Probing the effects of ligand structure on activity and selectivity of Cr(iii) complexes for ethylene oligomerisation and polymerisation
作者:Jerome O. Moulin、John Evans、David S. McGuinness、Gillian Reid、Adam J. Rucklidge、Robert P. Tooze、Moniek Tromp
DOI:10.1039/b716078j
日期:——
distorted octahedral Cr(III) complexes containing tridentate S-, S/O- or N-donor ligands comprised of three distinct architectures: facultative S(CH(2)CH(2)SC(10)H(21))(2) (L(1)) and O(CH(2)CH(2)SC(10)H(21))(2) (L(2))}, tripodal MeC(CH(2)S(n)C(4)H(9))(3) (L(3)), MeC(CH(2)SC(10)H(21))(3) (L(4))} and macrocyclic (C(10)H(21))[9]aneN(3) (L(5)), (C(10)H(21))(3)[9]aneN(3) (L(6)), with [9]aneN(3)=1,4,7-triazacyclononane}
包含三齿S-,S / O-或N-供体配体的一系列扭曲的八面体Cr(III)配合物,包含三种不同的结构:兼性S(CH(2)CH(2)SC(10)H(21) )(2)(L(1))和O(CH(2)CH(2)SC(10)H(21))(2)(L(2))},三脚架MeC(CH(2)S (n)C(4)H(9))(3)(L(3)),MeC(CH(2)SC(10)H(21))(3)(L(4))}和大环 (C(10)H(21))[9] aneN(3)(L(5)),(C(10)H(21))(3)[9] aneN(3)(L(6)) ,[9] aneN(3)= 1,4,7-三氮杂环壬烷}的报道和光谱表征。用MMAO活化[CrCl(3)(L)]会产生非常活跃的乙烯三聚,低聚和聚合催化剂,并且产物分布对存在的配体类型有很大的依赖性。母体[CrCl(3)(L)]配合物的性质通过循环伏安法,紫外可见光,EPR,EXA