New multidimensional coordination polymers with μ2- and μ3-dcno cyano carbanion ligand {dcno- = [(NC)2CC(O)O(CH2)2OH]-}

New polymeric materials [M(dcno)(2)(H2O)(2)] [M = Fe-II (1), Co-II (2)] and [M(dcno)21 [M = Cu-II (3), Mn-II (4)] with dcno(-) = [(NC)(2)CC(O)O(CH2)(2)OH](-) = 2,2-dicyano-1-(2-hydroxyethoxy)ethenolate anion have been synthesised and characterised by IR spectroscopy, X-ray crystallography and magnetic measurements. In compounds I and 2, each organic ligand acts in a bridging mode with its two nitrogen atoms bound to two different metal ions, while in compounds 3 and 4, each organic anion acts as a mu(3)-bridging ligand through its two nitrogen atoms and the oxygen atom of the OH group. Each metal ion has a pseudo-octahedral trans-MN4O2 environment with four nitrogen atoms from four different organic ligands and two oxygen atoms from two water molecules in compounds I and 2 and from the OH group of the cyanocarbanion ligand in compounds 3 and 4. These coordination modes give rise to 1D, 2D and 3D arrangements for compounds 1, 2 and 3-4, respectively. Magnetic measurements show weak antiferromagnetic coupling between metal centres in the four compounds. (c) Wiley-VCH Verlag GmbH & Co. KGaA.