Crystal structure of a three-dimensional neodymium(III) coordination polymer, [Nd(2)(H(2)O)(6)(glutarato)(SO(4))(2)] (n).

A three-dimensional coordination polymer, poly[hexa-aqua-(μ(4)-glutarato)bis(μ(3)-sulfato)-dineodymium(III)], [Nd(2)(glutarato)(SO(4))(2)(H(2)O)(6)] (n) (glutarato(2-) = C(5)H(6)O(4) (2-)), 1, consisting of cationic {Nd(2)(H(2)O)(6)(SO(4))(2)} (n) (2n+) layers linked by bridging glutarate ligands, was synthesized by the microwave-heating technique within few minutes. The crystal structure of 1 consists of two crystallographically independent TPRS-{Nd(III)O(9)} (TPRS is tricapped trigonal-prismatic geometry) units that form an edge-sharing dinuclear cluster inter-connected to neighbouring dimers by the μ(3)-SO(4) (2-) anions, yielding a cationic two-dimensional {Nd(2)(H(2)O)(6)(SO(4))(2)} (n) (2n+) sheet. Adjacent cationic layers are then linked via the μ(4)-glutarato(2-) ligands into a three-dimensional coordination network. Strong O-H⋯O hydrogen bonds are the predominant inter-action in the crystal structure.