Publication
Title
Hydrogen bonded networks based on lanthanide(III) complexes of N,N '-dimethylurea (DMU): preparation, characterisation, and crystal structures of and
Author
Abstract
In order to examine the possibilities of using lanthanide(III) ions in the crystal engineering of hydrogen bonded coordination complexes, the compounds [Ln(DMU)(6)][LnCl(6)] and [Ln(NO3)(3)(DMU)(3)] (Ln = Pr, Nd, Gd, Er; DMU = N,N'-dimethylurea) have been prepared from the reactions of DMU with the appropriate lanthaniae(III) salts in alcohols. The representative complexes [Nd(DMU)(6)][NdCl6] (2) and [Nd(NO3)(3)(DMU)(3)] (6) have been structurally characterised by single-crystal X-ray studies. The structure of 2 consists of distorted octahedral [Nd(DMU)(6)](3+) and [NdCl6](3-) ions. In the molecules of 6, the Nd(III) ion is in a ninecoordinate, monocapped square antiprismatic geometry, surrounded by three O-bonded DMU ligands and three bidentate chelating nitrate groups. The [Nd(DMU)(6)](3+) cations and [NdCl6](3 -) anions self-assemble to form a hydrogen-bonded 3D architecture in 2. The hydrogen bonding functionalities on the molecules of 6 create also a 3D structure. Two main motifs of interionic/intermolecular hydrogen bonds have been observed: N-H... Cl in 2 and N-H... O(NO3-) in 6; weak C-H... Cl hydrogen bonding interactions are also present in 2. The complexes were characterised by magnetic susceptibilities at room temperature and spectroscopic (IR, far-IR, Raman) techniques. The vibrational data are discussed in terms of the nature of bonding and the known structures of the neodymium(III) complexes. (C) 2003 Elsevier Science Ltd. All rights reserved.
Language
English
Source (journal)
Polyhedron. - Oxford
Publication
Oxford : 2003
ISSN
0277-5387
Volume/pages
22:6(2003), p. 825-835
ISI
000181591600004
Full text (Publishers DOI)
Full text (publishers version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 29.02.2012
Last edited 24.05.2017
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