(R,R)-环己基桥联双脒基稀土金属配合物的合成与表征  

Synthesis and Characterization of Rare-earth Metal Complexes Supported by(R,R)-Cyclohexyl Linked Bis(amidinate)Ligand

作　　者：王祥瑞 佘舒勤 储明辰 王芬华[1] WANG Xiangrui;SHE Shuqin;CHU Mingchen;WANG Fenhua(School of Chemical and Environmental Engineefing,Anhui Polytechnic University,Wuhu 241000,China)

机构地区：[1]安徽工程大学化学与环境工程学院,安徽芜湖241000

出　　处：《安徽工程大学学报》2023年第2期1-6,42,共7页Journal of Anhui Polytechnic University

基　　金：安徽省重点实验室开放课题基金资助项目(LCCE-01)。

摘　　要：改变脒基骨架中C原子和N原子上的取代基团,可以调控脒基配体的空间位阻效应和电子效应以满足配位需求。因此,脒类化合物被广泛用作配体。手性环己基桥联双脒基配体{(R,R)-Cy-1,2-[NHCN(^(t)Bu)C_(6)H_(5)]}与离子型三胺基稀土金属配合物通过硅胺基消除反应得到了一系列结构新颖的手性环己基桥联双脒基配合物(R,R)-Cy-1,2-[NCN(tBu)C_(6)H_(5)]REN(SiMe_(3))_(2)(RE=Y(1)Er(2),Yb(3))。配合物的结构经过X-射线单晶衍射、核磁及元素分析表征,结果表明,配合物为正交晶系,空间群为P2_(1)2_(1)2_(1),配合物是由两个脒基分别以κ^(2)-N,N′,η^(1)的配位模式与金属中心成键,一个硅胺基[-N(SiMe_(3))_(2)]及一个四氢呋喃溶剂分子组成的单核五配位结构。The amidinate ligand can be regulated to meet the coordination requirements by changing the substituent groups on C and N atoms with the steric and electronic effects.So,the compounds containing amidinate group were widely used as ligand.A series of cyclohexyl linked bis(amidinate)rare-earth complexes(R,R)-Cy-1,2-[NCN(^(t)Bu)C_(6)H_(5)]2REN(SiMe_(3))_(2)(RE=Y(1),Er(2),Yb(3))were synthesized by((R,R)-Cy-1,2-[NHCN(^(t)Bu)C_(6)H_(5)])and ionic complex of[(Me_(3)Si)_(2)N]_(3)RE(μ-Cl)Li(THF)_(3)through silylamine elimination reaction.The complexes were characterized by single-crystal X-ray diffraction studies,NMR and elemental analysis.The results show that complexes are in the orthorhombic system with the P2_(1)2_(1)2_(1)space group.It revealed the complexes were mononuclear with unusual quinquidentate modes,including two amidinate group inκ^(2)-N,N′andη^(1)chelating mode,respectively,and accomplished by one amido group and one solvent molecular THF.

关 键 词：(R R)-环己基 桥联双脒配体 稀土配合物 

分 类 号：O627.3[理学—有机化学]