Au54(Et3P)18Cl12: a structurally related cluster to Au32(Et3P)12Cl8 gives insight into the formation process. Issue 31 (6th July 2020)

• Record Type: Journal Article
• Authors: Kenzler, Sebastian; Schrenk, Claudio; Schnepf, Andreas
• Is Part Of: Dalton transactions. Volume 49:Issue 31(2020)
• Page Start: 10765
• Page End: 10771
• Publication Date: 2020-07-06
• Subjects: Chemistry, Inorganic -- Periodicals; Chemistry, Physical and theoretical -- Periodicals; Chemistry, Inorganic -- Periodicals; 546.05
• DOI: 10.1039/d0dt02262d
• Languages: English
• ISSNs: 1477-9226

Abstract

Abstract : Cluster fusion? A slight change in the synthetic procedure of Au32 (Et3 P)12 Cl8 leads to the metalloid gold cluster Au54 (Et3 P)18 Cl12, giving further insight into the formation mechanism, showing new structural motifs within metalloid gold clusters Abstract : The reaction of Et3 PAuCl with NaBH4 in EtOH leads to the metalloid gold cluster Au32 (Et3 P)12 Cl8 (Au 32 ) or Au54 (Et3 P)18 Cl12 (Au 54 ) depending on the work-up procedure of the reaction mixture. The molecular structure of Au 54 is determined by X-ray diffraction and can be described as a fusion of two Au 32 clusters showing a similar solubility. The metalloid cluster Au 54 can be either described by a shell model or as a combination of tetrahedral Au4 X units (X = Cl, Et3 P); edge and face sharing, whereas tetrahedral Au4 units are a central motif in gold cluster chemistry. This novel Au 54 gold cluster gives another unique insight into the formation or decomposition process of metalloid clusters, indicating that Au 32 and Au 54 form from a single yet unknown cluster source.