3,5-Diamino-4H-1,2,4-triazol-1-ium (6-carboxypyridine-2-carboxylato)(pyridine-2,6-dicarboxylato)cuprate(II) trihydrate

Abstract

Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.002 Å; R factor = 0.039; wR factor = 0.098; data-to-parameter ratio = 25.0.In the complex anion of the title compound, (C 2 H 6 N 5 )-[Cu(C 7 H 4 NO 4 )(C 7 H 3 NO 4 )]Á3H 2 O, the Cu II atom is coordinated by tridentate 6-carboxypyridine-2-carboxylate and pyridine-2,6-dicarboxylate ligands and is surrounded by four O atoms in the equatorial plane and two N atoms in axial positions in a distorted octahedral geometry. In the crystal, the components are linked into a three dimensional network by O-HÁ Á ÁO, N-HÁ Á ÁO, N-HÁ Á ÁN and C-HÁ Á ÁO hydrogen bonds and a -interaction with a centroid-centroid distance of 3.6080 (8) Å . Related literature

3,5-Diamino-4H-1,2,4-triazol-1-ium hydroxonium bis(pyridine-2,6-dicarboxylato)cobaltate(II) pyridine-2,6-dicarboxylic acid monohydrate

“…The two dipiconilate ligands are assembled approximately perpendicular to each other around the Co II ion with atoms O3 and O4 in the axial sites and atoms N1/N2/O1/O2 forming the equatorial sites. All bond lengths are in agreement with those common to related structures (Yousuf et al, 2011;Aghabozorg et al, 2009;Ramos Silva et al, 2008;Wang et al, 2004;MacDonald et al, 2000MacDonald et al, ,2004.…”

“…For the different coordination modes for transition metaldipicolinate complexes, see: Quaglieri et al (1972); Hakansson et al (1993); Okabe & Oya (2000); Aghajani et al (2009). For crystal structures of related complexes, see: Yousuf et al (2011); Aghabozorg et al (2009); Ramos Silva et al (2008); Wang et al (2004); MacDonald et al (2000,2004). For the stability of the temperature controller used in the data collection, see: Cosier & Glazer (1986).…”

“…It has been observed that providing suitable conditions for the transfer of acidic protons to appropriate bases will result in increased intermolecular interactions and stabilization of the resulting system (Aghajani et al, 2009). In recent work on the study of the structural features of molecules containing metal chelate and triazole rings, we have determined the crystal structure of a Cu(II) with a derivative of 1,2,4-triazole and dipicolinic acid (Yousuf et al, 2011). Herein, we report the crystal structure of the title complex (I).…”

“…A method similar to that reported by Yousuf et al (2011) was used. 1 mmol (0.099 g) of 3,5-diamino-1,2,4-triazole and 1 mmol of dipicolinic acid (0.167 g) were dissolved in a mixture of methanol/water solution (1:10, 11 ml).…”

Complexes of Eu(III), Tb(III) and Cu(II) with proton transfer compound between 2,6-pyridinedicarboxylic acid and 2-aminobenzothiazole: characterization of the structures and physical properties

“…The Cu-N bond distance for N from this ligand is slightly longer in comparison with Cu-N from the Pydc 2− ligand. In all three known structures containing [Cu(Pydc)(PydcH)] − , the coordination bond lengths of (PydcH) − are longer in comparison to those of Pydc 2− , which is probably due to the weaker attraction in the 1 in comparison with 2 ion, respectively [27][28][29]. The asymmetric unit of 5, shown in figure 6, consists of six symmetry independent ABT cations, six chlorides, and six water molecules.…”