Tetrahydropentalenyl-phosphazene constrained geometry complexes of rare-earth metal alkyls
作者:Noa K. Hangaly、Alexander R. Petrov、Michael Elfferding、Klaus Harms、Jörg Sundermeyer
DOI:10.1039/c3dt53596g
日期:——
[Lu(CH2SiMe3)3(thf)2] or with rare-earth metal halides and three equivalents of LiCH2SiMe3 produced the desired bis(alkyl) Cp™PN complexes: [Cp™PN}M(CH2SiMe3)2] (M = Sc (1Ad, 1Dip), Lu (2Ad, 2Dip), Y (3Ad, 3Dip), Sm (4Ad), Nd (5Ad), Pr (6Ad), Yb (7Ad)). These complexes were characterized by extensive NMR studies for the diamagnetic and the paramagnetic complexes with full signal assignment. An almost
Cp™HPPh 2(1,二苯基(4,4,6,6-四甲基-1,4,5,6-四氢戊二烯-2-基)膦)与有机叠氮化物AdN 3和DipN 3(Ad = 1 -金刚烷基; Dip = 2,6-二异丙基苯基)导致形成两个新的CpPN配体:P-氨基-环戊二烯叉叉基-正膦(Cp™PPh 2 NHAd;L Ad H)和P-环戊二烯基-亚氨基正膦( Cp™HPPh 2 NDip; L浸入H)。两者均通过NMR光谱和X射线结构分析来表征。对于这两种化合物,仅观察到一种异构体。两者都不具有任何可检测到的质子或元亲异构体。这些配体与[Lu(CH 2 SiMe 3)3(thf)2 ]或与稀土金属卤化物和三当量的LiCH 2 SiMe 3的反应产生了所需的双(烷基)Cp™PN络合物:[Cp™ PN} M(CH 2 SiMe 3)2 ](M = Sc(1 Ad,1 Dip),Lu(2 Ad,2 Dip),Y(3Ad,3