Zeiss, Harold

In July 1955, Harold Zeiss (Fig. 5.3) visited the chemistry department of the University (LMU) in Munchen and gave a seminar, in which he discussed the results of Minoru Tsutsui s doctoral thesis. In this context, he mentioned that Hein s polyphenylchromium compounds might be in fact 7r-arene chromium(I) complexes. Walter Hafner attended the seminar and instantly remembered the outcome of his previous experiments. A few days later, after having repeated the reaction of CrCl3, Al, A1C13 and... 

D. Seyferth, Bis(benzene)chromium. 1. Franz Hein at the University of Leipzig and Harold Zeiss and Minoru Tsutsui at Yale, Organometallics 21, 1520-1530 (2002). 

---