Inside Back Cover

gem ‐Bis(silanes) are valuable organosilicon compounds owing to their distinctive reactivity and broad synthetic potential. A highly efficient Co/Ni‐catalyzed dehydrogenative silylation/hydrosilylation of alkenes was developed for the construction of gem ‐bis(silanes), in which unanticipated nickel impurities were found to efficiently promote the key hydrosilylation step with a turnover number of up to 24000. Mechanistic studies further revealed a silicon‐based directing effect and nickel–hydride‐species‐dependent regiodivergent selectivity, enabling controlled access to geminal and vicinal bis(silanes). More details are discussed in the article by Lu et al. on pages 3349—3355. image