摘要
合成了两种配合物晶体[Ni(im )6](NO3)(OH)(H2O)4 (Ⅰ) 和[Ni(im )4(H2O)2][C6H4(COO)2](Ⅱ)(im = C3H4N2). 晶体结构测定表明, 晶体(Ⅰ)属于六方晶系, 空间群P63/m , a=0.898 5(10) nm , c= 2.100 2(4) nm , V= 1.468 5(4) nm 3, Z= 2, R= 0.043, Rw = 0.045. 晶体(Ⅱ)属单斜晶系, 空间群C2/c, a= 2.220 7(4) nm , b= 0.766 5(2) nm , c= 1.604 3(3) nm , β=120.60(3)°, V= 2.350 3(9) nm 3, Z= 4, R= 0.056, Rw = 0.079. 两种配合物在结构上的突出特点是通过氢键形成了三维无限伸展的氢键电荷传递体系, 对分子间电子传递有调节和促进作用,从而对晶体的磁性质产生了一定影响.
The crystals of two complexes [Ni(im) 6](NO 3)(OH)(H 2O) 4(Ⅰ) and [Ni(im) 4(H 2O) 2][C 6H 4(COO) 2] (Ⅱ) were synthesized. The structures of single crystals were determined by X ray diffraction. The crystal (Ⅰ) is of hexagonal system, space group P6 3/m with a =0.898 5(10) nm , c =2.100 2(4) nm , V =1.468 5(4) nm 3, Z =2, R =0.043, R w=0.045.The crystal(Ⅱ) is monoclinic system, space group C2/c with a =2.220 7(4) nm , b =0.766 5(2) nm, c =1.604 3(3) nm, β =120.60(3)°, V =2.350 3(9) nm 3, Z =4, R =0.056, R w=0.079. The prominent feature of these two complexes is that they have various hydrogen bondings and thereby possess infinite three dimensional networks. This not only increa ses the crystal structure stability but also forms hydrogen bonded charged transfer system, which modulates and promotes the electron transfer between the molecules. The temperature dependence of the magnetic susceptibility was measured and discussed.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第11期1671-1676,共6页
Chemical Journal of Chinese Universities
基金
国家自然科学基金
辽宁省自然科学基金
关键词
配合物
氢键网络
晶体结构
磁性
镍
咪唑
Ni(im) complex, Hydrogen bonded network, Crystal structure, Magnetism