化学学报 ›› 1992, Vol. 50 ›› Issue (12): 1173-1177. 上一篇    下一篇

研究论文

钴原子簇化合物研究Ⅴ.含硫脲桥基三钴硫羰基簇合物的合成和结构

刘树堂;燕红;胡襄;刘启旺   

  1. 内蒙古大学化学系
  • 发布日期:1992-12-15

Studies on cobalt clusters.Ⅴ.syntheses and structures of sulfur-capped trinuclear cobalt carbonyl clusters containing bridged thiourea moiety

LIU SHUTANG;YAN HONG;HU XIANG;LIU QIWANG   

  • Published:1992-12-15

本文通过Co~2(CO)~8与5个取代硫脲R^1NHC(S)NHR^2反应,制得了通式Co~3(CO)~7(μ~3-S)[μ-η^2-R^1NC(S)NHR^2]5个新簇合物.除用碳氢氮元素分析、IR、^1HNMR和MS表征它们的结构外,还用X光衍射法测得R^11=Ph,R^2=CH~2Ph簇合物的单晶结构.该簇合物属三斜晶系,PI空间群.晶胞参数如下:a=0.9116(1),b=1.2289(2),c=1.2518(2)nm,a=115.56(1),β=100.92(2),γ93.29(1)°;z=2,Ⅴ=1226.2×10^-5nm^3;D~c=1.75g.cm^-3;μ=22.099cm^-1,F(000)=646.结构分析表明,该分子中的Co^3S原子构成三角锥分子骨架,所有CO为钴原子的端羰配体,而PhNC(S)NHCH~2Ph以S原子和与苯基相连的N原子分别与两个钴原子配位,形成Co~2NCS五圆环结构.

关键词: 晶体结构测定, X射线衍射分析, 硫脲类, 羰基化合物, 簇状化合物, 钴络合物, 桥环化合物

Through the reaction of Co2(CO)8 with 5 thioureas R1NHC(S)NHR2, Co3(CO)7(m3-S)[m-h2-RNC(S)NHR2] were prepared and characterized by elemental anal., IR, 1H NMR, and mass spectroscopy. The crystal structure of the cluster with R1 = Ph and R2 = CH2Ph was determine by x-ray single crystal diffraction: triclinic, space group P1, a 0.9116(1), b 1.2289(2), c 1.2518(2) nm, a 115.56(1), b 100.94(2), g 93.39(1)? Z = 2, R = 0.033, Rw = 0.046. The mol. contains a tetrahedral cluster framework Co3S; all carbonyls are terminal ligands of 3 Co atoms; and PhNC(S)NHCH2Ph as bridging ligand links up with 2 Co atoms of the framework by S and N atom-a 5-membered ring of Co2NCS was formed.

Key words: CRYSTAL STRUCTURE DETERMINATION, X-RAY DIFFRACTION ANALYSIS, SULFOCARBAMIDES, CARBONYL COMPOUNDS, CLUSTER COMPOUND, COBALT COMPLEX, BRIDGE COMPOUNDS

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