Scandium and gadolinium complexes with aryldiimine NCN pincer ligands: Synthesis, characterization, and catalysis on isoprene and 1,5-hexadiene polymerization
作者:Teng Jia、Shu-yun Xu、Li-cheng Huang、Wei Gao
DOI:10.1016/j.poly.2018.02.010
日期:2018.5
analysis and the solid structures of 1c, 1d, 1f, and 2b were confirmed by X-ray diffraction analysis to be monomeric with N,C,N-tridentate ligands coordinating to the metal center in a typical meridional manner. In the presence of alkylaluminium and trityl borate, these well-defined complexes showed moderate to high activities in isoprene polymerization affording cis-1,4 enriched polymers (up to 98.3%). Moreover
摘要带有三齿芳基二亚胺NCN钳形配体Ar [NCNH] ScCl2(THF)2(Ar = Ph(1a); Ar = 2,6-Me2C6H3(1b),Ar = 2,6-Et2C6H3(1c)的几种scan和ado配合物,Ar = 2,6-iPr2C6H3(1d),Ar = p-MeC6H4(1e),Ar = 2,4,6-Me3C6H2(1f)),Ar [NCNMe] MCl2(THF)2(M = Sc,Ar = 2,6-Me 2 C 6 H 3(2b); M = Gd,Ar = 2,6-Me 2 C 6 H 3(3b),Ar = 2,6-iPr 2 C 6 H 3(3d)),并通过锂合成iPrPh [NCNMe] ScCl 2(2d)。用nBuLi制备相应的配体,然后分别加入ScCl 3(THF)3或GdCl 3(THF)3。这些配合物通过元素分析得到了很好的表征,X射线衍射分析证实了1c,