- Rudolph Arthur
- Ronald George Wreyford Norrish
- Rodney Robert Porter
- Robert Wilhelm Bunsen Bunsen
- Robert Sanderson Mulliken
- Robert Robinson
- Robert Floyd Curl, Jr.
- Robert Burns Woodward Woodward
- Roald Hoffmann Hoffmann
- Richard Zsigmondy
- Richard Robert Ernst
- Richard Martin Willstatter
- Richard Kuhn Kuhn
- Richard Smalley Errett
- Reginald Patrick Linstead
- Pierre Lecomte du Nouy Lecomte du Nouy
- Peter Joseph William Joseph William Debye
- Peter Dennis Mitchell
- Paul Sabatier Sabatier
- Paul Karrer
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