Sc3CH@C80: selective 13C enrichment of the central carbon atom

Katrin Junghans; Marco Rosenkranz; Alexey A. Popov

doi:10.1039/C5CC10025A

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Sc₃CH@C₈₀: selective ¹³C enrichment of the central carbon atom†

Katrin Junghans,^a Marco Rosenkranz^a and Alexey A. Popov*^a

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* Corresponding authors

^a Leibniz Institute for Solid State and Materials Research, 01069 Dresden, Germany
E-mail: a.popov@ifw-dresden.de

Abstract

Sc₃CH@C₈₀ is synthesized and characterized by ¹H, ¹³C, and ⁴⁵Sc NMR. A large negative chemical shift of the proton, −11.73 ppm in the I_h and −8.79 ppm in the D_5h C₈₀ cage isomers, is found. ¹³C satellites in the ¹H NMR spectrum enabled indirect determination of the ¹³C chemical shift for the central carbon at 173 ± 1 ppm. Intensity of the satellites allowed determination of the ¹³C content for the central carbon atom. This unique possibility is applied to analyze the cluster/cage ¹³C distribution in mechanistic studies employing either ¹³CH₄ or ¹³C powder to enrich Sc₃CH@C₈₀ with ¹³C.

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Article information

DOI: https://doi.org/10.1039/C5CC10025A
Article type: Communication
Submitted: 07 Dec 2015
Accepted: 18 Apr 2016
First published: 18 Apr 2016
This article is Open Access

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Chem. Commun., 2016,52, 6561-6564

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Sc₃CH@C₈₀: selective ¹³C enrichment of the central carbon atom

K. Junghans, M. Rosenkranz and A. A. Popov, Chem. Commun., 2016, 52, 6561 DOI: 10.1039/C5CC10025A

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