Kenzler Sebastian, Schrenk Claudio, Schnepf Andreas
Institute of Inorganic Chemistry, Universität Tübingen, Auf der Morgenstelle 18, D-72076 Tübingen, Germany.
Dalton Trans. 2020 Aug 11;49(31):10765-10771. doi: 10.1039/d0dt02262d.
The reaction of Et3PAuCl with NaBH4 in EtOH leads to the metalloid gold cluster Au32(Et3P)12Cl8 (Au32) or Au54(Et3P)18Cl12 (Au54) depending on the work-up procedure of the reaction mixture. The molecular structure of Au54 is determined by X-ray diffraction and can be described as a fusion of two Au32 clusters showing a similar solubility. The metalloid cluster Au54 can be either described by a shell model or as a combination of tetrahedral Au4X units (X = Cl, Et3P); edge and face sharing, whereas tetrahedral Au4 units are a central motif in gold cluster chemistry. This novel Au54 gold cluster gives another unique insight into the formation or decomposition process of metalloid clusters, indicating that Au32 and Au54 form from a single yet unknown cluster source.
三乙膦合氯化金（Et3PAuCl）与硼氢化钠（NaBH4）在乙醇中反应，根据反应混合物的后处理程序，会生成类金属金簇Au32(Et3P)12Cl8（Au32）或Au54(Et3P)18Cl12（Au54）。Au54的分子结构通过X射线衍射确定，可描述为两个具有相似溶解度的Au32簇的融合体。类金属簇Au54既可以用壳层模型描述，也可以描述为四面体Au4X单元（X = Cl，Et3P）的组合；存在边共享和面共享，而四面体Au4单元是金簇化学中的核心基序。这种新型的Au54金簇为类金属簇的形成或分解过程提供了另一种独特的见解，表明Au32和Au54是由单一但未知的簇源形成的。
