Sun Qiaozhen, Liao Songyi, Yao Junjun, Wang Junke, Fang Qiongjiali
Department of Materials Chemistry, School of Materials Science and Engineering, Key Laboratory of Nonferrous Metal of Ministry of Education, Central South University, Changsha 410083, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2012 Sep 1;68(Pt 9):m1160-1. doi: 10.1107/S1600536812034447. Epub 2012 Aug 8.
The title compound, (C(5)H(7)N(2))(2)[CdI(4)]·H(2)O, contains one CdI(4) anion, two prontonated 4-amino-pyridine mol-ecules and one water mol-ecule in the asymmetric unit. In the anion, the Cd(II) atom is coordinated by four I atoms in a slightly distorted tetra-hedral geometry. The CdI(4) anion and the water mol-ecule are bis-ected by a crystallographic mirror plane perpendicular to the c-axis direction, with the Cd(II) atom, two of the I atoms and the atoms of the water mol-ecule located on this plane. The crystal packing is stabilized by inter-molecular N-H⋯I, N-H⋯O and O-H⋯I hydrogen bonds and by π-π stacking inter-actions [centroid-centroid distance = 3.798 (3) Å) between pyridine rings, which build up a three-dimensional network.
标题化合物（C₅H₇N₂）₂[CdI₄]·H₂O的不对称单元中包含一个[CdI₄]²⁻阴离子、两个质子化的4-氨基吡啶分子和一个水分子。在阴离子中，Cd（II）原子由四个碘原子以略微扭曲的四面体几何构型配位。[CdI₄]²⁻阴离子和水分子被垂直于c轴方向的晶体学镜面平分，Cd（II）原子、两个碘原子和水分子的原子位于该平面上。晶体堆积通过分子间的N-H⋯I、N-H⋯O和O-H⋯I氢键以及吡啶环之间的π-π堆积相互作用（质心-质心距离 = 3.798 (3) Å）得以稳定，这些相互作用构建了一个三维网络。
