Abstract
Herein we reported the crystal structure of a dinuclear complex [{Zn<sup>II</sup>Na<sup>I</sup> (L)(EtOH)(NO<sub>3</sub>)]}] (2) obtained by reaction with the metalloligand [Zn(L)].(H<sub>2</sub>O) (1) and sodium nitrate. The metalloligand (1) and the dinuclear (2) complexes are characterized by IR and physical measurement. Spectroscopic evidence indicated that the Schiff base H<sub>2</sub>L behave an N<sub>2</sub>O<sub>2</sub>O’ <sub>2</sub> coordination tetradentate ligand. Suitable crystals of the compound 2 were grown by slow evaporation of ethanol solution for two weeks. The structure of 2 was elucidated by X-ray diffraction analysis. The compound crystallizes in the monoclinic crystal system with a space group of <i>P2<sub>1/c</sub></i>. The asymmetric unit of the compound contains one dideprotonated ligand molecule, on tetracoordinated zinc (II) ion, one heptacoordinated sodium(I) ion, one bidentate nitrate group and one coordinated ethanol molecule resulting in a structure formulated as [Zn(<i>µ</i>-<i>L</i>)Na(NO<sub>3</sub>)(EtOH)]. In the structure the Zn<sup>II</sup> ion is tetracoordinated and the environment around the zinc (II) is best described as a planar square geometry. The Na<sup>I</sup> ion is seven-coordinated in a severely distorted bipyramid pentagon environment. The interplanar angles between the two phenyl rings with a methoxy substituent is 4.208 (4)°, while the dihedral angle values of these groups with the phenyl carrying amino groups are respectively 7.499 (5)° and 11.594 (5)°. The Zn–Na distance is 3.4244 (9) Å. In the crystal structure numerous intramolecular and intermolecular hydrogen bonds link the molecules in a three-dimensional network.
Highlights
Chemists are increasingly interested in the design and synthesis of heteropolynuclear complexes of d and s-block elements owing to original structures with interesting properties in various fields such as magnetism [1, 2], catalysis [3, 4] and luminescence [5]
The Schiff base bis (2-hydroxy-3methoxybenzylidene)-1, 2-diaminobenzene, is widely used for synthetizing several 3d/Na heteronuclear complexes whose structures show that the element of s-block is still located in the larger open site, while the d-block element is situated in the smaller closed site [16, 17]
Organic molecules with phenolic oxygen atoms are perspective that the work we report focused on the use of the H2L Schiff base (H2L = N, N'-Phenylene-bis-(3-methoxysalicylideneimine)) which has two inners capable to encapsulate two ions of different natures
Summary
Chemists are increasingly interested in the design and synthesis of heteropolynuclear complexes of d and s-block elements owing to original structures with interesting properties in various fields such as magnetism [1, 2], catalysis [3, 4] and luminescence [5]. In the metal-ligand, the 3d element occupy the inner with the smaller size [8, 9] The reactions of these metal-ligand complexes with metallic centers of different natures can lead polynuclear compounds with very varied structures. Organic molecules with phenolic oxygen atoms are perspective that the work we report focused on the use of the H2L Schiff base (H2L = N, N'-Phenylene-bis-(3-methoxysalicylideneimine)) which has two inners capable to encapsulate two ions of different natures. It is in this context that we report the synthesis of a complex Zn2+/Na+ formulated as follows [Zn(μL)Na(NO3)(EtOH)].
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