A universally accepted rule of chemical structures was just proven wrong after scientists realized they were looking at the wrong atoms for decades.

Carboranes are specialized molecules used in everything from medicine to advanced materials. For years, the crystal structures of these molecules were interpreted as having specific attachments on carbon atoms. New high-level computations have revealed that these attachments are actually on boron atoms instead. This correction overturns decades of research and textbooks that accepted the previous models as absolute fact. It shows that even in a field as precise as chemistry, fundamental errors can hide in plain sight for a long time. This new understanding will force researchers to rethink how they design and use these critical molecules.