| A New One-dimensional Dicyanamide Bridged Zinc(Ⅱ) Complex Containing Nitronyl Nitroxide Radicals: Synthesis,Crystal Structure and Magnetic Properties |
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| 作者单位： | WANG Li-Ya,WANG Yu-Fang(College of Chemistry and Chemical Engineering,Luoyang Normal University, Luoyang 471022, China);CHENG Jiang-Tao(College of Chemistry and Chemical Engineering,Luoyang Normal University, Luoyang 471022, China;College of Chemistry and Environmental Science,Henan Normal University, Xinxiang 453002, China);JIANG Kai(College of Chemistry and Environmental Science,Henan Normal University, Xinxiang 453002, China) |
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| 基金项目： | 国家自然科学基金，the Henan Tackle Key Problem of Science and Technology |
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| 摘 要： | ![]()
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'-[(1'-me-thyl)benzimidazolyl]}-4,4,5,5-tetramethylimidazoine-1-oxyl-3-oxide, dca = dicyanamide anion) has been prepared and structurally characterized by single-crystal X-ray diffraction. The complex crystallizes in trielinic, space group P1, with a = 7,428(3), b = 9.839(3), c = 16.708(6) A, а = 93.270(4), β= 101.642(4),γ= 100.632(4)°, C17.5H21N8O5.5Zn, Mr = 496.79, V= 1169.7(7) A3, Dc = 1.411 g/cm3,μ(MoKa) = 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 oetahedral geometry. These units develop as 1D species where dieyanamide ligands bridge zine(Ⅱ) ions. In addition, molecules are linked by π-π piling interactions to form 1-D double-chains. Magnetic investigation indicates that the weak intramoleeular interactions are antiferromagnetic with J = -0.27 cm-1, where the spin Hamitonian is defined as H = -2 ∑ijJijSiS within the complex.
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| 关 键 词： | Zn(Ⅱ) complex |
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