Yang Juan, Li Jiantong, Wang Qiufen
Department of Physical Chemistry, Henan Polytechnic University, Jiaozuo, 454003, People's Republic of China.
Acta Crystallogr Sect E Struct Rep Online. 2010 Jan 20;66(Pt 2):m183-4. doi: 10.1107/S160053681000190X.
The reaction of lanthanum nitrate and 4-ethyl-benzoic acid (EBAH) in aqueous solution yielded the title polymer, La(C(9)H(9)O(2))(3)(C(9)H(10)O(2))(H(2)O). The asymmetric unit contains one La(III) atom, three 4-ethyl-benzoate (EBA) ligands, one neutral EBAH ligand and one coordinated water mol-ecule. Each La(III) ion is eight-coordinated by six O atoms from six bridging-bidentate EBA ligands, one O atom from a monodentate EBAH ligand and one water O atom in a distorted bicapped trigonal-prismatic geometry. The adjacent La(III) ions are linked by the carboxyl-ate groups of EBA ligands in a bridging-bidetate coordination mode, resulting in an infinite chain structure along the c axis. O-H⋯O hydrogen-bonding inter-actions involving the water mol-ecules, carboxyl-ate groups and carboxyl H atoms are formed within the one-dimensional polymer. One of the ethyl groups is disordered over two positions with occupancies of 0.717 (7) and 0.283 (7).
硝酸镧与4-乙基苯甲酸（EBAH）在水溶液中反应生成了标题聚合物[La(C₉H₉O₂)₃(C₉H₁₀O₂)(H₂O)]ₙ。不对称单元包含一个La(III)原子、三个4-乙基苯甲酸酯（EBA）配体、一个中性EBAH配体和一个配位水分子。每个La(III)离子由六个桥联双齿EBA配体的六个O原子、一个单齿EBAH配体的一个O原子和一个水分子O原子以扭曲的双帽三角棱柱几何构型八配位。相邻的La(III)离子通过EBA配体的羧酸根基团以桥联双齿配位模式相连，沿c轴形成无限链结构。在一维聚合物中形成了涉及水分子、羧酸根基团和羧基H原子的O-H⋯O氢键相互作用。其中一个乙基在两个位置上无序，占有率分别为0.717 (7)和0.283 (7)。
