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.
“My parents took an interest in nothing, at home no books, no records. My mother and my father are the emblem of indifference, dryness and bad taste. My father is also terribly stingy, in life as well as in feelings: I have never seen him filling up the bathtub.”