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 my work on organic molecules.
-- Roald Hoffmann
   
Roald Hoffmann   Name:
Roald Hoffmann
Type:
Scientist
Nationality:
Polish
Birth:
July 18, 1937
https://www.nutquote.com/quote/Roald_Hoffmann