A Self‐Assembled Homochiral Radical Cage with Paramagnetic Behaviors
Tianyu Jiao, Hang Qu, Tong Lu, Xiaoyu Cao, Hao Li
Abstract
-symmetric polychlorotriphenylmethyl (PTM) radical trisaldehyde with tris(2-aminoethyl)amine (TREN) yields a [4+4] tetrahedral radical cage as a racemic pair of homochiral enantiomers in 75 % isolated yield. The structure was characterized by X-ray crystallography, confirming the homochirality of each cage framework. The homochirality results from intramolecular [CH⋅⋅⋅π] and hydrogen-bonding interactions within the cage framework. The four PTM radicals in a cage undergo weak through-space coupling. Magnetic measurements demonstrated that each cage bears 3.58 spins.
Topics & Concepts
HomochiralityCageChemistryIntramolecular forceCrystallographyRadicalHydrogen bondEnantiomerYield (engineering)ParamagnetismAmine gas treatingStereochemistryMaterials scienceMoleculeOrganic chemistryPhysicsCondensed matter physicsMathematicsMetallurgyCombinatoricsMagnetism in coordination complexesSupramolecular Chemistry and ComplexesMetal-Organic Frameworks: Synthesis and Applications