A two-dimensional silver-iodide organic network constructed from a unique [Ag₆I₆] hexa­gonal prism-based one-dimensional column motif

A novel two-dimensional coordination polymer, poly[[[mu]₂-1,3-bis­(2-methyl-1H-imidazol-1-yl)propane]di-[mu]₄-iodido-di-[mu]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 Ag^I cations have AgNI₃ and AgI₄ four-coordinated tetra­hedral geometries. The bmimp ligand has imposed twofold symmetry. The Ag^I 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.

A novel two-dimensional CuSCN network templated by 2,2′-dimethyl-1,1′-(butane-1,4-di­yl)bis­(1H-imidazol-3-ium) cations

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 Cu^I 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 Cu^I 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—H...N hydrogen bonds.

A one-dimensional cadmium metal–organic chain based on a [Cd₄(COO)₄] secondary building unit and a flexible di­carb­oxy­lic acid ligand

The structural evidence for the formation of a cluster-based chain-like polymeric structure incorporating both syn and anti conformers of a flexible dicarboxylate ligand is reported.