Late Transition Metal Catalysts Based on Iron:Synthesis, And Ethylene Polymerization

In1998, Brookhart, Bennettand Gibson independently discovered that five-coordinate 2,6-bis(imino) pyridine BIMP)Fe(II) and Co(II) dihalides ,activated by MAO, areEffective catalysts for the conversion of ethylene either to high-density polyethylene or to α-olefins[1-2] Remarkably, theproductivities were as high as those of most efficient metallocens [3]. An iron-based catalyst of 2,6-bis-{1-(2- methylphenylimino) ethyl}pyridine iron dichloride was prepared and used for ethylene polymerization