High-resolution ¹³C N.M.R. spectroscopy and x-ray crystallography of complexes formed by NN′-dimethyl-1,7-diaza-4,10- dioxacyclododecane

Results obtained from an X-ray crystal structure determination of the 1:1 complex formed between NN′-dimethyl-1,7-diaza-4,10-dioxacyclododecane (1) and benzylammonium thiocyanate and dynamic ¹³C n m r spectroscopy in CD₂Cl₂ of the 1:1 complex formed between (1) and (S)-α-phenylethylammonium perchlorate vindicate the constitutional and configurational validity of two-point binding with syn stereochemistry between the host and guest species but indicate that conformational isomerism can occur within the host species of such complexes.