Small Steric Variations in Ligands with Large Synthetic and Structural Consequences
作者:Sadaf Qayyum、Kristina Haberland、Craig M. Forsyth、Peter C. Junk、Glen B. Deacon、Rhett Kempe
DOI:10.1002/ejic.200701098
日期:2008.2
analysis of 3 revealed a four-coordinate ytterbium atom with two chelating (N,N') Ap' ligands inclined to each other at an angle of 126.93(7)° (Cl–Yb–C26). Additionally the complex forms intermolecular CAryl–H agostic interactions [Yb1···C17 2.981(2) A and Yb1···H17 2.56(3) A] (all H atoms refined). Complex 4 contains a six-coordinate ytterbium atom having three chelating (N,N') ApMe ligands and has distorted
镱金属与氨基吡啶2,6-(二异丙基苯基)-[6-(2,6-二甲基苯基)吡啶-2-基]胺(1,Ap'H)和(2,4,6-三甲基苯基)-的反应[6-(2,4,6-三甲基苯基)吡啶-2-基]胺(2,ApMeH)在真空和高温下,在汞存在下产生二价[Yb(Ap')2](3)和分别为三价 [Yb(ApMe)3] (4)。3的单晶X射线结构分析揭示了一个四配位镱原子与两个螯合(N,N')Ap'配体以126.93(7)°(Cl-Yb-C26)的角度相互倾斜. 此外,复合物形成分子间 CAryl-H 积极相互作用 [Yb1...C17 2.981(2) A 和 Yb1...H17 2.56(3) A](所有 H 原子精制)。配合物 4 包含一个六配位镱原子,具有三个螯合 (N,N') ApMe 配体,并具有扭曲的八面体立体化学。Ap'H (5) 和 ApMeH (6) 的钾盐与 [YbI2 (thf)4] 在