accessible. Furthermore, chiral bis(amidinate)–amido complexes [(S)‐PEBA}2LnN(SiMe3)2}] (Ln=Y, Lu) were synthesized by an amine‐elimination reaction and salt metathesis. All of these chiral bis‐ and tris(amidinate) complexes had additional axial chirality and they all crystallized as diastereomerically pure compounds. By using rac‐PEBA as a ligand, an achiral meso arrangement of the ligands was observed. The
最近报道的无
水镧系三
氯化物对
钾盐(S)-N,N'-双-(1-苯乙基)苯甲mid酸酯((S)-KPEBA)及其外消旋异构体(rac -KPEBA)的处理Er,Yb,Lu)主要提供手性配合物。三(酰胺基)络合物[(S)-PEBA} 3 Sm],双(酰胺基)络合物[Ln(PEBA)2(μ‐ Cl)} 2 ](Ln = Sm,Er,Yb,Lu),和单(酰胺基)化合物[Ln(PEBA)(Cl)2(thf)n分离(Ln = Sm,Yb,Lu)并进行结构表征。由于空间效应,较小的
镧系元素原子Yb和Lu的均质3:1络合物无法获得。此外,通过胺消除反应和盐复分解反应合成了手性双(酰胺基)-酰胺配合物[(S)-PEBA} 2 Ln N(SiMe 3)2 }](Ln = Y,Lu)。所有这些手性二-和三(酰胺基)配合物均具有额外的轴向手性,并且它们均以非对映体纯化合物的形式结晶。通过使用rac- PEB