William S. Knowles held his Nobel Lecture December 8, 2001, at Aula Magna, Stockholm University. He was presented by Professor Bengt Nordén, Chairman of the Nobel Committee for Chemistry.

The Nobel Prize in Chemistry 2001 was divided, one half jointly to William S. Knowles and Ryoji Noyori "for their work on chirally catalysed hydrogenation reactions" and the other half to K. Barry Sharpless "for his work on chirally catalysed oxidation reactions"

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