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The article reports according to the chemist at Japan's Mie University, Katsuyuki Hirai, Hideo Tomioka, and coworkers that a triplet diphenylcarbene with unprecedented stability, an organic diradical with unpaired electrons, can survive 24 hours in solution by adding large yet unreactive substituents to the molecule's ortho positions. After a day in solution at room temperature, traces of the triplet carbene were still detectable spectroscopically. The researchers attribute the molecule's remarkable stability to a perpendicular arrangement of the CF3 groups.

Reports on Japanese chemists' discovery of a carbene derivative in the triplet state that is significantly more stable than previously observed triplet carbenes. Possible direction into organic ferromagnetic materials.