Poly[piperazinediium [aquabis(μ-pyridine-2,5-dicarboxylato)zincate] dihydrate]

Abstract

Key indicators: single-crystal X-ray study; T = 100 K; mean (C-C) = 0.002 Å; R factor = 0.025; wR factor = 0.069; data-to-parameter ratio = 20.0.The polymeric title compound, {(C 4 H 12 N 2 )[Zn(C 7 H 3 NO 4 ) 2 -(H 2 O)]Á2H 2 O} n , was obtained by the reaction of zinc(II) nitrate hexahydrate with the proton-transfer compound (pipzH 2 )(py-2,5-dc) (where pipz is piperazine and py-2,5-dcH 2 is pyridine-2,5-dicarboxylic acid) in aqueous solution. Each Zn II atom is coordinated in a distorted octahedral geometry by four O atoms and two N atoms from one water molecule and two (py-2,5-dc) 2-ligands, which also act as bridging ligands between Zn II atoms. -Stacking interactions between two aromatic rings of (py-2,5-dc) 2-fragments, with centroid-centroid distances of 3.4747 (7) and 3.7081 (7) Å are observed. The crystal structure is stabilized by O-HÁ Á ÁO and N-HÁ Á ÁO hydrogen bonds. Related literature

Synthesis, crystal structure, spectroscopic and thermal characterization of (Hampy)2[Ni(pydc)2(H2O)2] · 2 H2O

“…, which are different with those in similar complexes [8][9][10][11][12]. The pydc ligand is almost planar and the dihedral angle between the pydc ligand and uncoordinated carboxyl group is 15.0 .…”

“…Some supramolecular motifs of hydrogen bonding patterns of symmetric and translational repetitive occurrence are important in the crystal and chemical engineering and technology [7]. To the best of our knowledge, the single-crystal X-ray structures of proton transfer compounds with 2,5-pyridinedicarboxylic acid, (Him) 2 [12] were also reported.…”

Poly[[tri-μ3-hydroxido-tris(μ4-pyridine-2,5-dicarboxylato)trineodymium(III)] monohydrate]

“…For the importance of the 2,5-pyridine dicarboxylate ligand, see: Qin et al (2005); Song et al (2005); Huang, Jiang et al (2008); Huang et al (2007). For related coordination polymers involving 2,5-pyridine dicarboxylate ligands, see: Aghabozorg et al (2008); Xu et al (2008); Colak et al (2010). For the use of compounds with M-O-M frameworks, see: Huang et al (2007); Price et al (2001); Huang, Song et al (2008); Zhang et al (2009).…”

Poly[aqua(dimethyl sulfoxide)(μ4-pyridine-2,5-dicarboxylato)calcium(II)]

“…For related coordination polymers involving pyridine-2,5dicarboxylic acid, see: Aghabozorg, Derikvand et al (2008); Aghabozorg, Manteghi & Sheshmani (2008); Xu et al (2008); Sun et al (2006); Ç olak et al (2010); Wang et al (2009); Xie et al (2009).…”

“…Pyridine-2,5-dicarboxylic acid (py-2,5-dcH 2 ) has unique features because of the presence of two carboxylate groups (O donor atoms) and the pyridine ring (N donor atom), which aids to increase the dimensionality of the assembled covalent network. Therefore, it is most likely that py-2,5-dcH 2 will form low symmetric structures with metals (Aghabozorg, Derikvand, et al, 2008;Xu et al, 2008;Çolak et al, 2010). Our research group has recently focused on one-pot synthesis of water soluble self-assembly systems that can function as suitable ligands in the synthesis of metal complexes (Aghabozorg, Manteghi & Sheshmani, 2008).…”