The crystal structures of -1,3-propane-diylbis(nitrilopropylidyne)]dip
henol, C23H30N2O2, and panediylbis[nitrilo(phenyl)-methylidyne]}diphen
ol, C31H30N2O2, have been determined. The N ... O contact distances in
both molecules are indicative of intramolecular hydrogen bonding. The
molecular conformations are compared and shown to be very similar.