[2]Pseudorotaxane Formation with N-Benzylanilinium Axles and 24-Crown-8 Ether Wheels

摘要

As a hybrid of the N,N-dibenzylammonium and 1,2-bis(pyridinium)ethane axles,various N-benzylanilinium cations were investigated as suitable axles for the formation of [2]pseudorotaxanes with the 24-membered crown ethers 24C8 and DB24C8.The effect of electron-donating OCH_3 and electron-withdrawing CF_3 groups on both the anilinium and benzyl aromatic rings was studied.Formation constants and structural details were compared to the [2]pseudorotaxanes formed by the two aforementioned dibenzylammonium and 1,2-bis(pyridinium)ethane axles.