Methylaluminoxane-Free Chromium Catalytic System for Ethylene Tetramerization.

ABSTRACT: Ethylene tetramerization catalyst systems comprising a Cr(III) complex containing PNP ligands and methylaluminoxane (MAO) are useful for the production of 1-octene. However, a concern with these systems is the use of expensive MAO in excess. Herein, we report a catalytic system that avoids the use of MAO. Metathesis of CrCl₃(THF)₃ and [(CH₃CN)₄Ag]⁺[B(C₆F₅)₄]^- afforded [L₄Cr^IIICl₂]⁺[B(C₆F₅)₄]^- (L = CH₃CN or tetrahydrofuran (THF)), which was converted to [(PNP)CrCl₂L₂]⁺[B(C₆F₅)₄]^-, where PNP is iPrN(PPh₂)₂

SUBMITTER: Kim EH 

PROVIDER: S-EPMC6641062 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature