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• W1993373787 abstract "Abstract Three new camphor–titanium complexes [TiClCp 2 L] (L =  1 L, ( 1 ); 2 L, ( 2 ) and 3 LH ( 3 )) were obtained through replacement of one chloride by a camphor-type ligand ( 1 LH, 2 LH, 3 LH 2 ( 3 )) at the coordination sphere of [TiCl 2 Cp 2 ]. Complexes 1 and 2 were structurally characterized by X-ray diffraction analysis showing that coordination occurs through the oxygen atom of the hydroxo group ( 1 ) with cooperative coordination of the nitrogen atom of the oxime complex in 2 . Upon activation with MAO complexes 1 and 2 promote ethylene polymerization and ethylene/norbornene co-polymerization while compound 3 displays no catalytic activity for either one or the other process. At 50 °C the catalytic activity complex of 2 (852 kg PE  mol −1  h −1 ) for ethylene polymerization is higher than that of compound 1 (668 kg PE  mol −1  h −1 ) which is similar to that of [TiCl 2 Cp 2 ] (670 kg PE  mol −1  h −1 ). The catalytic activity of complex 1 displays a higher dependence on the temperature than that of compound 2 which is attributed to the strength of the Ti–O bond that renders generation of the active site more difficult in 1 . Compounds 1 and 2 are also active catalysts for co-polymerization of ethylene with norbornene affording copolymers with approximately 15 mol% of norbornene content. The microstructures of the polyethylenes and ethylene norbornene co-polymers were checked by NMR and their melting points were measured by DSC." @default.
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• W1993373787 date "2012-03-01" @default.
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• W1993373787 title "Synthesis and catalytic activity of camphor titanium complexes" @default.
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• W1993373787 doi "https://doi.org/10.1016/j.ica.2011.11.019" @default.
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