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The rotational barriers of the C C bonds of halocarbons are believed to be rather different than those of hydrocarbons. We wish to systematically study the effect of halogen substituents on the conformational flexibility of hydrocarbons. As our initial approach to this problem, we have synthesized the following molecules: Pyrene-(CF 2 ) n -Pyrene (n=3, 4, and 6) and Pyrene-(CF ...
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