Metal clusters as models of intermediates in organic syntheses. Reactions of the terminal dialkynes NR(CMe<sub>2</sub>CCH)<sub>2</sub>(R = H or Me) with [Ru<sub>3</sub>(CO)<sub>12</sub>]
作者:Ermete Boroni、Mirco Costa、Giovanni Predieri、Enrico Sappa、Antonio Tiripicchio
DOI:10.1039/dt9920002585
日期:——
The compound NMe(CMe2CCH)21 reacts with [Ru3(CO)12] giving a trinuclear cluster and a dinuclear ruthenacyclopentadiene derivative. Under the same conditions, NH(CMe2CCH)22 gives only the dinuclear ruthenacyclopentadiene derivative. The crystal structure of the trinuclear cluster [Ru3(CO)8(HC[graphic omitted]CHCCCMe2)] has been determined by X-ray diffraction: triclinic, space group P, with a= 15.607(8)
化合物NMe(CMe 2 C CH)2 1与[Ru 3(CO)12 ]反应,得到三核簇和二核钌环戊二烯衍生物。在相同条件下,NH(CMe 2 C CH)2 2仅给出双核钌烷基环戊二烯衍生物。三核团簇[Ru 3(CO)8(HC [图中省略] CHCCCMe 2)]的晶体结构已通过X射线衍射测定:三斜晶系,空间群P,a = 15.607(8),b = 15.912 (7),c= 11.674(5)Å,α= 104.88(2),β= 90.01(3),γ= 103.53(2)°,Z= 4。晶体中存在两个独立但实际上相同的分子。在该结构中,通过一个配体1分子的部分环化并与CC CMe 2片段偶联形成的六碳原子链与所有三个钌原子相互作用。该团簇代表了一种罕见的衍生物实例,其特征在于与三个金属配位的六碳原子链。讨论了这种相互作用及其在有机产物合成中的作用。