On the cover of Angewante Chemie Int.
A cobalt norbornane sigma-alkane complex was synthesized by a single-crystal to single-crystal solid/gas hydrogenation from a norbornadiene precursor, as described by S. A. Macgregor, A. S. Weller et al. in their Communication. The cover picture shows the title cobalt sigma-alkane complex within its anion cage, with the van der Waals surface highlighted. The non-covalent
interactions provided by the anion cage are essential for the stabilization of this remarkable complex. The cover illustration was designed by Karl Harrison.