Synthesis,Crystal Structure and Magnetic Properties of a Co(Ⅱ) Complex Containing 2′-(l′-Methyl)benzimidazolyl-substituted Nitronyl Nitroxide  

作　　者：蒋凯 孙小媛 王利亚 王玉芳 

机构地区：[1]College of Chemistry and Environmental Science,Henan Normal University [2]College of Chemistry and Chemical Engineering,Luoyang Normal University

出　　处：《Chinese Journal of Structural Chemistry》2011年第4期519-523,共5页结构化学（英文）

基　　金：supported by the National Natural Science Foundation of China (Nos.20771054 and 21071074);the Henan Tackle Key Problem of Science and Technology(No.0524220001)

摘　　要：A new complex [Co（NIT-1′-MeBzIm）2Cl2]（NIT-1′-MeBzIm = 2-{2′-[（l′-methyl）-benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide） has been prepared and structurally characterized by X-ray diffraction method.The complex crystallizes in the monoclinic system,space group C2/c,Z = 4.Crystal data：C30H38Cl2CoN8O4,Mr = 704.51,a = 17.074（3）,b = 21.350（3）,c = 11.6962（19）,β = 108.879（2）°,V = 4034.3（11）3,Dc = 1.160 g/cm3,μ（MoKα） = 0.597 mm-1,F（000） = 1468,R = 0.0422 and wR = 0.1141 for 2577 observed reflections with I 2σ（I）.X-ray analysis reveals that the Co（Ⅱ） ion is six-coordinated with a distorted octahedral geometry.Temperature dependence of susceptibility measurements shows the existence of antiferromagnetic interactions between the Co（Ⅱ） ion and the radicals（J =-52.88 cm-1）.A new complex [Co（NIT-1′-MeBzIm）2Cl2]（NIT-1′-MeBzIm = 2-{2′-[（l′-methyl）-benzimidazolyl]}-4,4,5,5-tetramethylimidazoline-1-oxyl-3-oxide） has been prepared and structurally characterized by X-ray diffraction method.The complex crystallizes in the monoclinic system,space group C2/c,Z = 4.Crystal data：C30H38Cl2CoN8O4,Mr = 704.51,a = 17.074（3）,b = 21.350（3）,c = 11.6962（19）,β = 108.879（2）°,V = 4034.3（11）3,Dc = 1.160 g/cm3,μ（MoKα） = 0.597 mm-1,F（000） = 1468,R = 0.0422 and wR = 0.1141 for 2577 observed reflections with I 2σ（I）.X-ray analysis reveals that the Co（Ⅱ） ion is six-coordinated with a distorted octahedral geometry.Temperature dependence of susceptibility measurements shows the existence of antiferromagnetic interactions between the Co（Ⅱ） ion and the radicals（J =-52.88 cm-1）.

关 键 词：crystal structure nitronyl nitroxide radical Co（II） complex magnetic properties 

分 类 号：O641.4[理学—物理化学] TQ463.4[理学—化学]