Olefin oligomerization by main group Ga³⁺ and Zn²⁺ single site catalysts on SiO₂.

ABSTRACT: In heterogeneous catalysis, olefin oligomerization is typically performed on immobilized transition metal ions, such as Ni²⁺ and Cr³⁺. Here we report that silica-supported, single site catalysts containing immobilized, main group Zn²⁺ and Ga³⁺ ion sites catalyze ethylene and propylene oligomerization to an equilibrium distribution of linear olefins with rates similar to that of Ni²⁺. The molecular weight distribution of products formed on Zn²⁺ is similar to Ni²⁺, while Ga³⁺ forms higher molecular weight olefins. In situ spectroscopic and computational studies suggest that oligomerization unexpectedly occurs by the Cossee-Arlman mechanism via metal hydride and metal alkyl intermediates formed during olef

SUBMITTER: LiBretto NJ 

PROVIDER: S-EPMC8055657 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature