Lanthanide Complexes of the Chiral Hexaaza Macrocycle and Its <i>meso</i>-Type Isomer: Solvent-Controlled Helicity Inversion
作者:Janusz Gregoliński、Katarzyna Ślepokura、Jerzy Lisowski
DOI:10.1021/ic700831z
日期:2007.9.1
two stable forms. Both forms of the Yb(III) complex have been isolated, and their interconversion was studied in various solvents. The two forms of [YbL]3+ complex correspond to two diastereomers of ligand L, which differ in the sense of the helical twist and the configuration at the stereogenic amine nitrogen atoms. In one of the stereoisomers, the macrocycle L of (RRRR) configuration at the stereogenic
对映纯手性六氮杂四胺大环L,2(R),7(R),18(R),23(R)-1,8,15,17,24,31-六氮杂三环[25.3]的镧系元素(III)配合物。 1.1.0.0] -dotriaconta-1 0,12,14,26,28,30-己烯及其内消旋型2(R),7(R),18(S),23(S)-异构大环L1,已经合成并通过光谱方法表征。2D NMR光谱证实了这些络合物的身份,并表明了[LnL] 3+的C2对称性和[LnL1] 3+络合物的Cs对称性。[PrL(NO3)(H2O)2](NO3)2,[EuL(NO3)(H2O)2](NO3)2,[DyL(NO3)2] 2 [Dy(NO3)5]的晶体结构x 5CH3CN,[YbL(NO3)2] 2 [Yb(NO3)5] x 5CH3CN,[YbL(H2O)2](NO3)3 x H2O和[EuL1(NO3)(H2O)2] 0.52 [EuL1(已经通过单晶X射线衍射确定了NO