It does not seem, however, that organic chemists were much worried about barriers to rotation in organic molecules in general at that time because there was no technique available to demonstrate the phenomenon experimentally.
“Self criticism must be my guide to action, and the first rule for its employment is that in itself it is not a virtue, only a procedure.”
“I was in London. It's a long way to go for a very long party, sitting there for six hours not having a cigarette or a drink. It's a waste of time.”