Chiral Palladium(II) and Nickel(II) Complexes with <i>C</i><sub>2</sub>-Symmetrical Tridentate Bis(oxazoline) Ligands: Synthesis, Characterization, and Catalytic Norbornene Polymerization
作者:Jianyun He、Zhanxiong Liu、Gaixia Du、Yinxia Fu、Shaowen Zhang、Xiaofang Li
DOI:10.1021/om5007616
日期:2014.11.10
A series of chiral palladium(II) and nickel(II) complexesbearing a C2-symmetric monoanionic tridentate bis(oxazoline) ligand, (R2-(S,S)-BOZ)M(X) (1–6: R = CH(CH3)2, M = Pd, X = OAc (1); R = CH(CH3)2, M = Pd, X = Cl (2); R = Ph, M = Pd, X = Cl (3); R = Ph, M = Ni, X = Cl (4); R = CH(CH3)2, M = Ni, X = Cl (5); R = CH(CH3)2, M = Pd, X = OTf (6)), have been synthesized and structurally characterized.
一系列带有C 2对称单阴离子三齿双(恶唑啉)配体(R 2-(S,S)-BOZ)M(X)的手性钯(II)和镍(II)配合物(1 – 6:R = CH(CH 3)2,M = Pd,X = OAc(1); R = CH(CH 3)2,M = Pd,X = Cl(2); R = Ph,M = Pd,X = Cl (3); R = Ph,M = Ni,X = Cl(4); R = CH(CH 3)2,M = Ni,X = Cl(5); R = CH(CH 3)2,M = Pd,X = OTf(6)),已经合成并进行了结构表征。实验结果表明,这种带有C 2对称三齿配体的手性钯(II)和镍(II)配合物在其中单阴离子基团位于内部,对降冰片烯聚合是有效的。在各种助催化剂如MAO,MMAO和活化剂/ AlR 3的存在下,这些手性钯(II)络合物显示出高达4.8×10 8 g的PNB(Pd摩尔)-1 h –1