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簇外环化镍十硼烷簇合物的合成与结构研究
Synthesis and Crystal Structures of exo-Polyhedral Cyclized Nickelaundecaborane Clusters
【摘要】 研究了[NiCl2(PPy3)2],B10H102-与硫代苯甲酸的反应,得到四个簇合物,其中三个簇合物[(PPy3)(PhCOS)2Ni·B10H10]·0.5C6H14(1),[(PhCOS)2NiB10H8(PPh3)](2),[(PhCOS)3NiB10H7(PPh3)](3).通过单晶X射线衍射进行了结构研究.三个簇合物均为十一顶巢式构型,并分别存在两个、两个、三个簇外环化的五元环,具有三个环的簇合物至今未见其它文献报道.结构分析表明:簇外环化可以增强Ni—B之间的成键作用.
【Abstract】 Four nickelaundecaborane clusters have been isolated from the reaction of [ NiCl2 (PPh3 )2 ] with B10H102- in the present of PhCOSH. Three of them [(PPh3)(PhCOS)2NiB10H10]·0.5C6H14 (1), [(PhCOS)2NiB10H8(PPh3 )] (2) , [(PhCOS)3NiB10H7 (PPh3 )] (3)were characterized by X - ray diffraction analysis. The clusters have nido 11 - vertex { NiB10} polyhedral skeletons with two, two and three exo -polyhedral cyclic Ni-S-C-O-B five-membered rings, respectively. The distance between boron atoms participating in exo - polyhedral cyclizations to nickel atom is shorter which shows that cyclization can strengthen the nickel - to - boron bonding.
【Key words】 exo - polyhedral cyclization; nickelaundecaborane; clusters; crystal structures;
- 【文献出处】 化学学报 ,Acta Chimica Sinica , 编辑部邮箱 ,2000年07期
- 【分类号】O641
- 【被引频次】4
- 【下载频次】61