Nickel(II) complexes of bidentate N–N′ ligands containing mixed pyrazole, pyrimidine and pyridine aromatic rings as catalysts for ethylene polymerisation
作者:Belén Moreno-Lara、Sónia A. Carabineiro、Paramasivam Krishnamoorthy、Ana M. Rodríguez、João F. Mano、Blanca R. Manzano、Félix A. Jalón、Pedro T. Gomes
DOI:10.1016/j.jorganchem.2015.09.004
日期:2015.12
inactive. Other related Pd(II) complexes, already reported in previous works, such as [PdClMe(pzpm)], [PdClMe(pz*pm)], [PdClMe(pzpy)] and [PdClMe(bpz*mph)], also showed to be inactive in the polymerisation of ethylene, when activated by MAO or AlEt2Cl. Selected samples of polyethylene products were characterised by GPC/SEC, 1H and 13C NMR and DSC, showing to be low molecular weight polymers with Mn values
这项工作描述了以下含有吡唑(pz),嘧啶(pm)和吡啶(py)芳香环的中性双齿氮配体的Ni(II)配合物的合成和表征:2-pyrazol-1-yl-pyrimidine(pzpm) ,2-(4-甲基-吡唑-1-基)-嘧啶(4-Mepzpm),2-(4-溴-吡唑-1-基)-嘧啶(4-Brpzpm),2-(3,5-二甲基-吡唑-1-基)-嘧啶(pz * pm),2-吡唑-1-基-吡啶(pzpy)和双(3,5-二甲基吡唑-1-基)苯基甲烷(bpz * mph)。配合物[NiBr 2(pzpm)](1),[NiBr 2(4-Mepzpm)](2),[NiBr 2(4-Brpzpm)](3),[NiBr 2(pz * pm)](4),[NiBr 2(pzpy)](5)和[NIBR 2(BPZ *英里每小时)](6)进行测试作为催化剂用于乙烯聚合中,助催化剂甲基铝氧烷(MAO)或二乙基氯化铝(ALET存在2