Breaking Symmetry Relaxes Structural and Magnetic Restraints, Suppressing QTM in Enantiopure Butterfly Fe
<sub>2</sub>
Dy
<sub>2</sub>
SMMs**
作者:Amer Baniodeh、Danny Wagner、Yan Peng、Hagen Kaemmerer、Nicolas Leblanc、Stefan Bräse、Jean‐Valére Naubron、Christopher E. Anson、Annie K. Powell
DOI:10.1002/chem.202103360
日期:2021.11.2
These 2 coordination clusters are similar but different both in the fine details of their structures as well as their magnetic behaviour. [Fe2Dy2(μ3-OH)2(Me-teaH)2(O2CPh)6], which normally forms with the racemic version of Me-teaH3 by using enantiopure ligand, allows access to the S-version, but for the R-version there is significant racemisation. Surprisingly, by using the synthesis of [Fe2Dy2(μ3
这两个配位簇在结构细节和磁性行为方面相似但又不同。[Fe 2 Dy 2 (μ 3 -OH) 2 (Me-teaH) 2 (O 2 CPh) 6 ]通常通过使用对映体纯配体与 Me-teaH3 的外消旋形式形成,允许获得S版本,但对于R版本,存在显着的外消旋作用。令人惊奇的是,通过使用[Fe 2 Dy 2 (μ 3 -OH) 2 (Me-teaH) 2 (O 2 CPh) 4 (NO 3 ) 2 ]的合成,获得了对映体纯的R-和S-化合物。在这两种情况下,母体化合物对称性的破坏都会导致 SMM 行为的增强。