, giving rise to a square-planar geometry. The Na+ ion is six-coordinated by four O atoms from the two ligands and two F atoms of two tetra­fluoridoborate anions. The tetra­fluoridoborate anion links the Na+ ions, forming a one-dimensional structure along [001]. Three F atoms of the tetra­fluoridoborate anion are disordered over two sets of sites, with an occupancy ratio of 0.790 (11):0.210 (11).

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The title compound, C10H7N5O2, was synthesized by the reaction of 4-nitro­aniline and 2,3-dicyano­propionic acid ethyl ester. In the crystal, N—H...O and C—H...O hydrogen bonds link the mol­ecules, forming a three-dimensional network.

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In the crystal structure of the title compound, C33H39N3O10·C3H6O, the acetone mol­ecule is encapsulated into the cavity of the cryptand and fixed by two N—H...O and one C—H...O hydrogen bond. C—H...O and C—H...N inter­actions link neighbouring cryptands. The dihedral angles between the pyridine ring and the benzene rings are 86.47 (17) and 85.53 (13)°.

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In the title compound, C10H8N2·C4H8N2O2, both the dimethyl­glyoxime and the 4,4′-bipyridine mol­ecules have crystallographic Ci symmetry. The mol­ecules stack along the a-axis direction with a dihedral angle of 20.4 (8)° between their planes. In the crystal, the components are linked by O—H...N hydrogen bonds into alternating chains along [120] and [1\overline20].
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