Al₅₀C₁₂₀H₁₈₀: Eine Pseudofullerenhülle aus 60 Kohlenstoffatomen und 60 Methylgruppen schützt einen Clusterkern aus 50 Aluminiumatomen

Abstract

Die kontrollierte Disproportionierung von metastabilen AlIHalogenid-Lösungen hat sich in den letzten Jahren zu einer erfolgreichen Strategie für die Herstellung von metalloiden Al-Clusterverbindungen als Zwischenstufen auf dem Weg zu Aluminiummetall-Volumenphasen entwickelt [Gl. (1), X = Cl, Br, I]. [1] 3 AlX ! 2 Al metal þ AlX 3 ð1ÞUm die thermodynamisch bevorzugte Metallbildung zu verhindern, werden die Halogenidliganden -parallel zur Disproportionierungsreaktion -durch sperrige Liganden substituiert. Die Mehrzahl der metalloiden Al-Cluster, die in unserer Arbeitsgruppe hergestellt wurden, ist durch N(SiMe 3 ) 2 -Liganden geschützt.[1] Hier stellen wir einen großen metalloiden Al-Cluster vor, der ausschließlich aus Al-, C-und H-Atomen aufgebaut ist.

[Eu@Sn6Bi8]4−: A Mini‐Fullerane‐Type Zintl Anion Containing a Lanthanide Ion

“…[25] A discrete cluster with a fully inorganic fullerene-like structural motif was realized with the 90-atom core in [{Cp*Fe( [26] The onion-type cluster anion [As@Ni 12 @As 20 ] 3À [27] comprises an As 20 fullerane-type dodecahedron, which represents a Group 15 analogue of the smallest known fullerene C 20 . [28] Among the large number of metalloid aluminum and gallium clusters with metal-metal bonds, [29] [Al 50 (Cp* 12 )] [30] possesses a pseudo fullerene carbon shell protecting an Al 50 cluster core. A 14-atom cage that is structurally closely related to the anion in 1 was observed in [Ge 14 {Ge(SiMe 3 ) 3 } 5 Li 3 (thf) 6 ].…”

The Clusters [Ma(ECp*)b] (M=Pd, Pt; E=Al, Ga, In): Structures, Fluxionality, and Ligand Exchange Reactions

“…Will it be possible to derive giant clusters M a E b with a, b @ 1 that exhibit a cluster core of M a stabilized by a shell of surface bound E I R ligands, such as in the case of the classical, giant carbonyl-metallate clusters [ 12 ] points in that direction. [16] Table 1 lists all known homoleptic compounds M a E b (M = d-block metal), including the results of this work, indicating that this chemistry is still limited to the Group 10 metals Ni, Pd, Pt.…”

The Intermetalloid Cluster [(Cp*AlCu)6H4], Embedding a Cu6 Core Inside an Octahedral Al6 Shell: Molecular Models of Hume–Rothery Nanophases

“…This feature is connecting [A a (BR) b ] to Schnçckels famous family of ligand-stabilized metalloid Al n and Ga n clusters, [9] with [Al 50 Cp* 12 ] as the most prominent example. [10] The analogy to the coordination chemistry of Cp*Al and Cp*Ga becomes intriguing when the Al 50 system is written as [Al 38 (AlCp*) 12 ]. Thus, being a versatile and powerful donor ligand, the carbenoid Cp*Al should also be able to stabilize larger transition-metal cores A a (a > 3), which is quite similar to the role of CO in metal carbonyl clusters, and for many years we were working towards this goal.…”