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Keywords:

  • isomers;
  • mechanochemistry;
  • polymers;
  • ultrasound;
  • Woodward–Hoffmann rules
Thumbnail image of graphical abstract

Sound bubbles: Their collapse induces mechanical stress that can be transmitted to a target single bond by means of mechanosensitive polymers attached to the two sides of a benzocyclobutene. As surprising as it may be, ultrasound guides molecules into forbidden pathways by promoting the formation of only one isomer regardless of the starting benzocyclobutene.