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Di-aqua-bis-{?-1,5-bis-[(pyridin-2-yl)methyl-idene]carbonohydrazide(1-)}di-?-chlorido-tetra-chlorido-tetra-zinc(II).


ABSTRACT: A tetra-nuclear ZnII complex, [Zn4(C13H11N6O)2Cl6(H2O)2] or {[Zn2(HL)(H2O)(Cl2)](?Cl)2[Zn2(HL)(H2O)(Cl)]}2, was synthesized by mixing an equimolar amount of a methanol solution containing ZnCl2 and a methanol solution containing the ligand H2 L [1,5-bis-(pyridin-2-yl-methyl-ene)carbono-hydrazide]. In the tetra-nuclear complex, each of the two ligand mol-ecules forms a dinuclear unit that is connected to another dinuclear unit by two bridging chloride anions. In each dinuclear unit, one ZnII cation is penta-coordinated in a N2OCl2 in a distorted square-pyramidal geometry, while the other ZnII cation is hexa-coordinated in a N3OCl2 environment with a distorted octa-hedral geometry. The basal plane around the penta-coordinated ZnII cation is formed by one chloride anion, one oxygen atom, one imino nitro-gen atom and one pyridine nitro-gen atom with the apical position occupied by a chloride anion. The basal plane of the hexa-coordinated ZnII cation is formed by one chloride anion, one hydrazinyl nitro-gen atom, one imino nitro-gen atom and one pyridine nitro-gen atom with the apical positions occupied by a water oxygen atom and a bridged chloro anion from another dinuclear unit, leading to a tetra-nuclear complex. A series of intra-molecular C-H?Cl hydrogen bonds is observed in each tetra-nuclear unit. In the crystal, the tetra-nuclear units are connected by inter-molecular C-H?Cl, C-H?O and N-H?O hydrogen bonds, forming a planar two-dimensional structure in the ac plane.

SUBMITTER: Seck TM 

PROVIDER: S-EPMC7405581 | biostudies-literature | 2020 Aug

REPOSITORIES: biostudies-literature

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Di-aqua-bis-{μ-1,5-bis-[(pyridin-2-yl)methyl-idene]carbonohydrazide(1-)}di-μ-chlorido-tetra-chlorido-tetra-zinc(II).

Seck Thierno Moussa TM   Gaye Papa Aly PA   Ndoye Cheikh C   Thiam Ibrahima Elhadji IE   Diouf Ousmane O   Retailleau Pascal P   Gaye Mohamed M  

Acta crystallographica. Section E, Crystallographic communications 20200724 Pt 8


A tetra-nuclear Zn<sup>II</sup> complex, [Zn<sub>4</sub>(C<sub>13</sub>H<sub>11</sub>N<sub>6</sub>O)<sub>2</sub>Cl<sub>6</sub>(H<sub>2</sub>O)<sub>2</sub>] or {[Zn<sub>2</sub>(HL)(H<sub>2</sub>O)(Cl<sub>2</sub>)](μCl)<sub>2</sub>[Zn<sub>2</sub>(HL)(H<sub>2</sub>O)(Cl)]}<sub>2</sub>, was synthesized by mixing an equimolar amount of a methanol solution containing ZnCl<sub>2</sub> and a methanol solution containing the ligand H<sub>2</sub> <i>L</i> [1,5-bis-(pyridin-2-yl-methyl-ene)carbono-hydrazid  ...[more]

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