Initiating olefin metathesis: alkylidenes from molecular Mo(iv)-oxo species, olefins and base-promoted proton transfer.

ABSTRACT: In olefin metathesis, metal alkylidenes and metallacyclobutanes are the two key intermediates of the Chauvin mechanism. In industrial metathesis catalysts based on supported group 6 metal oxides (e.g. MO _x /SiO₂), these intermediates, proposed to be in the +VI oxidation state, are postulated to be formed in situ from olefins and transient low-valent species in the +IV oxidation state. While recent studies have shown that molecularly-defined W(iv)-oxo species initiate olefin metathesis through C-H bond activation and proton transfer steps to generate metallacyclobutanes, less is known about the corresponding Mo-based systems. Here, we report the synthesis of a pyridine-stabilized Mo(iv)-oxo compound, [MoO(OC(CF₃)₃)₂

SUBMITTER: Nater DF 

PROVIDER: S-EPMC12593810 | biostudies-literature | 2025 Dec

REPOSITORIES: biostudies-literature