Formation of complexes between aza derivatives of crown ethers and primary alkylammonium salts. Part 4. Diaza-18-crown-6 derivatives
作者:Leslie C. Hodgkinson、Martin R. Johnson、Stephen J. Leigh、Neil Spencer、Ian O. Sutherland、Roger F. Newton
DOI:10.1039/p19790002193
日期:——
dibenzo-18-crown-6 (9b) form strong complexes in methylene chloride with primaryalkylammonium thiocyanates. The n.m.r. spectra of these complexes show temperature dependence which can be explained in the terms of different types of guest exchange processes. The complexes of the dibenzo-18-crown-6 analogue (9b) appear to exist in one form only but the spectra of the complexes of the other 18-crown-6 analogues