论文部分内容阅读
A new one-dimensional dicyanamide bridged zinc(II) complex containing nitronyl nitroxide radicals Zn(NO3)(NIT-1’-MeBzIm)(dca)n·(H2O)n(NIT-1’-MeBzIm = 2-{2’-(l’-me-thyl)benzimidazolyl}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, dca = dicyanamide anion) has been prepared and structurally characterized by single-crystal X-ray diffraction.The complex crystallizes in triclinic, space group P1, with a = 7.428(3), b = 9.839(3), c = 16.708(6), α = 93.270(4), β = 101.642(4), γ = 100.632(4)°, C17.5H21N8O5.5Zn, Mr = 496.79, V = 1169.7(7) 3, Dc = 1.411 g/cm3, μ(MoKα) = 1.096 mm-1, Z = 2, F(000) = 512, R = 0.0583 and wR = 0.1663 for 4295 observed reflections with I > 2σ(I).X-ray analysis reveals that the zinc(II) ion is six-coordinated with a distorted octahedral geometry.These units develop as 1D species where dicyanamide ligands bridge zinc(II) ions.In addition, molecules are linked by π-π piling interactions to form 1-D double-chains.Magnetic investigation indicates that the weak intramolecular interactions are antiferromagnetic with J =-0.27 cm?1, where the spin Hamitonian is defined as H =-2∑i,jJi,jSiS within the complex.
A new one-dimensional dicyanamide bridged zinc (II) complex containing nitronyl nitroxide radicals Zn (NO3) (NIT- 1’-MeBzIm) (dca) n · (H2O) n (NIT- 1’-MeBzIm = 2- {2 ’ - (l’-me-thyl) benzimidazolyl} -4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide, dca = dicyanamide anion has been prepared and structurally characterized by single-crystal X-ray diffraction. The complex crystallizes in triclinic space group P1 with a = 7.428 (3), b = 9.839 (3), c = 16.708 (6) , α = 93.270 (4) (4) ° C17.5H21N8O5.5Zn Mr = 496.79 V = 1169.7 (7) 3 Dc = 1.411 g / cm3 MoKα = 1.096 mm-1 Z = 2 F000 = 512, R = 0.0583 and wR = 0.1663 for 4295 observed reflections with I> 2σ (I). X-ray analysis reveals that the zinc (II) ion is six- coordinated with a distorted octahedral geometry. dicyanamide ligands bridge zinc (II) ions. In addition, molecules are linked by π-π piling interactions to form 1-D double-chains. weak intramolecular interactions are antiferromagnetic with J = -0.27 cm -1, where the spin Hamitonian is defined as H = -2Σi, jJi, jSiS within the complex.