These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: Poly[diaqua(mu-4,4'-bipyridine-kappa2N:N')bis(mu-cyanido-kappa2C:N)bis(cyanido-kappaC)nickel(II)copper(II)]: a metal-organic cyanide-bridged framework.
    Author: Sereda O, Stoeckli-Evans H.
    Journal: Acta Crystallogr C; 2008 Jun; 64(Pt 6):m221-3. PubMed ID: 18535328.
    Abstract:
    The structure of the title compound, [NiCu(CN)4(C10H8N2)(H2O)2]n or [{Cu(H2O)2}(mu-C10H8N2)(mu-CN)2{Ni(CN)2}]n, was shown to be a metal-organic cyanide-bridged framework, composed essentially of -Cu-4,4'-bpy-Cu-4,4'-bpy-Cu- chains (4,4'-bpy is 4,4'-bipyridine) linked by [Ni(CN)4](2-) anions. Both metal atoms sit on special positions; the Cu(II) atom occupies an inversion center, while the Ni(II) atom of the cyanometallate sits on a twofold axis. The 4,4'-bpy ligand is also situated about a center of symmetry, located at the center of the bridging C-C bond. The scientific impact of this structure lies in the unique manner in which the framework is built up. The arrangement of the -Cu-4,4'-bpy-Cu-4,4'-bpy-Cu- chains, which are mutually perpendicular and non-intersecting, creates large channels running parallel to the c axis. Within these channels, the [Ni(CN)4](2-) anions coordinate to successive Cu(II) atoms, forming zigzag -Cu-N[triple-bond]C-Ni-C[triple-bond]N-Cu- chains. In this manner, a three-dimensional framework structure is constructed. To the authors' knowledge, this arrangement has not been observed in any of the many copper(II)-4,4'-bipyridine framework complexes synthesized to date. The coordination environment of the Cu(II) atom is completed by two water molecules. The framework is further strengthened by O-H...N hydrogen bonds involving the water molecules and the symmetry-equivalent nonbridging cyanide N atoms.
    [Abstract] [Full Text] [Related] [New Search]