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Synthesis and Characterization of Iron and Cobalt Dichloride Bearing 2-Quinoxalinyl-6-iminopyridines and Their Catalytic Behavior Toward Ethylene Reactivity by Wen-Hua Sun; Peng Hao; Gang Li; Shu Zhang; Wenqing Wang; Jianjun Yi; Maliha Asma; Ning Tang is a Chemistry article available to read on EtoBox.
What is Synthesis and Characterization of Iron and Cobalt Dichloride Bearing 2-Quinoxalinyl-6-iminopyridines and Their Catalytic Behavior Toward Ethylene Reactivity about?
The 1-(6-(quinoxalin-2-yl)pyridin-2-yl)ethanone was synthesized in order to prepare a series of N- (1-(6-(quinoxalin-2-yl)pyridine-2yl)ethylidene)benzenamines (L1-L7), which provided new alternative N Ù N Ù N tridentate ligands coordinating with iron(II) and cobalt(II) dichloride to form complexes of general formula LFeCl 2 (1-7) and LCoCl 2 (8-14). All organic compounds were fully characterized by NMR, IR spectroscopic and elemental analysis along with and magnetic susceptibilities and metal complexes were examined by IR spectroscopic and elemental analysis, while their molecular structures (L1, L4, 1, 4, 10, 13) were confirmed by single crystal X-ray diffraction analysis. Upon activation with methylaluminoxane (MAO), all iron complexes gave good catalytic activities for ethylene reactivity (oligomerization and polymerization), while their cobalt analogues showed moderate activities toward ethylene oligomerization with modified methylaluminoxane (MMAO). Various reaction parameters were investigated for better catalytic activities, the higher activities were observed at elevated ethylene pressure. The iron and cobalt complexes with para-methyl substituents of aryl group linked on i
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- Author
- Wen-Hua Sun; Peng Hao; Gang Li; Shu Zhang; Wenqing Wang; Jianjun Yi; Maliha Asma; Ning Tang
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0022-328X)
- Published
- 2007
- Language
- EN
- Field
- Chemistry (Physical Sciences)