Guo Ming-Lin, Gao Wen-Jun, Luo Cong-Cong, Liu Long
School of Environment and Chemical Engineering and, Key Laboratory of Hollow Fiber Membrane Materials & Membrane Processes, Tianjin Polytechnic University, Tianjin 300160, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2010 Dec 4;67(Pt 1):m23-4. doi: 10.1107/S1600536810049780.
In the title complex, BaCd(C(3)H(2)O(4))(2)(H(2)O)(4), the Ba(II) atoms, located on crystallographic twofold axes, adopt slightly distorted square-anti-prismatic coordination geometries, while the Cd(II) atoms, which lie on crystallographic centres of symmetry, have a distorted octa-hedral coordination. Each malonate dianion binds two different Cd(II) atoms and two different Ba(II) atoms. This connectivity generates alternating layers along [100] in the structure, with one type containing Cd(II) cations and malonate dianions, while the other is primarily composed of Ba(II) ions and coordinated water mol-ecules. The water mol-ecules also participate in extensive O-H⋯O hydrogen bonding.
在标题配合物[BaCd(C₃H₂O₄)₂(H₂O)₄]ₙ中，位于晶体学二重轴上的Ba(II)原子采用稍有扭曲的四方反棱柱配位几何构型，而位于晶体学对称中心的Cd(II)原子具有扭曲的八面体配位。每个丙二酸二价阴离子与两个不同的Cd(II)原子和两个不同的Ba(II)原子结合。这种连接性在结构中沿[100]方向产生交替的层，一种类型包含Cd(II)阳离子和丙二酸二价阴离子，而另一种主要由Ba(II)离子和配位水分子组成。水分子也参与广泛的O-H⋯O氢键作用。
