Solid state and solution stereochemistry of crown ethers and models. ortho-Dimethoxydiphenyl ether and related dibenzo-15-crown-5 and tetrabenzo-30-crown-10 ethers as studied by X-ray crystallography and ¹H and ¹³C NMR spectroscopy

Abstract

Introduction trends with X-ray derived structural features are presented. Following the early of Tmter and co-workers (I), a Solution 13c chemical shift assignments are made on the basis number of recent publications (2-6) have dealt with correlaof NOESY and l43TCOR results. tions between solid state ' 3~ Nh4R behaviour and X-ray crystallographic structures of benz-annelated crown ethers with a variety of structures. This has included the benzo-and dibenzo-15-crown-5 systems depicted below (1, 5).