Synthesis and characterization of iron and cobalt dichloride bearing 2-quinoxalinyl-6-iminopyridines and their catalytic behavior toward ethylene reactivity
作者:Wen-Hua Sun、Peng Hao、Gang Li、Shu Zhang、Wenqing Wang、Jianjun Yi、Maliha Asma、Ning Tang
DOI:10.1016/j.jorganchem.2007.04.027
日期:2007.10
and cobalt(II) dichloride to form complexes of general formula LFeCl2 (1–7) and LCoCl2 (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
合成1-(6-(喹喔啉-2-基)吡啶-2-基)乙酮以制备一系列N-(1-(6-(喹喔啉-2-基)吡啶-2-基)。亚乙基)benzenamines(L1 - L7),其提供了新的备选方案N ∧ ñ ∧ ñ三齿配体与铁(II)和钴(II)二氯化物,以通式的形式络合物LFeCl协调2(1 - 7)和LCoCl 2(8 – 14)。将所有的有机化合物完全表征通过NMR,IR光谱和具有和磁化率和金属配合物由红外光谱和元素分析检测沿元素分析,而它们的分子结构(L1,L4,1,4,10,13通过单晶X射线衍射分析来确认)。经甲基铝氧烷(MAO)活化后,所有铁络合物均具有良好的乙烯反应性(低聚和聚合)催化活性,而其钴类似物对改性甲基铝氧烷(MMAO)的乙烯低聚具有中等活性。研究了各种反应参数以获得更好的催化活性,在升高的乙烯压力下观察到更高的活性。在亚氨基上连接有芳基的对甲基取代基的铁和钴配合物显示出最高的活性。