首页> 美国卫生研究院文献>Acta Crystallographica Section E: Crystallographic Communications >Redetermination of the crystal structure of catena-polybis­(ethyl­enedi­amine)­platinum(II)-μ-iodido-bis­(ethyl­enedi­amine)­platinum(IV)-μ-iodido tetra­kis­(octane-1-sulfonate) dihydrate
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Redetermination of the crystal structure of catena-polybis­(ethyl­enedi­amine)­platinum(II)-μ-iodido-bis­(ethyl­enedi­amine)­platinum(IV)-μ-iodido tetra­kis­(octane-1-sulfonate) dihydrate

机译:重新确定四(辛烷-1-磺酸)四-双(乙二胺)铂(II)-μ-碘-双(乙二胺)铂(IV)-μ-碘链烯的晶体结构

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摘要

The structure of the title compound, which represents a mixed-valence platinum(II,IV) complex, {[PtIIPtIVI2(C2H8N2)4][CH3(CH2)7SO3]4·2H2O}n, has been redetermined in a different space group. In contrast to the previously reported determination in the space group P21 cn [Matsushita & Taira (1999). Synth. Met. >102, 1787–1788], the current model was refined in the centrosymmetric space group Pmcn using the original diffraction data. The title compound has a linear chain structure composed of square-planar [Pt(en)2]2+ and elongated octa­hedral trans-[PtI2(en)2]2+ cations (en is ethyl­enedi­amine) stacked alternately, bridged by the I atoms, parallel to the c axis. Inorganic layers aligned parallel to the bc plane, composed of the Pt-complex columns, the –SO3 part of the octane-1-sulfonate anion, and the water mol­ecule of crystallization, are stacked alternately with organic layers composed of the long-chain alkyl groups along the a axis. The Pt and I sites are located on the same mirror plane whereby the I site is equally disordered over two positions. The Pt and I atoms form a slight zigzag ⋯I—PtIV—I⋯PtII⋯ chain, with PtIV—I bond lengths of 2.6888 (17) and 2.7239 (17) Å, PtII⋯I contacts of 3.2065 (17) and 3.1732 (16) Å, and PtIV—I⋯PtII angles of 178.3 (3) and 176.7 (2)°. The mixed-valence state of the Pt site is expressed by the structural parameter δ = (PtIV—I)/(PtII⋯I), with values of 0.839 and 0.858 for the two independent I atoms. In the crystal, N—H⋯O hydrogen bonds involving the cationic chains, the sulfonate groups and water mol­ecules of crystallization, stabilize the columnar structure.
机译:标题化合物的结构,代表混合价的铂(II,IV)络合物,{[Pt II Pt IV I2(C2H8N2)4] [CH3( CH2)7SO3] 4·2H2O} n已在另一个空间组中重新确定。与先前报道的空间群P21 cn [Matsushita&Taira(1999)]中的测定相反。合成器。大都会> 102 ,1787–1788],使用原始衍射数据在中心对称空间群Pmcn中对当前模型进行了改进。标题化合物具有由正方形平面[Pt(en)2] 2 + 和细长的八面体反式-[PtI2(en)2] 2 + 组成的线性链结构阳离子(en是乙二胺)交替堆叠,由I原子桥接,平行于c轴。平行于bc平面排列的无机层,由Pt络合物柱,辛烷-1-磺酸根阴离子的–SO 3 -部分和水分子组成结晶层沿a轴与由长链烷基组成的有机层交替堆叠。 Pt和I位点位于同一镜平面上,因此I位点在两个位置上均无序。 Pt和I原子形成轻微的锯齿形⋯I-Pt IV -I⋯Pt II ⋯链,且Pt IV -I键长2.6888(17)和2.7239(17)Å,Pt II ⋯I触点的3.2065(17)和3.1732(16)Å,以及Pt IV -I⋯Pt II 角分别为178.3(3)和176.7(2)°。 Pt位点的混合价态由结构参数δ=(Pt IV -I)/(Pt II ⋯I)表示,其值为0.839和两个独立的I原子为0.858。在晶体中,涉及阳离子链,磺酸根基团和结晶水分子的N-H = O氢键稳定了柱状结构。

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