Structural Characterization of Lithium and Sodium Bulky Bis(silyl)amide Complexes
作者:Hannah Nicholas、Conrad Goodwin、Jon Kragskow、Selena Lockyer、David Mills
DOI:10.3390/molecules23051138
日期:——
} and HN(SiiPr3)2} (1) were prepared by literature procedures as colourless oils; on one occasion crystals of 1 were obtained. These were treated separately with nBuLi to afford the respective lithium bis(silyl)amides [Liμ-N(SitBuMe2)(SiMe3)}]2 (2), [Liμ-N(SiiPr3)(SiMe3)}]2 (3), [LiN(SitBuMe2)2}μ-N(SitBuMe2)2}Li(THF)] (4), [LiN(SiiPr3)(SitBuMe2)}(DME)] (6) and [LiN(SiiPr3)2}(THF)] (7) following
碱金属酰胺是合成化学中的重要试剂,双(甲硅烷基)酰胺 N(SiMe3)2} (N'') 是应用最广泛的例子之一。鉴于 N'' 提供了具有里程碑意义的配合物,我们研究了空间体积增加的双(甲硅烷基)酰胺锂和钠的合成路线,以分析 R 基团取代对结构特征的影响。为了进行这项研究,庞大的双(甲硅烷基)胺 HN(SitBuMe2)(SiMe3)}、HN(SiiPr3)(SiMe3)}、HN(SitBuMe2)2}、HN(SiiPr3)(SitBuMe2)} 和HN(SiiPr3)2} (1) 通过文献方法制备为无色油;有一次获得了 1 个晶体。这些分别用 nBuLi 处理,得到各自的双(甲硅烷基)酰胺锂 [Liμ-N(SitBuMe2)(SiMe3)}]2 (2), [Liμ-N(SiiPr3)(SiMe3)}]2 (3), [LiN(SitBuMe2)2}μ-N(SitBuMe2)2}Li(THF)]