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化学学报
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化学学报 ›› 1999, Vol. 57 ›› Issue (8): 846-851. 上一篇    下一篇

研究论文

二核Fe/S化合物(Et4N)2[Fe2S2Br4]的合成与结构

邓玉恒;温庭斌;朱红平;陈昌能;刘秋田   

  1. 中国科学院福建物质结构研究所.福州(350002);中国科学院结构化学国家重点 实验室.福州(350002)
  • 发布日期:1999-08-15

Crystal Srtucture of tetraethylammonium di-μ2-sulfido-bis [dibromoiron(Ⅲ)]

Deng Yuheng;Wen Tingbin;Zhu Hongping;Chen Changneng;Liu Qiutian   

  1. Fujian Inst Res Struct Matter, Acad Sinica.Fuzhou(350002);.Fuzhou (350002)
  • Published:1999-08-15

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标题化合物(Et4N)2[Fe2s2Br4](1)在VS/FeBr2/imnt2/Et4NCl反应体系中获得,它属于单斜晶系,空间群P21/n,主要晶胞参数为:α＝0.91193(2)nm,b=1.0837(3)nm,c=1.54360(1)nm,β=105.090(1),ν=1.4177(5)nm3,z=2,ρ=1.778g/cm3,μ＝6.841cm1,F(000)=748,结构精修结果为:R1=0.0287,wR=0.0640。簇阴离子[Fe2S2Br4]2含有一个菱形Fe2S2单元,铁的配位几何构型明显偏离了理想的Td对称性，导致整个阴离子的对称性降低为D2h.同时观察到它的Fe--Br键呈现反常加长倾向。

关键词: 铁络合物, 硫化物, 晶体结构, 溴化合物, 季胺, 铁硫蛋白

The title complex (Et4N)2[Fe2S2Br4]was obtained from a reation system of VS/FBr2/imnt2/Et4NCl.It crystallizes in the monoclinic space group P21/n,with a＝0.91193(2),b=1.03874 c=1.54360(1)nm,β＝105. 090(1),ν=1.4177(5)nm3,ｚ＝2,Dc=1.778g/cm3, F(000)=748,R1=0.0287 and wR2=0.0640 for 1617 reflections with I>2.0σ(I).The cluster anion [Fe2S2Br4]2 contains a rhombic Fe2S2 unit in which the geomrty of the Fe sites deviates obviously from the idealized Td symmetry leading to a D2h symmetry for the cluster anion. Meanwhile,an irregular variation was observed for Fe--Br bond distances in the complex.

Key words: IRON COMPLEX, SULFIDE, CRYSTAL STRUCTURE, BROMINE COMPOUNDS, QUATERNARY AMMONIUM COMPOUNDS

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