For The First Time, Scientists Have Solved A Chemical Mystery That Had Eluded Them For 60 Years

• 9.11.2026, 10:45

The breakthrough came unexpectedly.

Scientists at the University of Würzburg, in collaboration with colleagues from Tezpur University, have synthesized and isolated stable oxoboranes—unusual compounds featuring a triple bond between boron and oxygen. This challenge had remained unsolved for more than 60 years. The study was published in the journal Nature Chemistry.

Boron rarely forms triple bonds. Chemists have already learned to synthesize compounds with such bonds between two boron atoms, as well as between boron and carbon. However, the isolation of stable organic oxoboranes remained a separate challenge for a long time.

Previously, such particles had been detected or captured only under extreme conditions. This helped confirm their existence but did not yield stable samples for comprehensive study.

The breakthrough came unexpectedly. Two graduate students were independently studying the reactions of diboracumene with various ketones—common organic reagents. In both cases, unusual orange or yellow solids appeared.

Analysis showed that the main products were, in fact, oxoboranes. They remained stable long enough to be isolated and studied. In total, the researchers obtained three different compounds of this type, and calculations by their colleagues helped them understand their electronic structure.

The team is now investigating how widely applicable this newly discovered synthetic route is and whether it can be used to produce other hard-to-obtain substances.