Xing Y H, Zhang X J, Sun Z, Han J, Zhang Y H, Zhang B L, Ge M F, Niu S Y
College of Chemistry and Chemical Engineering, Liaoning Normal University, Dalian, China.
Spectrochim Acta A Mol Biomol Spectrosc. 2007 Dec 31;68(5):1256-62. doi: 10.1016/j.saa.2007.02.001. Epub 2007 Feb 13.
A series of Cu(II) complexes Cu(2)micro-pzHB(pz)(3) (1), CuH(2)B(pz)(2) (2), CuHB(pz)(3) (3), CuHB(pz(Me2))(3) (4), CuB(pz)(4) (5) (pz=pyrazole), have been synthesized and characterized by elemental analysis, IR, UV-vis, X-ray diffraction, thermal analysis and theoretical analysis. The IR spectra give the Cu-N vibration modes at 322, 366, 344, 387, and 380 cm(-1) in complexes 1-5, respectively. The UV spectra show all the complexes have same UV absorption at 232 nm; there is another band at 332 nm for complexes 1, 2 and 4, while for complexes 3 and 5, the bands are at 272 and 308 nm, respectively. Complex 1 has a binuclear structure in which two pyrazole ligands bridge two Cu-Tp units. In 2-5, the Cu(II) centers are coordinated with dihydrobis(pyrazolyl)borate (Bp), hydrotris(pyrazolyl)borate (Tp), hydrotris(3,5-Me2pyrazolyl)borate (Tp'), tetrakis(pyrazolyl)borate (Tkp) respectively to form a mononuclear structure. The results of thermal analysis for complexes 1-5 are discussed too.
合成了一系列铜（II）配合物Cu(2)μ-pzHB(pz)(3) （1）、CuH(2)B(pz)(2) （2）、CuHB(pz)(3) （3）、CuHB(pz(Me2))(3) （4）、CuB(pz)(4) （5）（pz = 吡唑），并通过元素分析、红外光谱、紫外可见光谱、X射线衍射、热分析和理论分析对其进行了表征。红外光谱分别在配合物1 - 5中给出了位于322、366、344、387和380 cm(-1)处的Cu - N振动模式。紫外光谱表明所有配合物在232 nm处具有相同的紫外吸收；配合物1、2和4在332 nm处还有另一个吸收带，而配合物3和5的吸收带分别位于272和308 nm处。配合物1具有双核结构，其中两个吡唑配体桥连两个Cu - Tp单元。在2 - 5中，Cu（II）中心分别与二氢双（吡唑基）硼酸酯（Bp）、氢三（吡唑基）硼酸酯（Tp）、氢三（3,5 - 二甲基吡唑基）硼酸酯（Tp'）、四（吡唑基）硼酸酯（Tkp）配位形成单核结构。还讨论了配合物1 - 5的热分析结果。
