Synthesis and Crystal Structure of Dicopper(II) Compound Containing Oxalate and Reduced Imino Nitroxide Radicals  

作　　者：LILi-Cun DONGChao-Ling LIAODai-Zheng JIANGZong-Hui YANShi-Ping 

机构地区：[1]DepartmentofChemistry,NankaiUniversity,Tianjin300071,China

出　　处：《Chinese Journal of Structural Chemistry》2004年第3期296-299,共4页结构化学（英文）

基　　金：This work was supported by the National Natural Science Foundation of China (No. 20271029)

摘　　要：A new dicopper(II) compound with oxalate and reduced imino nitroxide radicals [Cu2(m-C2O4)(Him2-py)2(H2O)2](NO3)2 (Him2-py=1-hydroxy-2-(2-pyridyl)-4,4,5,5-tetramethyli- midazoline) has been synthesized and its crystal structure was determined by X-ray diffraction method. The complex crystallizes in monoclinic, space group P21/n with a = 9.913(4), b = 19.057(8), c = 10.169(4) ? b = 114.292(7), V = 1751(1) 3, C26H38Cu2N8O14, Mr = 813.72, Dc = 1.543 g/cm3, m(MoKa) = 1.290 mm-1, F(000) = 840, Z = 2, the final R = 0.0398 and wR = 0.0986 for 1878 observed reflections (I>2s(I)). The imino nitroxide 2-(2-pyridyl)-4,4,5,5-tetramethyl- imidazoline-1-oxyl (im2-py) is reduced in the reaction to yield Him2-py which consists of oxalato-bridged centrosymmetric [Cu2(m-C2O4)(Him2-py)2(H2O)2]2+ ions and noncoordinated NO3- anions. Each copper(II) ion is in a distorted tetragonal pyramid environment: two nitrogen atoms from Him2-py and two oxygen atoms from the oxalate group are in the basal plane, and one water molecule at the axial position.

关 键 词：crystal structure reduced nitroxide radical dicopper compound oxalate bridge 

分 类 号：O614.121[理学—无机化学]