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In order to examine the possibility of using yttrium(III) in the crystal engineering of hydrogenbonded coordination complexes and to compare the molecular and supramolecular YIII/Cl 3  or NO 3  - /DMU chemistry with the already well-developed Ln III /Cl −  or NO 3  − /DMU chemistry (Ln III  = lanthanide, DMU = N,N’-dimethylurea), compounds [Y(DMU) 6 ][YCl 6 ] (1) and [Y(NO 3 ) 3 (DMU) 3 ] (2) have been prepared. The structures of both compounds have been determined by single-crystal Xray diffraction. The structure of 1 consists of octahedral [Y(DMU) 6 ] 3+  and [YCl 6 ] 3−  ions. The Y III  ion in 2 is nine-coordinate and ligation is provided by three O-bonded DMU ligands and three bidentate chelating nitrato groups; the coordination polyhedron about the metal can be viewed as a distorted, monocapped square antiprism. The [Y(DMU) 6 ] 3+  cations and [YCl 6 ] 3−  anions self-assemble to form a hydrogen-bonded 3D architecture in 1. Most of the hydrogen-bonding functionalities on the components of 2 create also a 3D network. Two motifs of interionic/intramolecular hydrogen-bonds have been observed: N-H···Cl in 1 and N-H···O(NO 3  − ) in 2. The IR data are discussed in terms of the nature of bonding and the structures of the two complexes

zeitschrift für naturforschung b

Hydrogen-Bonded Networks Featuring Yttrium(III) Complexes of N,N’-Dimethylurea (DMU): Preparation and Characterization of [Y(DMU) 6 ][YCl 6 ] and [Y(NO 3 ) 3 (DMU) 3 ]