Beiträge zur Chemie der Pyrrolpigmente, XVII / On the Chemistry of Pyrrole Pigments, XVII

Open Access
Publisher Website
Google Scholar
Abstract
The (Z,Z)-configuration of the bilivioline chromophoric system was established investigating an appropriate model compound by means of pK measurement, 1H NMR spectroscopy Lanthanide ion induced shift technique, electron absorption spectroscopy and PPP calculations. Moreover a syn-syn conformation which is twisted at the a-methine single bond and planar within the pyrromethene unit (based on the concept of partial structures of bile pigments) of the molecule was deduced.