Two ZnII mononuclear coordination compounds with pyridinedicarboxylate and auxiliary N-(pyridin-4-yl-methylidene)hydroxylamine ligands

Coropceanu Eduard; Dreab Ana; Croitor Lilia

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COROPCEANU, Eduard, DREAB, Ana, CROITOR, Lilia. Two ZnII mononuclear coordination compounds with pyridinedicarboxylate and auxiliary N-(pyridin-4-yl-methylidene)hydroxylamine ligands. In: Acta crystallographica. Section C, Structural chemistry, 2014, vol. 70, pp. 1101-1104. ISSN 2053-2296. DOI: https://doi.org/10.1107/S2053229614023109

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Acta crystallographica. Section C, Structural chemistry

Volumul 70 / 2014 / ISSN 2053-2296

Two Zn^II mononuclear coordination compounds with pyridinedicarboxylate and auxiliary N-(pyridin-4-yl-methylidene)hydroxylamine ligands

DOI:https://doi.org/10.1107/S2053229614023109

Pag. 1101-1104

Coropceanu Eduard¹, Dreab Ana², Croitor Lilia³

¹ Institute of Chemistry of the Academy of Sciences of Moldova,
² Tiraspol State University,
³ Institute of Applied Physics, Academy of Sciences of Moldova

Disponibil în IBN: 8 noiembrie 2023

Rezumat

Two new mononuclear coordination compounds, bis{4-[(hydroxyimino)methyl]pyridinium} diaquabis(pyridine-2,5-dicarboxylato-κ²N,O²)zincate(II), (C₆H₇N₂O)₂[Zn(C₇H₃NO₄)₂(H₂O)₂], (1), and (pyridine-2,6-dicarboxylato-κ³O²,N,O ⁶)bis[N-(pyridin-4-ylmethylidene-κN)hydroxylamine]zinc(II), [Zn(C₇H₃NO₄)(C₆H₆N₂O)₂], (2), have been synthesized and characterized by single-crystal X-ray diffractometry. The centrosymmetric Zn^II cation in (1) is octahedrally coordinated by two chelating pyridine-2,5-dicarboxylate ligands and by two water molecules in a distorted octahedral geometry. In (2), the Zn^II cation is coordinated by a tridentate pyridine-2,6-dicarboxylate dianion and by two N-(pyridin-4-ylmethylidene)hydroxylamine molecules in a distorted C₂-symmetric trigonal bipyramidal coordination geometry.

Cuvinte-cheie
crystal structure, N-(pyridin-4-ylmethylidene)hydroxylamine, pyridine-2 5-dicarboxylic acid, pyridine-2 6-dicarboxylic acid, zinc(II) complexes

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<cfAbstr cfLangCode='EN' cfTrans='o'><p>Two new mononuclear coordination compounds, bis{4-[(hydroxyimino)methyl]pyridinium} diaquabis(pyridine-2,5-dicarboxylato-&kappa;<sup>2</sup>N,O<sup>2</sup>)zincate(II), (C<sub>6</sub>H<sub>7</sub>N<sub>2</sub>O)<sub>2</sub>[Zn(C<sub>7</sub>H<sub>3</sub>NO<sub>4</sub>)<sub>2</sub>(H<sub>2</sub>O)<sub>2</sub>], (1), and (pyridine-2,6-dicarboxylato-&kappa;<sup>3</sup>O<sup>2</sup>,N,O&nbsp;<sup>6</sup>)bis[N-(pyridin-4-ylmethylidene-&kappa;N)hydroxylamine]zinc(II), [Zn(C<sub>7</sub>H<sub>3</sub>NO<sub>4</sub>)(C<sub>6</sub>H<sub>6</sub>N<sub>2</sub>O)<sub>2</sub>], (2), have been synthesized and characterized by single-crystal X-ray diffractometry. The centrosymmetric Zn<sup>II</sup>&nbsp;cation in (1) is octahedrally coordinated by two chelating pyridine-2,5-dicarboxylate ligands and by two water molecules in a distorted octahedral geometry. In (2), the Zn<sup>II</sup>&nbsp;cation is coordinated by a tridentate pyridine-2,6-dicarboxylate dianion and by two N-(pyridin-4-ylmethylidene)hydroxylamine molecules in a distorted C<sub>2</sub>-symmetric trigonal bipyramidal coordination geometry.&nbsp;</p></cfAbstr>
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