Prof. Dr. Wolfgang A. Herrmann
“By no means is it of merit to make an accidental discovery. Much more important is the recognition of possible consequences that might result from serendipity.” Trioxo(η5-pentamethylcyclopentadienyl)rhenium(VII) 1, prepared by chance several years ago, has proved to be a versatile compound, the methyl analogue of which, 2, has also borne fruit. These compounds have enhanced our understanding of olefin metathesis, the oxidative coupling of alkynes, and the oxidation of olefins. Perhaps it will soon be possible to synthesize the WO3 and OsO3 relatives, 3 and 4, respectively.