A Distorted Tetrahedral Metal Oxide Cluster inside an Icosahedral Carbon Cage. Synthesis, Isolation, and Structural Characterization of Sc₄(μ₃-O)₂@I_h-C₈₀

Abstract

The remarkably large cluster Sc4(mu3-O)2 has been obtained trapped inside an Ih-C80 cage by conducting the vaporization of graphite rods doped with copper(II) nitrate and scandium(III) oxide in an electric arc under a low pressure helium atmosphere with an added flow of air. The product has been isolated by chromatography and identified by high-resolution mass spectrometry. The structure of Sc4(mu3-O)2@Ih-C80 has been determined by X-ray crystallography on a crystal of Sc4(mu3-O)2@Ih-C80.NiII(OEP).2(C6H6). The Sc4(mu3-O)2 unit consists of a distorted tetrahedron of scandium atoms with oxygen atoms bridging two of its faces. The Sc-Sc distances range from 2.946(7) to 3.379(7) A.

Chemical, Electrochemical, and Structural Properties of Endohedral Metallofullerenes

“…[9,113] Figure 4 shows the structure of Sc 4 (m 3 -O) 2 @C 80 (I h ) obtained from crystallographic data. [10] …”

“…The addition of up to 10 malonate groups was detected by mass spectrometry. This ester derivative was then hydrolyzed to the water-soluble carboxylic acid derivative Gd@C 60 (C-(CO 2 H) 2 ) 10 . [66] A couple of years later Diener et al used the same approach to modify the a-emitting radionuclides 212 Pb@C 60 into a soluble derivative.…”

A Spherical Molecule with a Carbon‐Free Ih‐C80 Topological Framework

“…[6] In this case the I h -symmetric isomer was also found in low yields; however, no crystallographic confirmation has been obtained for these spherical systems. Only by the functionalization of the endofullerenes La 2 @C 80 [7] and Sc 4 O@C 80 [8] was it possible to receive structural information about such derivatives by Xray crystallography in order to confirm the original icosahedral symmetry. …”

Structural and electronic properties of ScnOm(n=1−3Yang1, Liu2, Zhang3 2011Phys. Rev. B8020View full textAdd to dashboardCite

“…Thirdly, some Sc oxide clusters have been recognized in the spectra of M-type stars 13,15 . Finally, some Sc oxide clusters can be steadily encapsulated into closed carbon cages of fullerenes to form a novel nanostructure [16][17][18] .…”