Cover Feature: Cyclic Ruthenium(II)−Halocarbon Complexes Derived from Ru(II)‐Induced Cyclization of Homopropargylic Halopyridines: Mechanism, Bonding and Reactivity (Chem. Eur. J. 2/2025)

Cyclization of homopropargylic halopyridines on RuII/OsII centers leads to the formation of cyclic Ru–/Os–halocarbon complexes with rare M−X−R bonding interactions, where the metal center acts as a “molecular homewrecker” to pull the halogen atom from the pyridyl ring. This interaction highlights the importance of metal–halocarbon bonds in catalytic and coordination design. More details are available in the Research Article by C.-Y. Wong and co-workers (DOI: 10.1002/chem.202403736).