In this issue, S. Mecking et al. review the utility of post-metallocene catalysts in the industrial production of polyolefins. What are the decisive properties for the success of a given catalyst structure? S. García-Gallego and G. J. L. Bernardes discuss molecules for the in vivo delivery of therapeutic amounts of carbon monoxide. The Highlight deals with the astonishing career of mesoionic münchnones (H.-U. Reissig and R. Zimmer).

In the Communications section, R. J. Hamers et al. explain the selective photoelectrochemical reduction of aqueous CO₂ to CO by solvated electrons (see picture). E. Borguet et al. succeeded in the preparation of orientation-controlled single-molecule junctions. M. Müller et  al. report on the role of hydronaphthoquinone tautomers in biosynthesis, and H. Sun et al. show how to easily construct 1,3-oxazinan-4-ones in three-component cycloadditions.

• Angewandte Chemie 37/2014: Amazing Stories,
  Angew. Chem. Int. Ed. 2014, 37.