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Keywords:

  • bond length alternation;
  • cyclohexatriene;
  • Mills–Nixon effect
Thumbnail image of graphical abstract

Cyclohexatriene lost, cyclohexatriene regained! Recently the Mills–Nixon postulate concerning the structure of benzene derivatives was recognized to be invalid. A new view on strain-induced bond localization in benzene led to the design and synthesis of tris(bicyclo[2.1.1]hexeno)benzene (1), which shows significant distortion toward a cyclohexatriene geometry.