Conformational and Intramolecular Hydrogen-Bonding Properties of Substituted Dithia[3.3]metacyclophanes

Conformational properties and intramolecular hydrogen-bondings of dithia[3.3]metacyclophanes carrying one or two amino group on their internal positions were studied by 1H-NMR, IR spectra and X-ray structural analyses. It was found out that intramolecular hydrogen-bonding network between amino protons and bridge sulfur atoms is formed and it is closely related to the conformations of cyclophanes.