HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Molecular assemblies based on tricyanomethanide units and copper(II) ions

Abstract : New co-ordination polymers of formulae [Cu(tcm)2(tn)] (1) and [Cu(tcm)(tn)2](tcm) (2) (tcm-=tricyanomethanide and tn=1,3-diaminopropane) have been synthesised and characterised by X-ray crystallography and magnetic measurements. For compound 1, the Cu(II) ion presents an elongated and distorted CuN4N1N1 octahedron generated by one chelating tn ligand and by four μ 2-bridging tcm- ligands. The molecular arrangement of 1 can be described as a monodimensional chain of a ladder-like structure in which the Cu⋯Cu distance (7.5157(4) Å) through the tcm- ligand forming the sides is significantly shorter than the corresponding distance observed through that providing the rung (7.7455(4) Å). For compound 2, the Cu(II) ion presents a centrosymmetric elongated CuN 4N2 octahedron; the equatorial plane is generated by two chelating tn ligands and the two axial positions are filled by two weakly co-ordinated equivalent tcm- units acting as μ2- bridging ligands. This leads to a monodimensional polymer in which the intrachain Cu⋯Cu distance is 9.1062(2) Å. Magnetic measurements, performed in the temperature range 2-300 K for both compounds, show weak antiferromagnetic interactions for compound 1 while compound 2 obeys a Curie law. The difference between the magnetic behaviours can be explained from the larger intrachain Cu⋯Cu separation in 2 than in 1. © 2003 Elsevier Science B.V. All rights reserved.
Document type :
Journal articles
Complete list of metadata

Contributor : Nicolas Renard Connect in order to contact the contributor
Submitted on : Wednesday, April 11, 2018 - 2:59:43 PM
Last modification on : Monday, October 11, 2021 - 2:22:08 PM

Links full text




Franck Thétiot, Smail Triki, J.S. Pala, S. Golhen. Molecular assemblies based on tricyanomethanide units and copper(II) ions. Inorganica Chimica Acta, Elsevier, 2003, 350, pp.314-320. ⟨10.1016/S0020-1693(02)01562-1⟩. ⟨hal-01763910⟩



Record views