- Rudolph Arthur
- Ronaldas George'as Wreyford Norrish
- Rodney Robert Porter
- Robertas Vilhelmas Bunsen
- Robertas Sanderson Mulliken
- Roberto Robinson
- Robertas Floyd Curl, Jr.
- Robert Burns Woodward
- Roald Hoffmann
- Richardo Zsigmondy
- Richard Robert Ernst
- Richardas Martinas Willstatter
- Richardas Kuhn
- Richardas Errett Smalley
- Reginald Patrick Linstead
- Pierre Lecomte Du Nouy Lecomte Du Nouy
- Petras Juozapas Williamas Debye
- Peter Dennis Mitchell
- Paulius Sabatier
- Paulius Karrer
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