Knowing without seeing is at the heart of chemistry.

- Roald Hoffmann

A few atoms added here, subtracted there, is all it takes to make the difference between male and female sex characteristics, between a harmless mole…

- Roald Hoffmann

One day I discovered that one could get the barrier to internal rotation in ethane approximately right using this method. This was the beginning of m…

- Roald Hoffmann

I came to a happy Jewish family in dark days in Europe.

- Roald Hoffmann

From a chemist's point of view, the surface or interior of a star…is boring—there are no molecules there.

- Roald Hoffmann

I am a teacher, and I am proud of it. At Cornell University I have taught primarily undergraduates, and indeed almost every year since 1966 have taug…

- Roald Hoffmann

Not every collision, not every punctilious trajectory by which billiard-ball complexes arrive at their calculable meeting places lead to reaction. ..…

- Roald Hoffmann

I learned English, my sixth language at this point, quite quickly.

- Roald Hoffmann

Alan Rocke's Image and Reality does so many things vividly and convincingly: it shows how visual images led chemistry step by step to the reality of …

- Roald Hoffmann