metal-organic compounds
A novel two-dimensional coordination polymer, poly[[2-1,3-bis(2-methyl-1H-imidazol-1-yl)propane]di-4-iodido-di-3-iodido-silver(I)], [Ag4I4(C11H16N4)]n, (I), has been synthesized by solvothermal reaction of AgNO3, KI and 1,3-bis(2-methyl-1H-imidazol-1-yl)propane (bmimp). In (I), the two unique AgI cations have AgNI3 and AgI4 four-coordinated tetrahedral geometries. The bmimp ligand has imposed twofold symmetry. The AgI cations and iodide anions form a unique one-dimensional polymeric column motif incorporating [Ag6I6] hexagonal prisms, which are then connected by bmimp ligands to form two-dimensional organic-inorganic layers. The layers are arranged in parallel in an ABAB fashion and are packed into the resultant three-dimensional supramolecular framework by van der Waals interactions.
metal-organic compounds
The cation-templated self-assembly of 1,4-bis(2-methyl-1H-imidazol-1-yl)butane (bmimb) with CuSCN gives rise to a novel two-dimensional network, namely catena-poly[2,2′-dimethyl-1,1′-(butane-1,4-diyl)bis(1H-imidazol-3-ium) [tetra-μ2-thiocyanato-κ4S:S;κ4S:N-dicopper(I)]], {(C12H20N4)[Cu2(NCS)4]}n. The CuI cation is four-coordinated by one N and three S atoms, giving a tetrahedral geometry. One of the two crystallographically independent SCN− anions acts as a μ2-S:S bridge, binding a pair of CuI cations into a centrosymmetric [Cu2(NCS)2] subunit, which is further extended into a two-dimensional 44-sql net by another kind of SCN− anion with an end-to-end μ2-S:N coordination mode. Interestingly, each H2bmimb dication, lying on an inversion centre, threads through one of the windows of the two-dimensional 44-sql net, giving a pseudorotaxane-like structure. The two-dimensional 44-sql networks are packed into the resultant three-dimensional supramolecular framework through bmimb–SCN N—HN hydrogen bonds.