Synthesis and Crystal Structure of a Ternary Complex: [Ni(phen)_2(pmal)]·8H_2O

摘要

A new ternary complex [Ni(phen)(pmal)]·8H_2O (phen = 1,10-phenanthroline, pmal~(2-) = phenethyl malonic acid) has been synthesized by the reaction of nickel acetate, phen and phenethyl malonic acid. Elemental analysis, IR spectra and X-ray single-crystal diffraction were carried out to determine the composition and crystal structure. Crystal data for this complex: triclinic system, space group P1, a = 10.387(5), b = 13.112(6), c = 14.229(6) A, α = 76.176(7), β = 83.778(8), γ = 71.770(6)°, C_(35)H_(42)N_4O_(12)Ni, M_r = 769.44, Z = 2, F(000) = 808, V = 1786.1 A~3, D_c = 1.431 g/cm~3, μ = 0.612 mm~(-1), the final R = 0.0653 and wR = 0.1033 for 9379 (R_(int) = 0.0244) independent reflections and 4730 observed reflections (I > 2σ(I)). Structural analysis shows that the coordination geometry of Ni(Ⅱ) is a distorted octahedron. A novel two-dimensional structure is constructed from (H_2O)_4 and (H_2O)_(12) water clusters, and the complex forms a 3-D network supramolecular structure by hydrogen bonds and π-π stacking of neighboring phens.