N-2-Nitrobenzylmonoaza-15-crown-5 (2) and N-4-Nitrobenzylmonoaza-15-crown-5, representatives of a new class of N-pivot lariat ethers bearing reducible nitroaromatic side arms, have been prepared and examined by cyclic voltammetric techniques. When the nitro group is sterically disposed to permit interaction with the ring-bound cation, intramolecular ion pairing occurs. This is not the case when the side arm is remote from the macroring nor when the side arm is detached. A thermochemical cycle is used to determine that the binding constant (K//s) enhancement in MeCN solution is 25,000-fold upon electrochemical switching.
ASJC Scopus subject areas
- Colloid and Surface Chemistry