6-bis(hexamethylene)pyridine with the corresponding aniline and cobalt(II) chloride in acetic acid. The molecular structures of Co2 and Co3 reveal distorted square pyramidal geometries with two conformationally flexible eight-membered rings, a feature of the ligand manifold. On activation with either methylaluminoxane (MAO) or modified MAO (MMAO), all five complexes displayed high catalytic activities for ethylene
五个不同的α,α'-双(芳基)-2,3:5,6-双(六亚甲基)
吡啶-
氯化钴(II)络合物,[2,3:5,6- C 5 H 10 C(NAr )} 2 C 5 HN] CoCl 2(Ar = 2,6-Me 2 C 6 H 3,Co1 ; 2,6-Et 2 C 6 H 3,Co2 ; 2,6- i -Pr 2 C 6 H 3,Co3 ; 2,4,6-Me 3 C 6 H 2,Co4 ; 2,6-Et 2 -4-MeC 6H 2,Co5),是通过在
乙酸中通过一锅模板反应由α,α'-二氧代-2,3:5,6-双(六亚甲基)
吡啶与相应的
苯胺和
氯化钴(II)反应而合成的。Co2和Co3的分子结构揭示了具有两个构象柔性的八元环的扭曲的方锥几何形状,这是
配体流形的特征。在用甲基铝氧烷(MAO)或改性的MAO(
MMAO)活化后,所有五种配合物均表现出对
乙烯聚合的高催化活性(高达3.62×10 6 g PE mol