检索结果-南通市图书馆

Synthesis, Crystal Structure and Magnetic Properties of Cobalt(II) Complex Involving imino nitroxide radicals

在线全文

学校读者我要写书评

暂无评论

引用

Chinese Journal of Structural Chemistry 2005年第3期24卷 283-286页

作者：王利亚王玉芳马录芳蒋凯 DepartmentofChemistry LuoyangTeacher＇sCollegeLuoyang471022China CollegeofChemistryandEnvironmentalScience HenanNormalUniversityXinxiang453002China

A novel compound [Co(IM2-Py)2(NO3)]?(NO3) (IM2-Py = 2-(2?-pyridyl)-4,4,5,5- tetramethylimidazoline-1-oxyl) has been prepared and structurally characterized by X-ray diffrac- tion method. It crystallizes in orthorhombic, space group P212121 with a = 11.031(2), b = 13.492(3), c = 20.467(4) ?, V = 3046.0(11) ?3, C24H32CoN8O8, Mr = 619.51, Z = 4, Dc = 1.351 g/cm3, μ(MoKα) = 0.620 mm?1, F(000) = 1292, R = 0.0506 and wR = 0.0845 for 3752 observed reflections with I > 2σ(I). X-ray analysis reveals that the crystal structure consists of [Co(IM2- Py)2(NO3)]+ moiety and a NO3 anion. The cobalt(II) ion is six-coordinated with a distorted octahedral geometry. Tempera- ? ture dependence of susceptibility measurements show that there exist an antiferromagnetic inter- action in the compound.

关键词： crystal structure imino nitroxide radical Co(II) complex magnetic properties

Exchange Interaction of a Novel Heterospin Polynuclear Complex Containing Transition Metals and imino nitroxide radicals: {[(CuL)Ni(IM-2Py)_2](ClO_4)_2}_2·2H_2O

在线全文

学校读者我要写书评

暂无评论

引用

Chinese Journal of Chemistry 2003年第2期21卷 133-138页

作者：刘志亮李立存廖代正姜宗慧阎世平 Department of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Nankai University Tianjin 300071 China State Key Laboratory of Coordination Chemistry Nanjing University Nanjing Jiangsu 210093 China

A novel heterospin complex {[(CuL)Ni(IM 2Py) 2](ClO 4) 2} 2·2H 2O (L=2,3 dioxo 5,6:14,15 dibenzo 1,4,8,12 tetraazacyclo pentadeca 7,12 diene, IM 2Py=2 (2′ pyridyl) 4,4,5,5 tetra^methyl 4,5 dihydro 1 H imidazoline 1 oxyl) has been synthesized and its crystal structure was determined by X ray diffraction analysis. In order to interpret the exchange interaction of this asymmetric heterospin system, a theoretical model has been established. Using this theoretical model the magnetic susceptibility data have been fitted and lead to coupling constant values equal to 1 4 cm -1 (Ni Rad) and -38 0 cm -1 (Ni Cu), respectively.

关键词： crystal structure imino nitroxide radical heterospin complex exchange interaction

Synthesis and Crystal Structure of an imino nitroxide Complex [Cd(IM2py)_2Cl_2]

在线全文

学校读者我要写书评

暂无评论

引用

Chinese Journal of Structural Chemistry 2004年第11期23卷 1218-1221页

作者：王淑萍刘翠格高东昭廖代正姜宗慧闫世平 Department of Chemistry Nankai University Tianjin 300071 China Department of Chemistry Hebei Normal University Shijiazhuang 050091 China Department of Chemistry Nankai University Tianjin 300071 ChinaState Key Laboratory of Coordination Chemistry Nanjing 210093 China

The title compound [Cd(IM2py)2Cl2], where IM2py = 2-(2?-pyridinyl)-4,4,5,5-tetra- methylimidazoline-1-oxyl, has been prepared and structurally characterized by X-ray diffraction. It crystallizes in monoclinic, space group C2/c with a = 18.436(6), b = 9.255(3), c = 15.831(5) ? b = 100.274(5)? C24H32CdCl2N6O2, Mr = 619.86, V = 2658.0(14) ?, Z = 4, Dc = 1.549 g/cm3, m(MoKa) = 1.056 mm-1, F(000) = 1264, the final R = 0.0324 and wR = 0.0659 for 2725 independent reflections with Rint = 0.0378. The title complex exists as discrete mononuclear molecules, adopting a distorted octahedral [cis(Cl)-trans(py)] configuration with the cadmium(II) ion being bonded to two bidentate radicals and two chlorine atoms. There exist p???p stacking interactions between the adjacent parallel pyridyl rings of the complex in the ac plane.

关键词： crystal structure imino nitroxide radical cadmium(II) complex