1335136-82-7Relevant academic research and scientific papers
2-[1-(2,6-Dibenzhydryl-4-methylphenylimino)ethyl]-6-[1-(arylimino)ethyl] pyridylcobalt(ii) dichlorides: Synthesis, characterization and ethylene polymerization behavior
Yu, Jiangang,Huang, Wei,Wang, Lin,Redshaw, Carl,Sun, Wen-Hua
, p. 10209 - 10214 (2011)
A series of unsymmetrical 2,6-bis(imino)pyridylcobalt(ii) complexes, {2-[2,6-(CH(C6H5)2)2-4-Me-C 6H2NC(CH3)]-6-(2,6-R1 2-4-R2-C6H2NCCH3)-C 5H3NCoCl2} where R1 = Me, Et or iPr, R2 = H or Me, together with the new symmetrical complex 2,6-[2,6-(CH(C6H5)2) 2-4-Me-C6H2NC(CH3)] 2-C5H3NCoCl2, were synthesized. All of the compounds were fully characterized by 1H NMR and IR spectroscopy, as well as by elemental analysis. The molecular structures of Co1 (R1 = Me, R2 = H) and Co5 (R1 = Et, R 2 = Me) were further confirmed by single crystal X-ray diffraction, which indicated that the cobalt centres were penta-coordinate with a pseudo square-pyramidal geometry. Upon treatment with MAO or MMAO, these cobalt pre-catalysts exhibited higher activities than any previously reported cobalt pre-catalysts, with values as high as 4.64 × 106 g PE mol -1(Co) h-1 for ethylene polymerization at atmospheric pressure. The polyethylenes obtained were of high molecular weight and narrow molecular weight distribution. The Royal Society of Chemistry 2011.
