Bishomoaromatic 1,2,4-Triboracyclopentane Dianions: Strong Three-Center, Two-Electron Bonds between Three Boron Atoms This work was supported by the Deutsche Forschungsgemeinschaft (Schwerpunktprogramm "Polyeder"), the Fonds der Chemischen Industrie, and by the U.S. National Science Foundation
Angew Chem Int Ed Engl. 2000 Apr;39(7):1272-1275.
doi: 10.1002/(sici)1521-3773(20000403)39:7<1272::aid-anie1272>3.0.co;2-z.