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- W2007402590 abstract "A self-assembled Al-bridged diiminopyridine-based ligand (3) was synthesized and characterized by FT-IR, ESI-MS and NMR spectroscopy. Electron spectral titrations were performed to confirm the formation of a novel trinuclear bis(imino)pyridyl iron(II) complex (4) upon addition of <TEX>$FeCl_2$</TEX> into Al-bridged ligand 3 in methanol solution. Simultaneously, a typical bis(imino)pyridine-iron(II) complex (2) was synthesized and fully characterized. The X-ray crystal study of the iron(II) complex 2 disclosed a five-coordinate, distorted square-pyramidal structure with the tridentate N^N^N ligand and chlorides. The optimal molecular structure of 4 was obtained by means of molecular mechanics, which showed that each iron atom in the complex 4 is surrounded by two chlorides, a tridentate N^N^N ligand and one oxygen atom, supporting considerations about the possibility of six-coordinate geometry from MMAO or the ethylene access. A comparison of 4 with the reference 2 revealed a remarkable decrease of the catalytic activity and MMAO consumption (activity up to <TEX>$0.41{times}10^3;kg;{mol_{Fe}}^{-1}h^{-1}bar^{-1}$</TEX>, Al/Fe = 650 for 4 and <TEX>$7.02{times}10^3;kg;{mol_{Fe}}^{-1}h^{-1}bar^{-1}$</TEX>, Al/Fe = 1600 for 2)." @default.
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- W2007402590 date "2011-08-20" @default.
- W2007402590 modified "2023-09-26" @default.
- W2007402590 title "A Novel Al-Bridged Trinuclear Iron(II) Bis(imino)pyridyl Complex with Catalytic Ethylene Polymerization Behavior" @default.
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- W2007402590 doi "https://doi.org/10.5012/bkcs.2011.32.8.2537" @default.
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