Abstract
Rare-earth metals have been mostly entrapped into fullerene cages to form endohedral clusterfullerenes, whereas non-Group-3 transition metals that can form clusterfullerenes are limited to titanium (Ti) and vanadium (V), and both are exclusively entrapped within an Ih -C80 cage. Non-Group-3 transition-metal-containing endohedral fullerenes based on a C80 cage with D5h symmetry, Vx Sc3-x N@D5h -C80 (x=1, 2), have now been synthesized, which exhibit two variable cluster compositions. The molecular structure of VSc2 N@D5h -C80 was unambiguously determined by X-ray crystallography. According to a comparative study with the reported Ti- and V-containing clusterfullerenes based on a Ih -C80 cage and the analogous D5h -C80 -based metal nitride clusterfullerenes containing rare-earth metals only, the decisive role of the non-Group-3 transition metal on the formation of the corresponding D5h -C80 -based clusterfullerenes is unraveled.
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