Pyrazolylimine iron and cobalt, and pyrazolylamine nickel complexes: Synthesis and evaluation of nickel complexes as ethylene oligomerization catalysts
作者:Michael K. Ainooson、Ilia A. Guzei、Lara C. Spencer、James Darkwa
DOI:10.1016/j.poly.2013.01.018
日期:2013.4
with Fe(II) and Co(II) salts ( 1 – 6 ), reactions involving Ni(II) salts resulted in hydrolysis of the Schiff base ligands used to form a novel tetranuclear cubane-like cluster [Ni 4 (3,5-Me 2 pza) 4 Cl 8 ] ( 7 ) (pza = (3,5-dimethylpyrazol-1yl)ethylamine) and mononuclear [Ni(3,5-R 2 pza)Br 2 ] (R = H ( 8 ); R = Me ( 9 ) complexes. Molecular structures of five complexes ( 1 , 5 – 7 and 9 ), determined
摘要从2,4-二叔丁基-6-[(2-(3,5- RR-吡唑-1-基-乙基亚氨基)甲基]-苯酚},R = H(L1),Me(L2),Ph(L3),[(3,5-二叔丁基-2-乙氧基亚苄基)-[2-(3,5-二甲基-吡唑-1-基)-乙基]胺(L4)和(4-(4-叔丁基-亚苄基)-[2-(3,5-二甲基-吡唑-1-基)乙基]-亚胺)(L5)将配体L1-L5与MX 2(M = Fe,Co,Ni; X = Cl,Br)反应形成三种类型的配合物。 N ^ N结合的配合物与Fe(II)和Co(II)盐(1-6)形成,涉及Ni(II)盐的反应导致席夫碱配体的水解,该席夫碱配体被水解以形成新的四核古巴样簇[ Ni 4(3,5-Me 2 pza)4 Cl 8](7)(pza =(3,5-二甲基吡唑-1基)乙胺)和单核[Ni(3,5-R 2 pza)Br 2](R = H(8); R = Me(9)配合物。通过单晶X射线衍射测定的五个配合物(1、5