88548-60-1Relevant articles and documents
Synthesis and complex-forming properties of N-substituted diazacrown ethers
Luk'yanenko,Basok,Kulygina,Vetrogon
, p. 1919 - 1924 (2007/10/03)
N-Substituted mono- and diazacrown ether with ethoxycarbonylmethyl, 7-phenyl-3,6-dioxaheptyl, p-methoxy, and p-nitrobenzyl groups in the side chain have been synthesized. Their reactions with alkali and alkaline-earth metals have been studied. Substituent
Direct ESR Evidence for Sodium Selective, Intramolecular Ion Pairing in Redox-Switched Nitrogen-Pivot Lariat Ethers
Delgado, Milagros,Echegoyen, Luis,Gatto, Vincent J.,Gustowski, Deborah A.,Gokel, George W.
, p. 4135 - 4138 (2007/10/02)
N-(2-Nitrobenzyl)aza-15-crown-5, 1, and the sidearm hexadeuterio analogue 2 have been reduced electrochemically to their corresponding radical anion forms and analyzed by ESR.Addition of Li(1+), Na(1+), or K(1+) to the solutions leads to changes in the ESR spectra but the changes are most marked when Na(1+) is present.Essentially no change is observed in the ESR spectrum of 2-nitrotoluene, confirming that both macroring and sidearm must be involved for the intramolecular ion pair to be stable.The radical anion sidearm compexes must be relatively rigid species since the strongest sidearm interaction is observed with Na(1+) cation which is closest in size to the cavity formed by the cooperating macroring and sidearm.