Some model compounds for intramolecular hydrogen bonding are pre- sented. The nmr, IR, UV and fluorescence spectra are shown to be suited for the study of such hydrogen bonds. ... ( Keywords : Hydrogen bond; l ntramolecular proton tranffer ; Mannich bases') ... Intramolekulare Wechselwirkungen, I. Einige Mannich-Basen von Naphtholen al8 Modellverbindungen fiir intramolekulare Wasserstqffbriickenverbindung Eine Klasse yon Verbindungen zur Untersuchung yon ...