A New One-dimensional Dicyanamide Bridged Zinc(II) Complex Containing Nitronyl Nitroxide Radicals:Synthesis,Crystal Structure and Magnetic Properties

被引：0
作者：
王利亚 [1 ]
程江涛 [1 ,2 ]
蒋凯 [2 ]
王玉芳 [1 ]
机构：
[1] College of Chemistry and Chemical Engineering, Luoyang Normal University
[2] College of Chemistry and Environmental Science, Henan Normal University
来源：
Chinese Journal of Structural Chemistry | 2009年 / 28卷 / 06期
基金：
中国国家自然科学基金;
关键词：
crystal structure; nitronyl nitroxide radical; Zn(II) complex; dicyanamide anion; antiferromagnetic interactions;
D O I：
10.14102/j.cnki.0254-5861.2009.06.003
中图分类号：
O611.3 [性质];
学科分类号：
070301 ; 081704 ;
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’-(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.
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页码：713 / 717
页数：5
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