四核铜原子簇化合物Cu_4(c-C_6H_(11)CSS_2)_4的合成和结构研究

SYNTHESIS AND CRYSTAL STRUCTURE OF TETRANUCLEAR COPPER CLUSTER COMPLEX Cu_4(c-C_6H_(11)CSS_2)_4

环己基甲荒酸六氢吡啶盐与氯化铜反应,产物经二硫化碳重结晶,得四核铜原子簇化合物Cu_4(c-C_6H_(11)CSS_2)_4,用X射线单晶衍射法测定了它的晶体结构,其空间群为C_(4h)~4-P4_2/n晶胞参数a=b=15.125(5)(?),c=8.514(2)(?),α=β=γ=90°,V=1948(1)(?)~3,Z=2,929个衍射点参与修正,R=0.040.分子中Cu_4呈变形四面体构型。产物形成时,c-C_6H_(11)CSS^-与Cu^(2+)有氧化-还原反应发生。文章对产物形成的机理作了探讨。

The product of reaction between hexahydropyridium cyclohexyldithioformate and CuCl2 was rccrystallizcd from CS2 to give Cu4(c-C10H7CSS2)4. Its structure was determined by a singlecrystal diffraction analysis. The crystal belongs to space group C44h-P42/n with a = b=15.125A, c=8.514A, α = β = γ = 90° P=1948A3, Z = 2. R = 0.040 for 929 reflections. In the molecule the Cu4 core has a distored tetrahedron configuration. A redox reaction is involved in the reaction between c-C6H11CS2 and Cu2+. Some mechanisms in the formation of Cu4(c-C6H11CSS2)4 are discussed.