Poly[[tris-(μ(2)-4,4'-bipyridine N,N'-di-oxide)hexa-nitratodieuropium(III)] dichloro-methane disolvate]

The title one-dimensional coordination network, {[Eu(2)(NO(3))(6)(C(10)H(8)N(2)O(2))(3)]·2CH(2)Cl(2)}(n), is isostructural with the previously reported Tb and Tl coordination networks and to its Gd analog. The Eu(III) cation is coordinated in a distorted tricapped trigonal-prismatic fashion by nine O atoms from three bridging 4,4'-bipyridine N,N'-dioxide ligands and three chelating nitrate anions. None of the atoms lie on a special position, but there is an inversion center located between the rings of one of the ligands. The network topology is ladder-like, and each ladder inter-acts with six neighboring ladders through C-H⋯O hydrogen bonds. The packing motif of the ladders allows for the formation of channels that run parallel to the a axis; these channels are filled with CH(2)Cl(2) solvent mol-ecules that inter-act with the ladders through C-H⋯O hydrogen bonds.