Work

Crystal structure of di-μ-acetato-κ 4 O : O′ -bis{(acetato-κ 2 O , O ′)tetraaqua[1-(pyridin-2-ylmethylidene-κ N )-2-(pyridin-2-yl-κ N )hydrazine-κ N 1 ]lanthanum(III)} dinitrate hemihydrate

Year: 2024

Type: article

Abstract: In the binuclear title complex, [La 2 (C 2 H 3 O 2 ) 4 (C 11 H 10 N 4 )(H 2 O) 4 ](NO 3 ) 2 ·0.5H 2 O, the two lanthanum ions are nine coordinate in a distorted trigonal–prismatic geometry. Each La III ion is bonded to three N atoms of the Schiff base, 1-(pyridin-2-yl)-2-(pyridin-2-ylmethylene)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 La III ions. Two η 1 -water molecules complete the coordination sphere. All bond lengths in the coordination environment of the La III ion are slightly larger than those observed in the isostructural Nd III and Sm III complexes. The La III ...La III distance is 4.6696 (6) Å. In the crystal, extensive O—H...O hydrogen-bonding interactions involving the coordinated water molecules and the non-coordinating nitrate anions, as well as the oxygen atoms of the acetate groups, generate an overall three-dimensional supramolecular network.

Source: Acta Crystallographica Section E Crystallographic Communications

DOI: 10.1107/s2056989024012349