多聚咪唑锌[Zn(Im)_2]_n的合成与晶体结构  

Synthesis and Crystal Structure of [Zn(Im) 2] n

作　　者：黄晓春[1] 李丹[1] 童叶翔[2] 陈小明[2] 

机构地区：[1]汕头大学化学系 [2]中山大学化学与化工学院

出　　处：《中山大学学报（自然科学版）》1998年第6期55-58,共4页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金

摘　　要：［Ｚｎ（Ｉｍ）２］ｎ晶体属四方晶系，空间群Ｉ４１ｃｄ，晶胞参数ａ＝２３５７．２（３）ｐｍ，ｂ＝２３５７．２（３）ｐｍ，ｃ＝１２４６．７（２）ｐｍ，Ｖ＝６．９２７（２）×１０９ｐｍ３，Ｚ＝３２．配合物晶体不对称结构单元中有２个独立Ｚｎ（Ⅱ）原子，它们处于非常相似的配位环境．每个Ｚｎ（Ⅱ）原子与４个脱氢的咪唑氮原子配位形成四面体配位结构．每个脱氢的咪唑配体起到μ２桥的作用，连接１对相邻的Ｚｎ（Ⅱ）原子，其中，Ｚｎ…Ｚｎ间距为５９１．８（１）～６０２．９（１）ｐｍ．固态时，Ｚｎ（Ⅱ）原子与μ２－咪唑桥交替相连成为三维网状结构，并形成沿ｃ轴延伸的洞状结构．Complex [Zn(Im) 2] n crystallizes in tetragonal space group I4 1 cd, with a = 2 357 2(3) pm, b =2 357 2(3) pm, c =12 467(2) pm, V =6 927(2)×10 9 pm 3, Z =32 The asymmetric unit of [Zn(Im) 2] n consists of two crystallographically independent Zn(Ⅱ) atoms, which adopt very similar coordination environments Each Zn(Ⅱ) atom is tetrahedrally coordinated by four imidazolate N atoms from different imidazolate group Each imidazolate ligand in [Zn(Im) 2] n acts as a μ 2 bridge, linking a pair of adjacent Zn(Ⅱ) atoms with the Zn…Zn separation at range of 591 8(1)￣602 9(1) pm The Zn(Ⅱ) atoms and the μ 2 imidazolate moieties in [Zn(Im) 2] n are alternatively connected into a three dimentional network in the solid state, resulting in channels running along the c axis

关 键 词：晶体结构 网状结构 合成 多聚咪唑锌 四方晶系 

分 类 号：O634[理学—高分子化学] O711.4[理学—化学]