Abstract Invited for the cover of this issue is the group of Taniyuki Furuyama at Kanazawa University. The image depicts photostable electron‐withdrawing group substituted phthalocyanine against singlet oxygen. Read the full text of the article at 10.1002/chem.201805082 .

Abstract Invited for the cover of this issue is Shilie Pan and co‐workers at Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences. The first rare‐earth iodate fluoride, Ce(IO 3 ) 2 F 2 ⋅H 2 O, has been synthesized, which produces a large second harmonic generation response. Read the full text of the article at 10.1002/chem.201804995 .

Rechargeable superoxide batteries have the potential to surpass current lithium-ion technology due to their high theoretical energy densities. The use of superoxides as an energy storage material is highly advantageous when compared to their close relatives, peroxides. The two most studied systems are sodium and potassium-oxygen batteries. Both batteries present unique advantages and challenges. For more information, see the Minireview by Y. Wu et al. on page 17627 ff.

Like beautiful magic, the novel synthetic method described in this paper was used to prepare osmanaphthalynes, osmaanthracyne, and osmaphenanthryne. Under this kind of “magic”, the dragons (which represent the osmium compounds) transform into different shapes. The colors of the dragons correspond to the colors of the compounds reported. More information can be found in the Communication by J. Yin, S. H. Liu et al. on page 14891.

Caging N-heterocyclic carbene (NHC)–metal complexes in molecular or polymeric structures can confer them with interesting properties. In their Minireview on page 12464 ff., S. Roland, J. M. Suarez and M. Sollogoub discuss the benefits of caging for the selectivity of reactions catalyzed by such confined NHC–metal complexes. The confinement has been shown to induce selectivities, which are of various types ranging from on/off reaction switches, substrate selection or stereoselectivity to regioselectivity and product distribution variation.

Like the man heaving a rope on the background of this frontispiece, a Lewis acid can pull electron density from a metal into its dinitrogen ligand to which it pairs thanks to a Lewis acid–base interaction. In their Concept article on page 12458 ff., A. Simonneau and M. Etienne highlight the implication of such pairing in terms of bonding and reactivity with examples taken from the recent literature. The relevance of such complexes to the nitrogenases, homogeneous N2 reduction as well as the chemistry of frustrated Lewis Pairs is also emphasized.