Magnetic Core–Shell Nanoparticles as Carriers for Olefin Dimerization Catalysts

Abstract We report the covalent support of functionalized nickel complexes on magnetic core–shell hybrid particles γ‐Fe 2 O 3 /SiO 2 . Two completely different ways of connecting the particle with these nickel complexes were carried out. The first approach used the hydrosilylation method between the alkene‐substituted nickel complex and a silane. In a second approach, the particles were connected with the complexes by means of click chemistry (copper‐catalyzed Huisgen 1,3‐dipolar cycloaddition). For this purpose, the nickel complexes were substituted with an alkyne moiety. Transmission and scanning electron microscopies, energy‐dispersive X‐ray diffraction, and FTIR spectroscopy were the methods employed to characterize the successful heterogenization of the nickel complexes.