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. 2025 Jan 1;81(Pt 1):85-89.
doi: 10.1107/S2056989024012349.

Crystal structure of di-μ-acetato-κ4 O: O'-bis{(acetato-κ2 O, O')tetra-aqua-[1-(pyridin-2-yl-methylidene-κ N)-2-(pyridin-2-yl-κ N)hydrazine-κ N 1]lanthanum(III)} dinitrate hemihydrate

Mbossé Ndiaye-Gueye  1 , Bocar Traoré  1 , Ibrahima Elhadji Thiam  1 , Ousmane Diouf  1 , Emmanuel Wenger  2 , Abdou Salam Sall  1 , Claude Lecomte  2 , Mohamed Gaye  1
Affiliations

Crystal structure of di-μ-acetato-κ4 O: O'-bis{(acetato-κ2 O, O')tetra-aqua-[1-(pyridin-2-yl-methylidene-κ N)-2-(pyridin-2-yl-κ N)hydrazine-κ N 1]lanthanum(III)} dinitrate hemihydrate

Mbossé Ndiaye-Gueye et al. Acta Crystallogr E Crystallogr Commun. .

Abstract

In the binuclear title complex, [La2(C2H3O2)4(C11H10N4)(H2O)4](NO3)2·0.5H2O, the two lanthanum ions are nine coordinate in a distorted trigonal-prismatic geometry. Each LaIII ion is bonded to three N atoms of the Schiff base, 1-(pyridin-2-yl)-2-(pyridin-2-yl-methyl-ene)hydrazine and is coordinated by one acetate group, which acts in η 2-bidentate mode and two acetate groups that act in μ 2-mode between the two LaIII ions. Two η 1-water mol-ecules complete the coordination sphere. All bond lengths in the coordination environment of the LaIII ion are slightly larger than those observed in the isostructural NdIII and SmIII complexes. The LaIII⋯LaIII distance is 4.6696 (6) Å. In the crystal, extensive O-H⋯O hydrogen-bonding inter-actions involving the coordinated water mol-ecules and the non-coordinating nitrate anions, as well as the oxygen atoms of the acetate groups, generate an overall three-dimensional supra-molecular network.

Keywords: 2-hydrazino­pyridine,hydrazone; crystal structure; lanthanum.

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Figures

Figure 1
Figure 1
A view of the title compound, showing the atom-numbering scheme for the asymmetric unit. Displacement ellipsoids are drawn at the 30% probability level.
Figure 2
Figure 2
The nature of disorder of the ligand and nitrate anion.
Figure 3
Figure 3
A partial packing plot showing diperiodic sheets that extend parallel to the bc plane.
See this image and copyright information in PMC

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