Giant Spherical Cluster with I-C sub(140) Fullerene Topology

• Published in: Angewandte Chemie International Edition Vol. 54; no. 45; pp. 13431 - 13435
• Main Authors: Heinl, Sebastian, Peresypkina, Eugenia, Sutter, Jorg, Scheer, Manfred
• Format: Journal Article
• Language: English
• Published: 01.11.2015
• Subjects: Aggregates; Analogies; Clusters; Fullerenes; Ligands; Solid state; Topology
• ISSN: 1433-7851; 1521-3773
• DOI: 10.1002/anie.201505516

We report on an effective cluster expansion of CuBr-linked aggregates by the increase of the steric bulk of the Cp super(R) ligand in the pentatopic molecules [Cp super(R)Fe( eta super(5)-P sub(5))]. Using [Cp super(BIG)Fe( eta super(5)-P sub(5))] (Cp super(BIG)=C sub(5)(4-nBuC sub(6)H sub(4)) sub(5)), the novel multishell aggregate [{Cp super(BIG)Fe( eta super(5:2:1:1:1 :1:1)-P sub(5))} sub(12)(CuBr) sub(92)] is obtained. It shows topological analogy to the theoretically predicted I-C sub(140) fullerene molecule. The spherical cluster was comprehensively characterized by various methods in solution and in the solid state. Change made it possible: The change from Cp* to the sterically highly demanding ligand Cp super(BIG) in the pentaphosphaferrocenes resulted in an effective expansion of the aggregate giant spherical cluster which has a diameter of about 3.5nm. It exhibits structural analogy to the hitherto unknown I-C sub(140) fullerene, a structural motif that has not yet been observed experimentally.