Two Zn^IImononuclear coordination compounds with pyridinedicarboxylate and auxiliaryN-(pyridin-4-ylmethylidene)hydroxylamine ligands

Abstract

Two new mononuclear coordination compounds, bis{4-[(hydroxyimino)methyl]pyridinium} diaquabis(pyridine-2,5-dicarboxylato-κ(2)N,O(2))zincate(II), (C6H7N2O)2[Zn(C7H3NO4)2(H2O)2], (1), and (pyridine-2,6-dicarboxylato-κ(3)O(2),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.

A new CoIIcomplex of diniconazole: synthesis, crystal structure and antifungal activity

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Synthesis and crystal structure of a two-dimensional sodium coordination polymer of 4,4′-(diazenediyl)bis(1H-1,2,4-triazol-5-one)

“…All eight N atoms in the ZTO molecule have the potential to be coordinating atoms. Therefore, the ZTO ligand has a variety of potential coordination modes with metal centres (Vimal-Kumar & Radhakrishnan, 2011;Coropceanu et al, 2014;Wang et al, 2012). In addition, their structures contain a disproportionately large number of nitrogencontaining bonds, such as N-N, C-N, C N and N N (Sivabalan et al, 2006;Yang et al, 2008;Yan et al, 2015).…”