Formation of novel Olefin–Copper(I) coordination compound dependent on conformation of Olefin ligand

Solvothermal treatments of (E)-1,3-diallyl-2-styryl-3 H -benzo[d]imidazol-1-ium bromide olefin ligand 1 and CuX (X═Br, 2 and X═Cl, 3) in the presence of methanol as solvent at 75 °C for 1 week offer organic–inorganic hybrid compound 2 and olefin–copper(I) compound 3. The conformation of olefin cation ligand affects the coordination of allyl group. Two allyl groups existing at different sides of benzoimidazole plane successfully coordinate to copper(I) centers to form olefin–copper(I) coordination compound 3, which shows two-dimensional structure of (4,4) network with [Cu6Cl4Br4]2− cluster nods. The dielectric measurement results show there is no dielectric anomaly observed within the temperature range of 120 K to 300 K for compound 3.