Nickel complexes bearing substituted 2-(naphthylen-1-yl)iminopyridines as catalysts for the formation of highly branched unsaturated PE waxes
作者:Wenhua Lin、Qiuyue Zhang、Liping Zhang、Gregory A. Solan、Yanping Ma、Xiang Hao、Wen-Hua Sun
DOI:10.1016/j.polymer.2023.125994
日期:2023.6
low molecular weight polyethylene (Mw range: 0.81–3.50 kg mol−1) with low melting temperature and narrow dispersity. 13C NMR spectroscopic analyses of these polyethylenic waxes revealed the formation of branched macromolecules with branching densities up to 69 per 1000 carbons. Further analysis revealed these polymers to contain predominantly methyl branches (%Me range: 7.8–9.0), with lower levels of
一组六个 2-亚氨基吡啶-镍 (II) 络合物,[2-C(Me)=NAr}C 5 H 4 N]NiCl 2 (Ar = 1-C 10 H 7 Ni1 , 2-Me-1- C 10 H 6 Ni2 , 2-(CHMePh)-1-C 10 H 6 Ni3 , 4-(NNC 6 H 5 )-1-C 10 H 6 Ni4 , 4-(NNC 6 H 4 -4-Me)- 1-C 10 H 6 Ni5 , 4-(NNC 6 H 4 -4-F)-1-C 10 H 6 Ni6 ), 所有N-用 naphthalen-1-yl 或其取代的烷基或 aryldiazenyl 衍生物进行功能化,很容易从它们相应的游离N,N-配体L1 – L6合成。在Ni3的结晶过程中,氯化物桥接的三金属化合物 [( L3 ) 3 Ni 3 Cl 6 (OH 2 )] 通过单晶 X 射线衍射鉴定为水加合物。当用 MAO 或 MMAO