Synthesis, Crystal Structure, and N2-Adsorption Property of a Chain Complex of Rhodium(II) Benzoate and Piperazine

摘要

The title compound, an adduct of rhodium(II) benzoate [Rh₂(bz)₄] with piperazine (pip), catena(tetrakis(μ-benzoato-O,O′)(μ-piperazine-N,N′)dirhodium(II)-acetonitrile (1/2)) [Rh₂(bz)₄(pip)]_n·2nCH₃CN, was isolated, and the crystal structure was determined by the single-crystal X-ray diffraction method at 90 K. It crystallizes in the triclinic space group P1 with a = 10.812(2)Å, b = 11.393(3)Å, c = 15.331(3)Å, α = 71.014(5)°, β = 87.063(5)°, γ = 76.451(5)°, V = 1734.4(8)Å3, D_x = 1.644 g/cm3, and Z = 2. The R1 [I 2σ(I)] and wR2 (all data) values are 0.0558 and 0.1367, respectively, for all 6986 independent reflections. The crystal contains zigzag chain molecules with an alternating arrangement of Rh₂(bz)₄ [Rh-Rh 2.4010(10), 2.4066(10)Å] and piperadine, and acetonitrile molecules. The adsorption property was confirmed for N₂ with a specific surface area of 52.7 m2/g.