Sc3CH@C80: selective (13)C enrichment of the central carbon atom.
Sc3CH@C80 is synthesized and characterized by (1)H, (13)C, and (45)Sc NMR. A large negative chemical shift of the proton, -11.73 ppm in the Ih and -8.79 ppm in the D5h C80 cage isomers, is found. (13)C satellites in the (1)H NMR spectrum enabled indirect determination of the (13)C chemical shift for the central carbon at 173 ± 1 ppm. Intensity of the satellites allowed determination of the (13)C content for the central carbon atom. This unique possibility is applied to analyze the cluster/cage (13)C distribution in mechanistic studies employing either (13)CH4 or (13)C powder to enrich Sc3CH@C80 with (13)C.
Leibniz Institute for Solid State and Materials Research, 01069 Dresden, Germany. a.popov@ifw-dresden.de.
Katrin
K
Junghans
Leibniz Institute for Solid State and Materials Research, 01069 Dresden, Germany. a.popov@ifw-dresden.de.
Marco
M
Rosenkranz
Leibniz Institute for Solid State and Materials Research, 01069 Dresden, Germany. a.popov@ifw-dresden.de.
Alexey A
AA
Popov