Catalyst-Substrate-Complex (IMAGE) Technical University of Munich (TUM) Caption The allenic group of the unwanted enantiomer is much closer to the thioxanthone sensitizer and is therefore converted to the desired form. Credit S. M. Huber and A. Bauer / TUM Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.