Synthesis and Crystal Structure of Ag2（admtrz）2（CF3CO2）2（admtrz=4—amino—3,5—dimethyl—1,2,4—triazole）

1 INTRODUCTION Transition metal complexes bridged by 1, 2, 4-triazole group can produce interesting structures and specific properties[1]. Many attempts have been made to synthesize a variety of complexes with paramagnetic centers by using such ligands, and their structures and magnetic properties have been characterized[2]. However, the polynuclear Ag(I) complexes bridged by 1, 2, 4-triazole have been poorly studied[3]. Recently, we have prepared a series of silver(I) triazole complex…     

Synthesis and Re—refinement of Cu3PSe4

1 INTRODUCTION The chemistry of mixed 15/16 main group compounds has attracted great attentions over the last years[1]. The metal chalcogenophosphides synthesized by solid state reactions[2] are the potential candidates for a wide range of applications such as semiconducting properties, two-dimensional magnetic behavior, anisotropy of conductivity and charge density waves. Some of these compounds are of lamellar structure, which are good materials for the investigation of intercalatio…     

含MoFe3S4单元的μ2-OR或μ2-SR桥联双类立方烷簇合物的红外光谱研究

对下列含ＭｏＦｅ３Ｓ４ 单元的μ２－ＯＲ或μ２ －ＳＲ桥联双类立方烷簇合物的红外光谱进行了研究：（Ｅｔ４ Ｎ）３［Ｍｏ２Ｆｅ６ Ｓ８Ｃｌ６ （ＯＭｅ）３ ］（１）,（Ｅｔ４ Ｎ）３ ［Ｍｏ２ Ｆｅ６ Ｓ８ （ＳＰｈ）６ （ＯＭｅ）３ ］（２）,（Ｂｕ４Ｎ）３ ［Ｍｏ２Ｆｅ６Ｓ８ （ＳＰｈ）６ （ＯＭｅ）３ ］（３）,（Ｅｔ４Ｎ）３ ［Ｍｏ２Ｆｅ６Ｓ８ （ＳＢｕｔ）６（ＯＭｅ）３］（４）,（Ｅｔ４Ｎ）３ ［Ｍｏ２Ｆｅ６Ｓ８ （ＳＰｈ）９ ］（５）。通过这系列簇合物特征振动频率和结构参数及与线型Ｍｏ－Ｆｅ－Ｓ簇合物红外光谱的比较,对其νＭ ｏ－μ２Ｏ（Ｒ） ,νＭ ｏ－μ２Ｓ（Ｒ）,νＭ ｏ－Ｓ,νＦｅ－Ｓ,νＦｅ－ＳＲ,νＦｅ－Ｃｌ 进行了归属。对其中两条途径的亲电诱导效应及Δν（即νＭ ｏ－Ｓ－νＦｅ－Ｓ）与Ｆｅ→Ｍｏ 电荷迁移的关系进行了探讨。最后,讨论了桥联双类立方烷与线型Ｍｏ－Ｆｅ－Ｓ簇合物红外光谱的共性和差异。     

四甲基铵Roussin红盐(Me_4N)_2-〔Fe_2S_2(NO)_4〕的分子和晶体结构

四甲基铵Roussin红盐晶体属于单斜晶系,空间群为C_(2h)~5—P2_1/a,晶胞参数为:a=14.804,b=14.086,c=9.382,13=92.2°和Do=1.519g/cm~3,Z=4(Dc=1.508g/cm~3)。在Philips PW1100型四圆衍射仪上用MoKα射线收集了强度数据,共得I_0>2σ(I_0)的独立衍射点2681个。晶体结构用重原子法解出,所有非H原子的坐标和各向异性温度因子经最小二乘对角矩阵修正,最后偏离因子R=O.065。晶胞中4个(Me_4N)_2Fe_2S_2(NO)_4分子分布于两套独立坐标上。阴离子形成双硫桥联的双核Fe络离子。在Fe<>Fe构成的“四元环”菱形平面上,∠S-Fe-S=105.6°,∠Fe-S-Fe=74.4°,Fe—S键长分别为2.247和2.242。此外还有两个NO基与Fe成端基配位且几乎处于与菱形平面垂直的平面上,使Fe原子周围的键大约成四面体分布。Fe—Fe间距为2.714,表明在[Fe_2S_2(NO)_4)~(2-)中的Fe—Fe之间存在着直接的M—M作用。{Fe(NO)_2}体系的Fe—N—O角偏离直线形约15°,彼此相向弯成“亲合”形。阳离子(Me_4N)~+中4个CH_3基绕中心N原子成四面体形配置。