Ethylene polymerization in supercritical carbon dioxide with binuclear nickel(ii) catalysts

• DOI: 10.1039/b912883b
• Publication Date: 2009-09-21T12:31:12Z
• Authors: Damien Guironnet; Tobias Friedberger; Stefan Mecking
• Keywords: Supercritical Carbon Dioxide; Branching (polymer chemistry); Moiety

A series of new, highly fluorinated neutral (kappa(2)-N,O) chelated Ni(II) binuclear complexes based on salicylaldimines bridged in p-position the N-aryl group were prepared. The are single-component catalyst precursors for ethylene polymerization supercritical carbon dioxide and toluene. Solubility is effected by a large number up to 18 trifluoromethyl groups per molecule. Semicrystalline polyethylene with low degree branching formed (ca. 10 branches/1000 atoms). Polymer microstructures independent nature bridging moiety, while stability catalysts appears differ.