Phosphazene-Functionalized Cyclopentadienyl and Its Derivatives Ligated Rare-Earth Metal Alkyl Complexes: Synthesis, Structures, and Catalysis on Ethylene Polymerization
作者:Zhongbao Jian、Alex R. Petrov、Noa K. Hangaly、Shihui Li、Weifeng Rong、Zehuai Mou、Konstantin A. Rufanov、Klaus Harms、Jörg Sundermeyer、Dongmei Cui
DOI:10.1021/om300263p
日期:2012.6.11
bis(alkyl) complex 4a, [C5HMe3(η3-CH2)–PPh2═N–C6H3iPr2]Lu(CH2SiMe3)2(thf), and a bis(alkyl) complex 4b, (C5Me4–PPh2═N–C6H3iPr2)Lu(CH2SiMe3)2, were isolated. The protonolysis reaction of the IndPN-type ligands C9H7–PPh2═N–C6H3R2 (R = Me, L3(Me); R = Et, L3(Et); R = iPr, L3(iPr)) with Ln(CH2SiMe3)3(thf)2 (Ln = Sc, Y, and Lu) generated the IndPN-type bis(alkyl) complexes 5a–5c, 6, and 7a–7c, selectively
LN的治疗(CH 2森达3)3(THF)2(Ln为SC,Y,和Lu)与1个当量CpPN型的配体C ^ 5 ħ 4 ═PPh 2 -NH-C 6 H ^ 3 - [R 2(R = Me,L 1(Me) ; R = i Pr,L 1(i Pr))在室温下容易产生相应的CpPN型双(烷基)配合物1和2a - 2c。将3当量的LiCH 2 SiMe 3加入到以下混合物中L 1(i Pr)和LnCl 3(thf)2(Ln = Sm和Nd)也提供了CpPN型双(烷基)配合物2d和2e。在CP部分结合到中心金属在古典η 5在所有CpPN型模式络合物1和2。相反,Cp Me PN型配体C 5 Me 4 H–PPh 2 2N–C 6 H 3 R 2(R = Me,L 2(Me) ; R = i Pr,L 2(i Pr))表现不同。L 2(Me)不与Sc(CH2SiMe3)3(thf)2反应。类似地,即使在50℃下,L