He also headed a research group at the INT .
After a period as assistant from 1970 - 75 in Karlsruhe he had been Professor of Theoretical chemistry at the University of Karlsruhe .
Professor also headed a research group at the INT .
After a period as assistant from 1970 - 75 in Karlsruhe he had been Professor of Theoretical chemistry at the University of Karlsruhe .