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 2 n + 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 2 n + 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.