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On the Reactivity of NHCtBuAuCl towards Rb6Cs6Si17: The First Gold‐Silicon Cluster [(NHCtBuAu)6(η2‐Si4)]Cl2·7NH3 and an Imide Capped Gold Triangle (NHCtBuAu)3NHCl
Zeitschrift für anorganische und allgemeine Chemie ( IF 1.1 ) Pub Date : 2020-09-30 , DOI: 10.1002/zaac.202000275
Susanne M. Tiefenthaler 1 , Verena Streitferdt 2 , Josef Baumann 1 , Stefanie Gaertner 1 , Ruth M. Gschwind 2 , Nikolaus Korber 1
Affiliation  

Crystals of the two new compounds (NHCtBuAu)3NHCl and [(NHCtBuAu)62‐Si4)]Cl2·7NH3 could be isolated from the reaction of Rb6Cs6Si17 with NHCtBuAuCl in the presence of [2.2.2]‐cryptand in liquid ammonia. Both compounds were characterized by single‐crystal X‐ray diffraction and crystallize trigonally without any alkali metals or chelating ligands. Additionally, the crystal of [(NHCtBuAu)62‐Si4)]Cl2·7NH3 was further interpreted by means of ELF and NBO calculations. In the case of (NHCtBuAu)3NHCl, NMR experiments provided an exceptional insight into the reaction processes in solution and allowed for the detection of sequential precursors. In the class of capped gold triangles (NHCtBuAu)3NHCl impresses with its unique characteristics of being capped by an imide and bound to N‐heterocyclic carbenes as ligands instead of the ubiquitously employed phosphines. The gold capped silicon tetrahedron [(NHCtBuAu)62‐Si4)]Cl2·7NH3 represents the first known silicide‐gold compound, as well as the first known functionalized Zintl anion, crystallized with a cationic central moiety.

中文翻译:

NHCtBuAuCl对Rb6Cs6Si17的反应性:第一个金-硅团簇[(NHCtBuAu)6(η2-Si4)] Cl2·7NH3和一个酰亚胺封闭的金三角(NHCtBuAu)3NHCl

两个新的化合物(NHC的晶体Au)的3 NHCl和[(NHCAu)的6(η 2 -Si 4)]氯2 · 7NH 3可从Rb的反应被分离66的Si 17与在[2.2.2]-隐链烷烃在液氨中存在的NHC t Bu AuCl。两种化合物的特征均在于单晶X射线衍射,并且在没有任何碱金属或螯合配体的情况下呈三角形结晶。另外,[(NHC的晶体Au)的6(η 2-Si 4)] Cl 2 · 7NH 3通过ELF和NBO计算得到进一步解释。对于(NHC t Bu Au)3 NHCl,NMR实验提供了对溶液中反应过程的独特见解,并允许检测顺序的前体。在带帽的金三角(NHC t Bu Au)中,3 NHCl的独特特征是被酰亚胺覆盖并与N杂环卡宾(而不是普遍使用的膦)配体结合。镀金硅四面体[(NHC t Bu Au)6(η2 -Si 4)] Cl 2 · 7NH 3代表第一个已知的硅化物-金化合物,以及第一个已知的以阳离子中心部分结晶的功能化Zintl阴离子。
更新日期:2020-09-30
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