Catena-Poly[diammonium [diaquabis(pyridine-2,4-dicarboxylato-κ2N,O2)cuprate(II)] [[diaquacopper(II)]-μ-pyridine-2,4-dicarboxylato-κ3N,O2:O2′-[tetraaquacadmium(II)]-μ-pyridine-2,4-dicarboxylato-κ3O2:N,O2′] hexahydrate

Guan-Hua Wang,Zhi-Gang Li,Ning-Hai Hu,Heng-Qing Jia,Jing-Wei Xu

doi:10.1107/s1600536809046911

Abstract

The title mixed-metal complex, {(NH4)2[Cu(C7H3NO4)2(H2O)2][CdCu(C7H3NO4)2(H2O)6]·6H2O}n, contains one octahedrally coordinated CdII center and two octahedrally coordinated CuII centers, each lying on an inversion center. The two CuII atoms are each coordinated by two O atoms and two N atoms from two 2,4-pydc (2,4-H2pydc = pyridine-2,4-dicarboxylic acid) ligands in the equatorial plane and two water molecules at the axial sites, thus producing two crystallographically independent [Cu(2,4-pydc)2(H2O)2]2− metalloligands. One metalloligand exists as a discrete anion and the other connects the Cd(H2O)4 units, forming a neutral chain. O—H⋯O and N—H⋯O hydrogen bonds connects the polymeric chains, complex anions, ammonium cations and uncoordinated water molecules into a three-dimensional supramolecular network.

Highlights

The State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s
The title mixed-metal complex, {(NH4)2[Cu(C7H3NO4)2(H2O)2][CdCu(C7H3NO4)2(H2O)6]6H2O}n, contains one octahedrally coordinated CdII center and two octahedrally coordinated CuII centers, each lying on an inversion center
The two CuII atoms are each coordinated by two O atoms and two N atoms from two 2,4-pydc (2,4-H2pydc = pyridine-2,4dicarboxylic acid) ligands in the equatorial plane and two water molecules at the axial sites, producing two crystallographically independent [Cu(2,4-pydc)2(H2O)2]2

Summary

Structure Reports

ISSN 1600-5368 catena-Poly[diammonium [diaquabis(pyridine-2,4-dicarboxylato-j2N,O2)cuprate(II)] [[diaquacopper(II)]-l0 pyridine-2,4-dicarboxylato-j3N,O2:O2 [tetraaquacadmium(II)]-l-pyridine-2,40 dicarboxylato-j3O2:N,O2 ] hexahydrate]. The State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, People’s. R factor = 0.026; wR factor = 0.073; data-to-parameter ratio = 11.7

Crystal data

Related literature

The authors thank the Changchun Institute of Applied

Graphite monochromator φ and ω scans