The conformational analysis of N-tosyl-substituted diaza crown ethers 1 - 4
by means of NMR spectroscopy and molecular modelling is described. The str
uctures of 1 - 4 were investigated theoretically by empirical and semiempir
ical methods using MSI/DISCOVER97 (ESFF force field) and MOPAC (PM3). Concl
usions about preferred conformations are drawn.